GSE SYSTEMS INC
10-K, 1999-03-30
PREPACKAGED SOFTWARE
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                                                                       Conformed

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    FORM 10-K

               (Mark One)
               [ X ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   For the fiscal year ended December 31, 1998

                                       OR

              [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                        For the transition period from     to 
                                                       ---    ---

                         Commission File Number 0-26494

                               GSE Systems, Inc. 
             (Exact name of registrant as specified in its charter)

        Delaware                                                52-1868008 
        --------                                                ----------
(State of incorporation)                                  (I.R.S. Employer 
                                                          Identification Number)

9189 Red Branch Road, Columbia, Maryland                         21045    
- ----------------------------------------                         ----- 
(Address of principal executive offices)                        (Zip Code)

       Registrant's telephone number, including area code: (410) 772-3500

        SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: 

                          Common Stock, $.01 par value
                              (Title of each class)

           SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:NONE
                          

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X No
                                             --   --

     Indicate by check mark if disclosure of delinquent  filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

     The  aggregate  market value of Common Stock held by  non-affiliates  as of
March 15,  1999 was  $13,476,996  based on  closing  price of such stock on that
date.

  Number of shares of Common Stock outstanding as of March 15, 1999: 5,065,688.

                       DOCUMENTS INCORPORATED BY REFERENCE

     Part  III   incorporates   certain   information   by  reference  from  the
Registrant's  definitive proxy statement to be filed for its 1999 annual meeting
of shareholders.

<PAGE>

                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998


                                                              
                                TABLE OF CONTENTS


PART I                                                                    Page
Item 1.    Business....................................................      3
Item 2.    Properties..................................................     13
Item 3.    Legal Proceedings...........................................     13
Item 4.    Submission of  Matters to a Vote of Security Holders........     13

PART II
Item 5.    Market for the Registrant's Common Equity and Related
              Stockholder Matters.......................................    14
Item 6.       Selected Financial Data...................................    15
Item 7.       Management's Discussion and Analysis of Financial Condition
                 and Results of Operations..............................    16
Item 7A       Quantitative and Qualitative Disclosures About Market Risk    24
Item 8.       Financial Statements and Supplementary Data...............    25
Item 9.       Changes in and Disagreements with Accountants
                 on Accounting and Financial Disclosure.................    26

PART III
Item 10.   Directors and Executive Officers of the Company*.............    27
Item 11.   Executive Compensation*......................................    27
Item 12.   Security Ownership of Certain Beneficial Owners
                 and Management*........................................    27
Item 13.   Certain Relationships and Related Transactions*..............    27

PART IV
Item 14.   Exhibits, Financial Statement Schedules, and
                 Reports on Form 8-K....................................    28

SIGNATURES..............................................................    29

*    to  be   incorporated  by  reference  from  the  Proxy  Statement  for  the
     registrant's 1999 Annual Meeting of Stockholders.

<PAGE>
         Cautionary Statement Regarding Forward-Looking Statements.

This Form 10-K contains certain "forward-looking statements," within the meaning
of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the
Securities  Exchange  Act of 1934,  as  amended,  which are  subject to the safe
harbors created by those Acts. These statements include the plans and objectives
of management for future operations,  including plans and objectives relating to
the  development  of the  Company's  business in the domestic and  international
marketplace.  All  forward-looking  statements  involve risks and uncertainties,
including,  without  limitation,  risks  relating  to the  Company's  ability to
enhance existing software products and to introduce new products in a timely and
cost-effective  manner,  reduced  development  of nuclear  power plants that may
utilize the Company's  products,  a long pay-back  cycle from the  investment in
software development, uncertainties regarding the ability of the Company to grow
its revenues and  successfully  integrate  operations  through  expansion of its
existing  business  and  strategic  acquisitions,  the ability of the Company to
respond  adequately  to rapid  technological  changes in the markets for process
control and  simulation  software  and systems,  significant  quarter-to-quarter
volatility  in revenues and earnings as a result of customer  purchasing  cycles
and other factors,  dependence upon key personnel, and general market conditions
and  competition.  See  Risk  Factors,  below.  The  forward-looking  statements
included herein are based on current  expectations  that involve  numerous risks
and  uncertainties  as set forth  herein,  the failure of any one of which could
materially  adversely affect the operations of the Company.  The Company's plans
and  objectives  are also based on the  assumptions  that market  conditions and
competitive  conditions  within  the  Company's  business  areas will not change
materially or adversely and that there will be no material adverse change in the
Company's operations or business.  Assumptions relating to the foregoing involve
judgments with respect, among other things, to future economic,  competitive and
market conditions and future business  decisions,  all of which are difficult or
impossible to predict accurately and many of which are beyond the control of the
Company.  Although the Company  believes  that the  assumptions  underlying  the
forward-looking  statements  are  reasonable,  any of the  assumptions  could be
inaccurate and there can,  therefore,  be no assurance that the  forward-looking
statements included in this Form 10-K will prove to be accurate. In light of the
significant  uncertainties  inherent in the forward-looking  statements included
herein,  the  inclusion  of  such  information  should  not  be  regarded  as  a
representation  by the Company or any other person that the objectives and plans
of the Company will be achieved.

                                     PART I

ITEM 1.  BUSINESS.
         --------

     GSE Systems,  Inc. ("GSE Systems", or the "Company")  designs, develops and
delivers business and technology  solutions by applying  high-technology-related
process   control,   high  fidelity   simulation,   systems  and  services  into
applications   for   worldwide   industries   including   energy   and   process
manufacturing.   The  Company's  solutions  and  services  assist  customers  in
improving  quality,  safety and throughput;  reducing  operating  expenses;  and
enhancing overall productivity.

     The Company's products are used in over 500 applications, representing over
200 customers in 30 countries, in the following industries:  specialty chemical,
food & beverage,  petroleum refining,  pharmaceutical,  fossil and nuclear power
generation, and metals.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
           
     Recent Developments.

     In 1998,  the Company had  significantly  improved  financial  results over
1997. The third and fourth quarters of 1998 generated positive operating results
for the core  businesses of controls and  simulation.  These improved  financial
results are reflective of the Company's strategy,  as previously  disclosed,  to
return to its strengths  within these core  businesses,  while  controlling  and
reducing  costs.  The  divestiture  of  certain  operations  outside of the core
businesses was an integral part of this strategy.

     In May 1998,  the Company  completed the sale of  substantially  all of the
assets of GSE  Erudite  Software,  Inc.  ("Erudite  Software")  to  Keane,  Inc.
("Keane"),  pursuant to an asset purchase agreement, dated as of April 30, 1998,
by and among the Company,  Erudite  Software and Keane.  In November  1998,  the
Company  completed the sale of certain assets related to activities of its Oil &
Gas business unit ("O&G"), to Valmet Automation (USA), Inc. ("Valmet"), pursuant
to an asset purchase agreement, effective as of October 30, 1998, by and between
the Company and Valmet.  Both sales are more fully  explained in "Liquidity  and
Capital Resources", and in "Notes to Consolidated Financial Statements."

     Due to the poor  financial  results in 1997,  the senior  management of the
Company has been  substantially  changed and current management has set a course
to reduce  costs and to return the  Company's  focus to its core  businesses  of
controls and simulation. The Company is implementing this strategy utilizing two
business units:

     *    Power,  which  is  primarily  concentrated  in  the  power  generation
          industry, and
     *    Process,  which  utilizes  process  controls and simulation in various
          process industries.

     Having  completed  the initial  phase of its strategy to return to its core
businesses,  the Company has begun  pursuit of  strategic  growth  opportunities
consistent  with  these  core  businesses.  Generally,  the  Company  is seeking
complimentary  opportunities that management believes can be implemented without
diverting the focus of the Company or its management from its internal strengths
and plans for organic growth.

     The Company's  Common Stock had  previously  traded on the NASDAQ  National
Market System under the symbol  "GSES".  In January 1999,  the Company's  Common
Stock was approved for listing the American Stock Exchange,  where it now trades
under the symbol "GVP".

     Further  changes to senior  management  of the Company have been  completed
over the last  twelve  months and the  current  management  plans to continue to
manage costs and maintain the Company's focus on its core businesses of controls
and simulation.

     The   management   team  of  the  Company   believes  that   aforementioned
developments  will provide for a viable  operating  entity and will position the
Company for success in the future.

     Background.

     GSE  Systems  was  formed  on  April 13,  1994,  by  ManTech  International
Corporation ("ManTech"), GP Strategies Corporation ("GP Strategies" and formerly
known  as  "National  Patent   Development   Corporation"  or  "NPDC")  and  its
affiliates,  General  Physics  Corporation  ("GPC") and SGLG,  Inc.  ("SGLG" and
formerly  known  as "GPS  Technologies,  Inc."  or  "GPS");  and  Vattenfall  AB
("Vattenfall")  to consolidate  the  simulation and related  businesses of their
affiliates,  GSE Power  Systems,  Inc.  ("Power  Systems" and formerly  known as
"Simulation, Systems & Services Technologies Company" or "S3 Technologies"),  GP
International  Engineering & Simulation,  Inc.  ("GPI") and GSE Power Systems AB
("Power  Systems  AB" and  formerly  known as  "EuroSim  AB" or  "EuroSim").  On
December 30, 1994, GSE Systems expanded into the process control automation, and
supply chain  management  consulting  industry  through its  acquisition  of the
process systems division of Texas  Instruments  Incorporated  ("TI"),  which the
Company operates as GSE Process Solutions, Inc. ("Process Solutions").

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     In April  1996,  the  Company  aligned  its  operating  groups  into  three
strategic  business  units  (SBUs) to better  serve  its then  primary  vertical
markets - Power,  Process and Oil & Gas. The realignment  allowed the Company to
focus on providing all of its  technologies to these markets,  while  addressing
the specific needs of each market and delivering industry specific solutions.

     In May 1996, the Company acquired Erudite Software,  a regional provider of
client/server  technology,  custom application  software  development,  training
services,   hardware/software  sales,  and  network  design  and  implementation
services.  Erudite Software was subsequently  combined with a small pre-existing
consulting group within the Company to form the Company's Business Systems unit.

     In December 1997, the Company acquired 100% of the outstanding common stock
of J.L.  Ryan,  Inc.,  ("Ryan"),  a provider of  engineering  modifications  and
upgrade  services to the power plant simulation  market.  The combination of the
Company's pre-existing  technology with the technical staff of the acquired Ryan
business has positioned the Company to be more competitive for modifications and
upgrade services projects within the nuclear simulation market.

     In April 1998, the Company divested the Erudite Software  business to Keane
Inc. for  approximately  $9 million in cash. In addition to the cash at closing,
Keane has issued a promissory  note for an  additional  $1 million to be paid to
GSE Systems on the first  anniversary  of the closing,  subject to offset in the
case of any claims for  indemnification.  See "Liquidity and Capital  Resources"
and "Notes to Consolidated Financial Statements".

     In November  1998,  the Company  divested  certain  assets of the Oil & Gas
business unit to Valmet  Automation  (USA),  Inc.  ("Valmet") for cash, plus the
assumption of certain identified liabilities. The transaction also provides that
the Company remain  responsible for certain cost overruns,  claims and unassumed
liabilities.  Included  in the  sale  was an  assignment  to  Valmet  of all the
Company's rights to the S/3 SCADA (TM) product,  a license for Valmet to use the
Company's SimSuite  Pipeline(TM)  product, and an assignment of GSE's rights and
obligations   under  certain   customer   contracts,   maintenance  and  support
arrangements.  See "Liquidity and Capital  Resources" and "Notes to Consolidated
Financial Statements".

     Business Strategy.

     GSE Systems possesses the ability to combine real-time control  automation,
real-time  simulation  and  application  engineering  for true  problem  solving
techniques and  solutions.  The Company  believes this provides a  technological
advantage  which,  when combined with its focused  efforts on targeted  industry
markets and defined Application  Solution approach,  allows its staff to assess,
define, develop, and apply innovative solutions that meet the current and future
industry-specific needs of its customers.

     Users in the markets served by the Company want to focus their resources on
their own customers and wish to spend less  resources on managing  areas such as
control  and  simulation  systems,  which  are the core  strengths  of GSE.  Its
products  and services are  designed to help its  customers  solve  problems and
create opportunity within these areas.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Within the targeted industry segments, the Company seeks customers who will
make investments based primarily on one of the following four basic goals:

     *    Increase in yield or efficiency
     *    Improvement in quality
     *    Solution to an environmental concern
     *    Solution a safety concern

     All  of  these  directly  or  indirectly  impact  the  profitability  of  a
particular customer. GSE Systems utilizes its expertise within real-time control
automation,   real-time  simulation  and  application   engineering  to  provide
solutions to its customers in those areas.

     The Company  believes  that GSE Systems can partner with  customers to help
provide  them  with  cost-effective   solutions  for  problems  associated  with
simulation and control, which would allow its customers to focus their resources
on their own strengths.

     Services and Products.

     GSE Systems has developed  its  knowledge and expertise in process  control
and  simulation  systems  which  are  utilized  to  improve,  control  and model
processes.  This expertise is  concentrated  heavily in the process  industries,
which include the chemicals,  food & beverage,  and  pharmaceuticals  fields, as
well as in the power generation industry, where the Company is a world leader in
nuclear power plant simulation.

     As the Microsoft Windows NT(R) operating  environment  continues to evolve,
the Company has continued the migration of its products to this platform in such
a way as to assure current customers' legacy applications will function properly
while at the same time offering the advantages of the new  technology.  Although
the Company uses open standards for its products,  the Company's standard system
configurations  are based on  proprietary  technology  and  know-how,  which are
necessary  to  meet  the  requirements  of its  customers  in the  controls  and
simulation markets.

     The Company's business model is based on software licensing and value-added
services,  as well as hardware  sales.  Because this model is based primarily on
software and value-added services, the Company believes that it can maintain its
business model in an environment of rapidly decreasing hardware costs.

     In the Process Business Unit, the flagship product is a Distributed Control
System  ("DCS")  product,  known as the D/3 DCS(TM) that is highly  flexible and
open. This product is a real-time  system,  which uses multiple  process control
modules  to  monitor,  measure,  and  automatically  control  variables  in both
continuous  and  complex  batch  processes,  as well as form  the  platform  for
plant-wide information for use by operators, engineers and management.

     Other products include the following:

     *    FlexBatch(R), a flexible batch manufacturing system used to facilitate
          the rapid creation of various batch production processes;

     *    TotalVision(TM),   which  is  a  graphical   system  that  provides  a
          client/server-based  human-machine interface for real-time process and
          plant information; and

     *    SABL(TM),  which is a sophisticated batch and sequential manufacturing
          software  language  that  permits the  scheduling  and tracking of raw
          materials  and  finished  products,   data  collection  and  emergency
          shutdown procedures.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     The  Company's  proprietary  technology  also  includes  real-time, dynamic
simulation tools and products that are used to develop high fidelity simulations
for use in petroleum refineries, chemical processing plants and other industrial
plants.  The most  prominent  set of  products  and  tools  is know as  SimSuite
Pro(TM),  which  facilitates  design  verification,   process  optimization  and
operator training.

     The Power  Business Unit focuses on developing  high  fidelity,  real time,
dynamic  simulators for nuclear and fossil power plants for use in both operator
training  and plant  optimization.  GSE's  SimSuite  Power (TM) set of auto-code
generators  provides  state of the art simulation of flow  processes,  logic and
control systems and electrical  distribution  systems within a power plant. This
technology  is both  licensed by the Company to its customers as well as used by
the Company to develop simulators for its customers.

     In addition, other products include:

     *    SimExec (TM), a Windows NT(R) based simulation  executive system which
          controls all simulation  activities  and allows for off-line  software
          development environment in parallel with the training environment.

     *    RACS, a fully integrated Access Control and Intrusion Detection System
          ideally  suited for nuclear  power plant  security  applications,  and
          other large, multi-access facilities.

     *    SIMON  (TM),  a  computer   workstation  system  used  for  monitoring
          stability of boiling  water  reactors  plants.  SIMON(TM)  assists the
          operator  in  determining  potential   instability  events,   enabling
          corrective action to be taken to prevent unnecessary plant shutdowns.

     The Company also provides  value-added services to help users plan, design,
implement, and manage/support  simulation and control systems.  Services include
application   engineering,   project   management,   training,   site  services,
maintenance contracts and repair.

     Customers.

     The Company has provided over 500 simulation and process control systems to
an installed base of over 200 customers worldwide. In 1998, approximately 47% of
the Company's  worldwide revenue was generated from end users outside the United
States.

     The Company's  customers  include,  among others,  Archer  Daniels  Midland
Company,  Bethlehem Steel Corporation,  BASF Corporation,  Cargill Incorporated,
Carolina  Power and Light  Company,  Commonwealth  Edison  Company,  Eskom South
Africa,  Karnaraft Sakerhet & Utbildning AB, Miller Brewing Company, and Pacific
Northwest National Laboratory.

     No individual  customer  represented  more than 10% of the  Company's  1998
revenue.

     Strategic Alliances.

     In recent years, a high portion of the Company's international business has
come from major  contracts in Europe,  the republics of the former Soviet Union,
and the  Pacific  Rim.  In order to acquire and  perform  these  contracts,  the
Company entered into strategic  alliances or partnerships  with various entities
including:  Automation  Systems Co. Inc., a subsidiary  of ManTech China Systems
Corporation;  Siemens AG (Europe);  All Russian  Research  Institute for Nuclear
Power  Plant  Operation  (Russia);   Kurchatov   Institute   (Russia);   Samsung
Electronics  (Korea);  Toyo Engineering  Corporation  (Japan); and Institute for
Information  Industry  (Taiwan).  These  alliances  have  enabled the Company to
penetrate  work in these regions by combining its  technological  expertise with
the regional or local presence and knowledge of its partners.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Also, the Company  continues to believe that it must have strong  solutions
partners as well as strong technology partners in order to address the myriad of
systems needs of its customers in the various  geographical  areas in which they
do business.

     Sales and Marketing.

     The Company  markets its products and services  through a network of direct
sales staff,  agents and  representatives,  systems  integrators  and  strategic
alliance  partners.  The Company also employs  personnel that support  corporate
advertising, literature development and exhibit/conference participation.

     GSE Systems employs a direct sales force in the  continental  United States
which is regionally based, market focused and trained on its product and service
offerings.  Market-oriented  business and customer  development teams define and
implement specific campaigns to pursue  opportunities in the power,  process and
manufacturing   marketplaces.   This  effort  is  supported  by  an   extensive,
regionally-based  support organization focused on the current customer installed
base. The Company's ability to support its multi-facility,  international and/or
multinational  clients,  is facilitated by its network of offices throughout the
U.S. and overseas.  Within the U.S., the Company  maintains offices in: Georgia,
Louisiana,  Maryland, North and South Carolina,  Pennsylvania and Texas. Outside
the U.S., the Company has offices in Sweden, Belgium,  Singapore,  Japan, Taiwan
and Korea. In addition to its offices located overseas, the Company's ability to
conduct international business is enhanced by its multilingual and multicultural
work force.

     Strategic alliance partners,  systems  integrators and agents represent the
Company's  interests in Russia,  Germany,  Switzerland,  Spain,  Czech Republic,
Slovakia,  United  Arab  Emirates,  India,  South  Africa,  Venezuela,   Mexico,
Argentina, and the Peoples Republic of China.

     Product Development.

     In 1998,  the Company  continued  investment  in the  conversion of its D/3
DCS(TM) product to the Microsoft Windows NT(R) platform,  and the productization
of its  SimSuite(TM)  software tools.  During the years ended December 31, 1998,
1997 and 1996,  gross  research  and product  development  expenditures  for the
Company  were  $4.3  million,  $5.1  million  and  $5.8  million,  respectively.
Capitalized  software  development costs totaled $2.3 million,  $3.5 million and
$3.9 million during the years ended December 31, 1998, 1997 and 1996. See Note 2
of  "Notes  to  Consolidated  Financial  Statements"  for a  discussion  of  the
Company's policy regarding capitalization of software development costs.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Industries Served.

     The following chart illustrates the approximate percentage of the Company's
1998,  1997 and 1996 revenues,  respectively,  attributable to each of the major
industries served by the Company:
          

<TABLE>
<CAPTION>

           <S>                         <C>          <C>          <C>
                                        1998         1997         1996
                                       ------       ------       ------
                              
          Power                          42 %         31 %         45 % 
          Process                        49 %         46 %         32 %
          Other                           9 %         23 %         23 %
                                       ------       ------       ------      
               Total                    100 %        100 %        100 % 
                                       ======       ======       ======

</TABLE>

     Contract Backlog.

     The Company  does not reflect an order in backlog  until it has  received a
contract that specifies the terms and milestone  delivery  dates. As of December
31, 1998, the Company's  aggregate contract backlog totaled  approximately $52.7
million. At December 31, 1997, contract backlog totaled $39.0 million.

     Employees.

     As of December 31, 1998, the Company had 371 employees,  which represents a
decrease  of  approximately  30%  compared to December  1997.  This  decrease is
primarily   attributable  to  the  termination  of  employment  of  151  and  21
individuals  in  connection  with the  divestitures  of the  assets  of  Erudite
Software and O&G, respectively.

     GSE  Systems'  operations  are  dependent  on the efforts of its  technical
personnel and its senior  management.  Thus,  recruiting  and retaining  capable
personnel,  particularly engineers, computer scientists and other personnel with
expertise in computer  software and  hardware,  as well as  particular  customer
processes,  are critical to the future  performance of the Company.  Competition
for qualified technical and management  personnel is substantial.  


RISK FACTORS.
- ------------

     Fluctuations in Quarterly Operating Results, Market Price.

     The  Company's  operating  results  have  fluctuated  in the  past  and may
fluctuate  significantly  in the  future as a result of a  variety  of  factors,
including  purchasing  patterns,  timing of new products and enhancements by the
Company and its competitors,  and fluctuating foreign economic conditions. Since
the Company's  expense levels are based in part on its expectations as to future
revenues,  the  Company may be unable to adjust  spending in a timely  manner to
compensate for any revenue  shortfall and such revenue  shortfalls  would likely
have a disproportionate  adverse effect on net income. The Company believes that
these  factors  may cause the market  price for the Common  Stock to  fluctuate,
perhaps significantly. In addition, in recent years the stock market in general,
and the shares of technology  companies in particular,  have experienced extreme
price fluctuations. The Company's Common Stock has also experienced a relatively
low trading volume, making it further susceptible to extreme price fluctuations.
See Item 7.  Management's  Discussion  and Analysis of Financial  Condition  and
Results of Operations.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     International Sales and Operations.

     Sales of products and the  provision  of services to end users  outside the
United States  accounted  for  approximately  47% of the Company's  consolidated
revenues in 1998. The Company  anticipates that international sales and services
will  continue  to account  for a  significant  portion of its  revenues  in the
foreseeable  future.  As a result,  the Company may be subject to certain risks,
including  risks  associated  with the  application and imposition of protective
legislation and regulations  relating to import or export  (including  export of
high  technology  products) or otherwise  resulting from trade or foreign policy
and risks associated with exchange rate  fluctuations.  Additional risks include
potentially  adverse  tax  consequences,  tariffs,  quotas  and other  barriers,
potential  difficulties involving the Company's strategic alliances and managing
foreign sales agents or representatives  and potential  difficulties in accounts
receivable  collection.  The  Company  currently  sells  products  and  provides
services to  customers in emerging  market  economies  such as Russia,  Ukraine,
Bulgaria,  and the Czech  Republic,  as well as to customers in countries  whose
economies have suffered in the recent Asian  financial  crisis.  The Company has
taken  steps  designed  to reduce the  additional  risks  associated  with doing
business in these countries,  but the Company believes that such risks may still
exist and include,  among others,  general  political and economic  instability,
lack of currency  convertibility,  as well as  uncertainty  with  respect to the
efficacy of applicable  legal systems.  There can be no assurance that these and
other factors will not have a material adverse effect on the Company's business,
financial condition or results of operations. Furthermore, the Company's ability
to expand its business into certain emerging international markets is dependent,
in part, on the ability of its customers to obtain financing.

     Revenues in the Nuclear Power Industry.

     Although,  the Company has reduced its reliance on the development of large
application  systems having multi-year  delivery  schedules,  such as full-scope
nuclear power plant simulation  projects,  the Company will continue to derive a
significant  portion  of  its  revenues  from  customers  in the  nuclear  power
industry,  particularly  the  international  nuclear  power  industry,  for  the
foreseeable  future.  The  Company's  ability  to  supply  nuclear  power  plant
simulators  and related  products and  services is  dependent  on the  continued
operation of nuclear power plants and, to a lesser extent,  on the  construction
of new nuclear  power  plants.  A wide range of factors  affects  the  continued
operation and construction of nuclear power plants,  including the political and
regulatory environment,  the availability and cost of alternative means of power
generation,  the  occurrence  of  future  nuclear  incidents,  general  economic
conditions and the ability of customers to obtain adequate financing.

     Revenues in the Chemicals Industry.

     The  Company  derives a  portion  of its  revenues  from  companies  in the
chemicals industry.  Accordingly,  the Company's future performance is dependent
to a certain  extent upon the demand for the Company's  products by customers in
the chemical industry. The Company's revenues may be subject to period-to-period
fluctuations as a consequence of industry  cycles,  as well as general  domestic
and  foreign  economic  conditions  and  other  factors  affecting  spending  by
companies in the Company's target process industries.  There can be no assurance
that such  factors  will not have a  material  adverse  effect on the  Company's
business, operating results and financial condition.

    Product Development and Technological Change.

     The  Company  believes  that its  success  will depend in large part on its
ability to maintain and enhance its current product line,  develop new products,
maintain  technological  competitiveness and meet an expanding range of customer
needs. The Company's product development activities are aimed at the development
and expansion of its library of software  modeling tools, the improvement of its
display systems and workstation technologies,  and the advancement and upgrading
of its simulation and process control technologies. The life cycles for software
modeling  tools,  display  system  software,   process  control  and  simulation
technologies  are  variable and largely  determined  by  competitive  pressures.
Consequently,  the Company will need to continue to make significant investments
in research  and  development  to enhance and expand its  capabilities  in these
areas and to maintain its competitive advantage.

     The  Company's  products are offered in markets  affected by  technological
change and emerging standards which are influenced by customer preferences.  The
Company has expended  significant  resources in developing  versions of its core
products which operate in the  increasingly-popular  Windows NT(R)  environment,
however,  there can be no  assurance  of customer  acceptance  of these  Windows
NT(R)-based  products or that these products will be  competitive  with products
offered by the  Company's  competitors.  Although the Company  believes  that no
significant trends to migrate to other operating  platforms currently affect the
markets for the Company's  products,  there can be no assurance  that  customers
will not  require  compatibility  with such  other  operating  platforms  in the
future.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Intellectual Property Rights.

     Although the Company  believes that factors such as the  technological  and
creative skills of its personnel,  new product  developments,  frequent  product
enhancements and reliable product  maintenance are important to establishing and
maintaining a technological leadership position, the Company's business depends,
in part, on its intellectual  property rights in its proprietary  technology and
information.  The Company relies upon a combination of trade secret,  copyright,
patent and  trademark  law,  contractual  arrangements  and  technical  means to
protect its  intellectual  property  rights.  The Company  generally enters into
confidentiality  agreements with its employees,  consultants,  joint venture and
alliance partners,  customers and other third parties that are granted access to
its proprietary information,  and generally limits access to and distribution of
its  proprietary  information.  There  can be no  assurance,  however,  that the
Company has protected or will be able to protect its proprietary  technology and
information adequately, that the unauthorized disclosure or use of the Company's
proprietary  information  will be  prevented,  that  others have not or will not
develop similar technology or information  independently,  or, to the extent the
Company owns patents,  that others have not or will not be able to design around
those patents. Furthermore, the laws of certain countries in which the Company's
products  are  sold do not  protect  the  Company's  products  and  intellectual
property rights to the same extent as the laws of the United States.

     Competition.

     The Company's  businesses operate in highly  competitive  environments with
both domestic and foreign competitors,  many of whom have substantially  greater
financial, marketing and other resources than the Company. The principal factors
affecting competition include price, technological  proficiency,  ease of system
configuration, product reliability, applications expertise, engineering support,
local presence and financial stability. The Company believes that competition in
the simulation and process automation fields may further intensify in the future
as a result of advances in technology, consolidations and/or strategic alliances
among  competitors,  increased  costs required to develop new technology and the
increasing  importance of software content in systems and products.  The Company
believes that its technology leadership,  experience,  ability to provide a wide
variety of solutions,  product support and related  services,  open architecture
and  international  alliances  will  allow it to  compete  effectively  in these
markets.  As the Company's business has a significant  international  component,
changes in the value of the dollar could adversely affect the Company's  ability
to compete internationally.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Year 2000 Legal Climate, Generally.
 
     Significant  uncertainty  exists in the software  industry  concerning  the
potential  effects of failure  of  computer  programs  and  embedded  systems to
adequately  function  through  and  after the Year 2000  millenium  change.  The
Company is currently  implementing a testing and compliance program to ascertain
whether  and to what  extent  the  Company  may need to  update  certain  of its
software products to become Year 2000 ready. The Company does not intend to test
or modify all prior  versions of its  software  products,  test the  behavior of
current products when used on non-Year 2000-ready computer systems,  test custom
applications  developed by or for customers,  or test certain  current  software
products that the Company plans to replace with either new software  products or
Year 2000 ready releases by the end of 1999.  Certain of the Company's  software
products  are  currently  Year 2000  ready;  however,  the  Company  has not yet
completed  testing  on many of the other  software  products  that it intends to
test.  There can be no  assurance  that the  Company  will  complete in a timely
manner the testing of such software  products or the  development of any updates
necessary  to render such  software  products  Year 2000 ready.  There can be no
assurance  that the Company will not encounter  Year 2000 problems  arising from
recently  acquired  technologies or any other  technologies that the Company may
acquire in the future.  Moreover, the ability of the Company's software products
to comply with Year 2000  requirements  depends in part upon the availability of
Year 2000 ready versions of operating systems and software  applications used by
or with the  Company's  products.  There  can be no  assurance  that  Year  2000
problems will not cause the Company to incur material  expenses in responding to
such  problems,  result in  third-party  claims against the Company or otherwise
have a material adverse effect on the Company's business,  operating results and
financial condition.

     The Company has reviewed  certain  internal  information  systems to assess
Year 2000 compliance.  The Company expects that its internal system  development
plans  will  address  the Year  2000  issue  and will  correct  mission-critical
systems.  The Company  believes that the cost of any  modifications  will not be
material.  However,  the Company's ability to implement its information  systems
plan and to make the necessary  modifications  or replacements  may be adversely
affected by a number of factors  outside the control of the  Company,  including
the availability and cost of trained personnel and the ability of such personnel
to acquire  Year 2000 ready  systems  and  otherwise  to locate and  correct all
relevant computer codes.

     The Company is also  conducting an assessment of certain other systems that
may affect its  operations in order to more fully identify and plan for any Year
2000 risks.  If there are  unidentified  dependencies on such systems to operate
the  business,  or if any required  modifications  are not completed on a timely
basis or are more costly to implement than currently anticipated,  the Company's
business,  financial  condition  or results of  operations  could be  materially
adversely affected.

     Reliance on Key Technical and Executive Personnel.

     The  Company's  operations  are  dependent on the efforts of its  technical
personnel and its senior  management.  Thus,  recruiting  and retaining  capable
personnel,  particularly engineers, computer scientists and other personnel with
expertise  in  computer  software  and  hardware,  are  critical  to the  future
performance of the Company.  Competition for qualified  technical and management
personnel is substantial, and there can be no assurance that the Company will be
successful in attracting  and retaining the personnel it requires to continue to
operate profitably.

     Legal Liability.

     The Company's  business  could expose it to third party claims with respect
to product,  environmental and other similar  liabilities.  Although the Company
has sought to protect itself from these potential  liabilities through a variety
of legal and contractual provisions as well as through liability insurance,  the
effectiveness  of such  protections  has not been fully  tested.  The failure or
malfunction  of one of the Company's  systems or devices could create  potential
liability for substantial monetary damages and environmental cleanup costs. Such
damages  or  claims  could  exceed  the  applicable  coverage  of the  Company's
insurance.  Although  management has no knowledge of material  liability  claims
against the Company to date, such potential  future claims could have a material
adverse effect on the business or financial condition of the Company. Certain of
the  Company's  products and services  are used by the nuclear  power  industry;
although  the  Company  believes  that it does  not have  significant  liability
exposure  associated  with such use as nearly  all such  products  and  services
relate to training,  and although the Company's  contracts for such products and
services  typically  contain  provisions  designed to protect  the Company  from
potential  liabilities  associated with such use, there can be no assurance that
the  Company  would not be  materially  adversely  affected by claims or actions
which may potentially arise.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Influence of Affiliate Stockholders.

     As of the date of this report,  certain  directors,  executive officers and
other parties which are affiliates of the Company beneficially own approximately
45% of the Common Stock of the Company. If these stockholders vote together as a
group,  they will be able to exert  significant  influence  on the  business and
affairs of the Company,  including the election of  individuals to the Company's
Board of  Directors,  and the  outcome  of  actions  which  require  stockholder
approval.
    
ITEM 2.  PROPERTIES.
         ----------

     In early 1998,  the Company  entered  agreements  whereby the lease for its
then-existing  Columbia facility was terminated and the operations that occupied
such  facility were  relocated  into two separate  facilities  during the second
quarter of 1998; one of these facilities is in Columbia, Maryland (approximately
53,000 square feet) and is occupied by the operations of Power Systems,  as well
the Company's corporate  headquarters  offices and support functions;  the other
facility is in  Baltimore,  Maryland  (approximately  33,000 square feet) and is
occupied by the  operations  of Process  Solutions.  During the first quarter of
1999,  the Company has leased an  additional  6,000 square feet in the Baltimore
facility. Each of the leases for these smaller facilities has a term of ten (10)
years.

     In addition,  the Company also leases office space domestically in Georgia,
Louisiana, Texas, Pennsylvania, North and South Carolina, as well as in Belgium,
Japan, Korea, Singapore,  Sweden and Taiwan. The Company leases these facilities
for terms ending between 1999 and 2002.

ITEM 3.  LEGAL PROCEEDINGS.
         -----------------

     The Company is from time to time involved in legal  proceedings  incidental
to the conduct of its  business.  The Company  currently is not a party to legal
proceedings  which, in the opinion of management,  are likely to have a material
adverse  effect on the  Company's  business,  financial  condition or results of
operations.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
         ---------------------------------------------------

     No matter was  submitted to a vote of security  holders  during the quarter
ended December 31, 1998.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
                                     PART II


ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.
         ---------------------------------------------------------------------

     The following  table sets forth for the periods  indicated the high and low
sale prices for the Common Stock reported by the Nasdaq National Market System.
                                    
<TABLE>
<CAPTION>

     <S>                 <C>                      <C>                 <C>
                         1997                     High                Low
     First Quarter............................... $ 11                $ 5 3/4
     Second Quarter.............................. $ 7 1/4             $ 4 3/8 
     Third Quarter............................... $ 6 3/4             $ 3 3/4
     Fourth Quarter.............................. $ 6 3/4             $ 3 
                                                                                                 
                         1998                     High                Low
     First Quarter............................... $ 3 1/2             $ 2
     Second Quarter.............................. $ 5                 $ 2 1/4
     Third Quarter............................... $ 3 11/16           $ 1
     Fourth Quarter.............................. $ 3 1/2             $ 2 1/4

</TABLE>
     
     The Company's  Common Stock had  previously  traded on the NASDAQ  National
Market System under the symbol  "GSES".  In January 1999,  the Company's  Common
Stock was approved for listing the American Stock Exchange,  where it now trades
under the symbol "GVP".

     There were  approximately  41  holders of record of the Common  Stock as of
March 15, 1999.  Based upon  information  available to it, the Company  believes
there are approximately 700 beneficial  holders of the Common Stock. The Company
has never  declared  or paid a cash  dividend on its Common  Stock.  The Company
currently   intends  to  retain  future  earnings  to  finance  the  growth  and
development of its business,  and therefore does not anticipate  paying any cash
dividends in the foreseeable future.

     The Company believes  factors such as quarterly  fluctuations in results of
operations  and  announcements  of  new  products  by  the  Company  or  by  its
competitors may cause the market price of the Common Stock to fluctuate, perhaps
significantly. In addition, in recent years the stock market in general, and the
shares of technology  companies in particular,  have  experienced  extreme price
fluctuations.  The Company's  Common Stock has also experienced a relatively low
trading  volume,  making it further  susceptible to extreme price  fluctuations.
These  factors may  adversely  affect the market price of the  Company's  Common
Stock.

     In 1998,  the Company  granted  stock  options to two  directors to acquire
50,000  shares of Common Stock in the  aggregate  at an exercise  price of $2.25
(each  such  director  has agreed  that he would not  exercise  his option  with
respect to more that 12,500  shares until such time as  stockholder  approval is
obtained).

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

ITEM 6.  SELECTED FINANCIAL DATA.
         -----------------------

     The following  tables  present  selected  combined  financial data of Power
Systems,  GPI, Power Systems AB and Erudite  Software with respect to the period
January 1, 1994  through  April 13,  1994  (unaudited)  and of the  Company  for
periods after April 13, 1994.  Historical  results of the Company from April 13,
1994 through  December 31, 1994 include the  operations of Power  Systems,  GPI,
Power Systems AB and Erudite Software.  Power Systems, GPI, Power Systems AB and
Erudite Software are collectively referred to as the "Predecessors" with respect
to the period between January 1, 1994 and April 13, 1994. The balance sheet data
of the Company as of December  31, 1994  includes the  Predecessors  and Process
Solutions  which  was  acquired  on  December  30,  1994,   except  for  certain
international  operations of the TI process systems business which were acquired
by the Company in the second quarter of 1995.  Historical  results of operations
and balance sheet data for 1998,  1997,  and 1996 include the  Predecessors  and
Process  Solutions.   The  financial  information  has  been  derived  from  the
historical  financial  statements of the Predecessors  and the Company.  Erudite
Software was acquired on May 22, 1996 through a merger. The merger was accounted
for by using the pooling of interests  method.  Accordingly  the  Company's  and
Predecessors'   financial  statements  have  been  restated  to  include,  on  a
historical cost basis,  the accounts and operations of Erudite  Software for all
periods  presented.  The Company disposed of substantially  all of the assets of
Erudite  Software as of April 30, 1998. In November 1998, the Company  completed
the sale of certain  assets related to activities of its Oil & Gas business unit
("O&G"), effective as of October 30, 1998. The balance sheet data of the Company
as of December 31, 1997  includes the  operations  of Ryan which was acquired by
Power Systems as of December 1, 1997.  The statement of operations  data for the
year ended  December 31, 1997 includes the activity of Ryan from the date of its
acquisition.

<PAGE>

For information and disclosures  regarding the Company's business segments,  see
Note 17 to the Consolidated Financial Statements.

<TABLE>
<CAPTION>

                               Predecessors        Company
                                  Jan. 1           Apr. 14
                                  through          through                   
                                 April 13,       December 31,                            Year Ended December 31,
                                   1994             1994               1995              1996               1997               1998

                                                        (in thousands, except per share data)
                              -----------------------------------------------------------------------------------------------------
<S>                           <C>               <C>               <C>               <C>               <C>               <C>  
Statement of Operations Data:
Revenues                      $    14,659       $    37,085       $    96,060       $    96,033       $    79,711       $    73,718 
Cost of revenue                    10,380            27,932            65,592            63,679            58,326            49,814
                              -----------       -----------       -----------       -----------       -----------       -----------
     Gross profit                   4,279             9,153            30,468            32,354            21,385            24,004 
Operating expenses:
     Selling, general and 
           administrative           2,628             6,313            21,815            24,192            27,320            20,345
Depreciation and 
           amorization                420             1,125             2,341             2,111             2,368             1,768
     Business combination costs       -                 -                 -               1,206               -                 -   
     Employee severance and   
         terminations costs           -                 -                 -                 -               1,124               -  
                              -----------       -----------      ------------       -----------       -----------      ------------ 
Total operating expenses            3,048             7,438            24,156            27,509            30,812            22,113
                              -----------       -----------      ------------       -----------       -----------      ------------
     Operating income (loss)        1,231             1,715             6,312             4,845            (9,427)            1,891
Gain on sale of assets                                                                                                          550 
Interest expense                      (41)             (402)             (983)             (387)             (765)             (350)
Other (expense) income, net            43               192               364               394            (1,228)              326
                              -----------       -----------      ------------       -----------       -----------      ------------
Income (loss) before income 
     taxes                          1,233             1,505             5,693             4,852           (11,420)            2,417
Provision (benefit) for 
     income taxes                     678               552             2,017               709            (2,717)            1,020
                              -----------       -----------      ------------       -----------       -----------      ------------
Net income (loss)             $       555       $       953      $      3,676       $     4,143       $    (8,703)     $      1,397
                              ===========       ===========      ============       ===========       ===========      ============
Earnings (loss) per 
     common share
             - Basic                            $      0.26      $       0.91       $      0.82       $     (1.72)     $       0.28
                                                ===========      ============       ===========       ===========      ============
             - Diluted                          $      0.26      $       0.91       $      0.82       $     (1.72)     $       0.27
                                                ===========      ============       ===========       ===========      ============ 
Weighted average common
     shares outstanding                               
             - Basic                                  3,341             4,049             5,066             5,066             5,066
                                                ===========      ============       ===========       ===========      ============
             - Diluted                                3,341             4,059             5,073             5,066             5,107
                                                ===========      ============       ===========       ===========      ============

                                  As of                                       As of December 31, 
                                 Apr. 13,       -----------------------------------------------------------------------------------
                                   1994             1994             1995              1996              1997               1998 
   
Working capital               $      (434)      $     1,269      $     16,077       $    13,867       $     1,646      $      4,058
Total assets                       35,655            42,312            54,688            51,006            48,362            48,743 
Long-term liabilities              15,570            15,783             6,055             2,580             2,369             3,350
Series A Preferred Stock             -                2,400              -                 -                 -                 -
Stockholders' equity (deficit)     (2,563)           (4,229)           20,532            24,693            15,924            17,089

</TABLE>

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
  
ITEM 7. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS.
        -------------
      Results of Operations.

     The following  table sets forth the results of  operations  for the periods
presented expressed in thousands of dollars and as a percentage of revenues.
<TABLE>
<CAPTION>
                                                                       Year ended December 31,
                                               --------------------------------------------------------------------- 
            
<S>                                           <C>           <C>       <C>         <C>          <C>         <C>
                                                 1998          %         1997          %          1996         %
                                                 ----         ---        ----         ---         ----        ---
Contract revenue                             $ 73,818       100.0%   $ 79,711       100.0%   $  96,033      100.0%
Cost of revenue                                49,814        67.5%     58,326        73.2%      63,679       66.3%
                                            ---------       ------   --------      -------   ---------      ------
Gross profit                                   24,004        32.5%     21,385        26.8%      32,354       33.7%
Operating Expenses:
   Selling, general and administrative         20,345        27.6%     27,320        34.3%      24,192       25.2%
   Depreciation and amortization                1,768         2.4%      2,368         3.0%       2,111        2.2%
   Business combination costs                    -            -           -           -          1,206        1.3%
   Employee severance and termination costs      -            -         1,124         1.4%        -           -  
                                            ---------      -------   --------      -------   ---------      ------  
Total operating expenses                       22,113        30.0%     30,812        38.7%      27,509       28.6%
                                            ---------      -------   --------      -------   ---------      ------
Operating income (loss)                         1,891         2.6%     (9,427)      -11.8%       4,845        5.0%

Gain on  sale of assets                           550         0.7%       -            -           -           -
Interest expense                                 (350)       -0.5%       (765)       -1.0%        (387)      -0.4%
Other income (expense)                            326         0.4%     (1,228)       -1.5%         394        0.4%
                                            ---------      -------   --------      -------   ---------      ------       
Income (loss) before income taxes               2,417         3.3%    (11,420)      -14.3%       4,852        5.0%
 
Provision for (benefit from) taxes              1,020         1.4%     (2,717)       -3.4%         709        0.7%
                                            ----------     -------   ---------     -------   ----------     ------
Net income (loss)                             $ 1,397         1.9%   $ (8,703)      -10.9%   $   4,143        4.3%
                                             =========     =======   =========     =======   ==========     ======
</TABLE>
<PAGE>

Comparison of 1998 to 1997.

     Contract  Revenue.  Total  contract  revenue  was $73.8  million  and $79.7
million for the years ended December 31, 1998 and 1997, respectively.  This $5.9
million (7.4%) decrease in revenue was primarily attributable to the disposition
of  substantially  all of the assets of its  wholly  owned  subsidiary,  Erudite
Software, and the disposition of certain assets related to activities of O&G, as
previously  disclosed.  Revenue of $5.3  million and $18.0  million from Erudite
Software are included in 1998 and 1997, respectively and revenue of $1.1 million
and $2.3 million from O&G are included in 1998 and 1997, respectively.

     Revenue  from its two core  businesses,  operated  through  the Process and
Power business  units,  increased in 1998.  The Process  business unit increased
revenue by $1.7 million to $36.5  million in 1998 from $34.8 million in 1997, or
4.9%,  due to increases in customer  orders.  The Power  business unit increased
revenue by $6.4 million to $30.9  million in 1998 from $24.5 million in 1997, or
26.1%  primarily  due to revenues  generated by its domestic  service  contracts
resulting from the acquisition of Ryan, as previously  disclosed,  and increases
in customer orders.

     The majority of the Company's revenues are from fixed price contracts.  Any
unexpected costs or  unanticipated  delays in connection with the performance of
fixed priced contracts could adversely affect the Company's financial results.

     International sales were approximately $35 million or 47% of total revenues
in 1998 and $29.1 million or 36.5% of total  revenues in 1997, an increase which
reflects   increases  in  the  core   businesses.   The  Company   expects  that
international  sales will  continue to  represent a  significant  portion of its
total revenues.  The Company  currently sells products and services to customers
in emerging market economies such as Russia,  Ukraine,  Bulgaria,  and the Czech
Republic, as well as customers in countries whose economies have suffered in the
recent Asian  financial  crisis.  The  Company's  international  operations  are
subject to various risks, including exposure to currency fluctuation, regulatory
requirements,  political and economic  instability and trade  restrictions.  The
Company has taken steps to reduce these  risks,  particularly  risks  associated
with doing business in emerging markets,  but there can be no assurance that the
above  mentioned  risk  factors will not have a material  adverse  affect on the
Company's business, financial condition or results of operations.

     Gross  Profit.  Gross profit  increased to $24.0 million in 1998 from $21.4
million  in 1997,  or 12.2%,  primarily  due to  increased  customer  orders and
improved  margins in the core  businesses,  and the  disposition of unprofitable
businesses. Gross profit percentage was 32.5% in 1998 compared to 26.8% in 1997,
reflecting  improved  margins  in the core  businesses  and the  disposition  of
unprofitable businesses.

     Selling,  General  and  Administrative   Expenses.   Selling,  general  and
administrative expenses decreased to $20.3 million, or 27.6% of revenues, during
the year ended December 31, 1998 from $27.3 million, or 34.3% of revenue, during
the  corresponding  period in 1997.  The  decrease in these  expenses in 1998 is
attributable to the disposition of unprofitable  businesses,  reduced facilities
costs in 1998 due to the relocation of the primary  offices of the Company,  and
the  continuing  cost  containment  efforts  previously  disclosed,  as  well as
increased  costs in 1997 for  professional  services  related  to a  lawsuit,  a
reserve of  $600,000  recorded to reduce  certain  Korean  receivables  to their
estimated  realizable value as a result of the Asian financial crisis, and costs
of $852,000 associated primarily with the future lease commitments on the unused
portion of the former  Columbia,  Maryland leased facility for which the Company
will derive no future benefit.

     Gross research and product  development  expenditures were $4.3 million and
$5.1  million for the years  ended  December  31,  1998 and 1997,  respectively.
Capitalized  software  development  costs totaled $2.3 million and $3.5 million,
during the years ended  December 31, 1998 and 1997,  respectively.  Net research
and development costs included in selling,  general and administrative  expenses
were $2.1 million and $1.6 million  during the years ended December 31, 1998 and
1997, respectively. The Company continued investing in the conversion of its D/3
DCS(TM) product to the Microsoft  Windows NT(R) platform and the  productization
of its SimSuite(TM) software tools.

     Employee Severance and Termination Costs. The Company recorded a net charge
for  severance  and  other  employee  obligations  of  $1.1  million  in 1997 in
connection  with cost  reduction  efforts  initiated  to offset  the impact of a
decrease in contract  revenues.  Of this  charge,  $976,000  was  expended as of
December 31, 1997 and the remaining balance was expended in 1998.

     Depreciation  and  Amortization.  Depreciation  expense  amounted  to  $1.2
million  and $2.1  million  during the years ended  December  31, 1998 and 1997,
respectively.  This decrease was primarily  attributable  to the  disposition of
assets included in the Erudite Software and O&G sales.

     Amortization  of goodwill and  intangibles was $365,000 and $219,000 during
the  years  ended  December  31,  1998 and  1997,  respectively.  This  increase
primarily  resulted from the amortization of certain  intangible assets acquired
as a result of the acquisition of Ryan in December of 1997.

     Operating Income (Loss). Operating income amounted to $1.9 million, or 2.6%
of revenues,  and operating  (loss)  amounted to ($9.4)  million,  or (11.8%) of
revenues, during the years ended December 31, 1998 and 1997, respectively.  This
significant   increase  in  operating   income   reflects  the   disposition  of
unprofitable  businesses,  increases in customer  orders,  improved  margins and
reduced  selling,  general  and  administrative  expenses in 1998 as compared to
1997.
 
     Gain on sale of assets.  Gain on sale of assets  reflects  the net  pre-tax
gain realized on the disposition of the Erudite Software and the O&G assets,  as
previously  disclosed.  In the third quarter of 1998,  the Company  recognized a
($5.0) million  pre-tax loss on the  disposition  of the O&G assets.  During the
second quarter,  the Company  recorded a gain of $5.6 million on the sale of the
Erudite Software assets.  These sales and related gains and losses are described
more fully under Note 3, Disposal of Assets - "Notes to  Consolidated  Financial
Statements",  "Liquidity and Capital Resources",  below and by the provisions of
the asset  purchase  agreements  for such  transactions,  have  been  previously
disclosed and are incorporated herein by reference.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Interest  Expense.  Interest  expense  decreased  to  $350,000 in 1998 from
$765,000 in 1997.  This  decrease is  attributable  primarily  to a  significant
decrease in the Company's  borrowings  under its lines of credit made during the
period to fund working capital requirements.

     Other  Income  (Expense).  Other income  amounted to $326,000 in 1998,  and
other expenses  amounted to $1.2 million in 1997,  resulting almost  exclusively
from recognized  foreign exchange gains in 1998 and recognized  foreign exchange
losses in 1997 from the Company's Asian operations.

     Provision for (Benefit from) Income Taxes. The Company's effective tax rate
amounted to 42.2% in 1998.  The  difference  between the statutory U.S. tax rate
and the  Company's  effective  tax rate for 1998 is primarily  the result of the
effects of foreign  operations at different tax rates,  state income taxes,  and
other  non-deductible  expenses  reflected in the  calculation  of  the 1998 tax
provision.  Due to the loss  experienced in 1997,  the Company  recognized a tax
benefit of $2.7 million.

     Comparison of 1997 to 1996.

     Contract  Revenue.  Total  contract  revenue  was $79.7  million  and $96.0
million for the years ended December 31, 1997 and 1996, respectively. This $16.3
million (17%)  decrease in revenue was primarily  attributable  to a significant
decrease in power plant  simulation  revenue,  resulting  from the conclusion of
several full-scope nuclear power plant simulation  projects in the first half of
1997,  and a decrease in third party  hardware  sales by the Company's  Business
Systems unit,  which  decreases were only partially  offset by a 12% increase in
the domestic revenue of the Company's Process  business.  The Company as a whole
continued its transition  towards smaller and  shorter-term  projects that often
include licenses of the Company's proprietary tools.

     Revenues from fixed price  contracts  constitute  approximately  90% of the
Company's revenues for the past three years.

     International  sales  were  approximately  $29.1  million or 36.5% of total
revenues  in 1997 and  $48.2  million  or 50.2% of  total  revenues  in 1996,  a
decrease which  reflected the  significant  reduction in power plant  simulation
revenue  in 1997.  This  decrease  notwithstanding,  the  Company  expects  that
international  sales will  continue to  represent a  significant  portion of its
total revenues.  The Company  currently sells products and services to customers
in emerging market economies such as Russia,  Ukraine,  Bulgaria,  and the Czech
Republic, as well as customers in countries whose economies have suffered in the
recent Asian  financial  crisis.  The  Company's  international  operations  are
subject to various risks, including exposure to currency fluctuation, regulatory
requirements,  political and economic  instability and trade  restrictions.  The
Company has taken steps to reduce these  risks,  particularly  risks  associated
with doing business in emerging markets,  but there can be no assurance that the
above  mentioned  risk  factors will not have a material  adverse  affect on the
Company's business, financial condition or results of operations.

     Gross  Profit.  Gross profit  decreased to $21.4 million in 1997 from $32.4
million in 1996, a decline of 33.9%,  primarily due to lower revenues  generated
by power plant simulation  contracts.  Gross profit percentage was 26.8% in 1997
compared  to  33.7% in  1996,  reflecting  a  higher  percentage  of  government
contract-related  revenues in the power simulation  business with  corresponding
lower margins,  an increase to the  amortization of software  development  costs
capitalized,  lower labor utilization  within the Business Systems unit, as well
as reserves taken against certain contracts in 1997.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Selling,  General  and  Administrative   Expenses.   Selling,  general  and
administrative expenses increased to $27.3 million, or 34.3% of revenues, during
the year ended  December  31,  1997 from $24.2  million,  or 25.2% of  revenues,
during the corresponding  period in 1996. The increase in these expenses in 1997
consisted of increased sales and marketing costs,  primarily within the Business
Systems unit, increased recruiting and relocation costs, and increased costs for
professional  services related to a lawsuit referred to in Part I, Item 3. Legal
Proceedings, in the 1997 10-K. Additionally, the increase reflected a reserve of
$600,000  recorded  to reduce  certain  Korean  receivables  to their  estimated
realizable  value as a result  of the  Asian  financial  crisis.  In the  fourth
quarter  of  1997,  the  Company  also  recorded  costs of  $852,000  associated
primarily with the future lease  commitments on the unused portion of the former
Columbia,  Maryland leased facility for which the Company would derive no future
benefit.

     Gross research and product  development  expenditures were $5.1 million and
$5.8  million for the years  ended  December  31,  1997 and 1996,  respectively.
Capitalized  software  development  costs totaled $3.5 million and $3.9 million,
during the years ended  December 31, 1997 and 1996,  respectively.  Net research
and  development  costs  expensed  and  included  within  selling,  general  and
administrative  expenses  were $1.6  million and $1.9  million  during the years
ended December 31, 1997 and 1996, respectively.  The Company continued investing
in the  conversion  of its D/3 DCS(TM)  product to the  Microsoft  Windows NT(R)
platform,  enhancement  of its S/3 SCADA(TM)  System for the  Microsoft  Windows
NT(R) platform and the productization of its SimSuite(TM) software tools.

     Employee Severance and Termination Costs. The Company recorded a net charge
for severance and other employee  obligations of $1.1 million in connection with
cost reduction  efforts initiated to offset the impact of a decrease in contract
revenues. Of this charge, $976,000 had been expended as of December 31,1997.

     Depreciation  and  Amortization.  Depreciation  expense  amounted  to  $2.1
million  and $1.9  million  during the years ended  December  31, 1997 and 1996,
respectively. This increase was attributable to higher capital expenditures made
in 1997 and 1996.

     Amortization  of goodwill and  intangibles was $219,000 and $168,000 during
the years ended December 31, 1997 and 1996, respectively. This increase resulted
from amortization of certain  intangible assets which were fully amortized as of
December 31, 1997.

     Business  Combination Costs. In 1996, business combination costs related to
the acquisition of Erudite  Software,  which  consisted  primarily of consulting
fees, legal and accounting  expenses,  and  compensation  expense for the shares
issued to employees by the owners of Erudite Software pursuant to stock transfer
agreements, amounted to approximately $1.2 million and were charged to operating
expenses.

     Operating  (Loss)  Income.  Operating loss amounted to ($9.4)  million,  or
(11.8%) of revenues,  and operating  income  amounted to $4.9 million,  or 5% of
revenues, during the years ended December 31, 1997 and 1996, respectively.  This
significant  decrease in operating income reflected the reduction in margin from
power  plant  simulation  projects,  increased  sales  and  marketing  costs and
employee severance and termination costs as well as several other fourth quarter
adjustments. See Note 18 of "Notes to Consolidated Financial Statements".

     Interest  Expense.  Interest  expense  increased  to  $765,000 in 1997 from
$387,000 in 1996.  This  increase was  attributable  primarily to a  significant
increase in the Company's  borrowings  under its lines of credit made during the
period to fund working capital requirements.

     Other Income  (Expense).  Other expenses  amounted to $1.2 million in 1997,
resulting  almost  exclusively  from recognized  foreign  exchange losses of the
Company's Asian operations.  During 1996, $394,000 in interest income was earned
from  short-term  investments of excess cash during the year as well as proceeds
from the sale of an equity interest in a joint venture.

     (Benefit from) Provision for Income Taxes.  Due to the loss  experienced in
1997,  the Company  recognized  a tax benefit of $2.7 million as compared to the
tax  provision  of  $709,000  recognized  in 1996.  The  effective  tax rate was
different  in  1997  as a  result  of  reductions  in  the  valuation  allowance
recognized as income by the Company in 1996.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Liquidity and Capital Resources.

     The Company has funded its activities primarily from borrowings under lines
of credit.  In 1998,  the  Company's  operating  activities  used cash  totaling
approximately $30,000, primarily related to the 1998 net income of $1.4 million,
together with increases in current assets and decreases to current  liabilities,
partially offset by non-cash items such as depreciation,  amortization, the gain
on the sale of assets and deferred income taxes.  Management believes that it is
more likely  than not that the net  deferred  tax asset at December  31, 1998 is
recoverable.  For the year ended  December 31,  1997,  the  Company's  operating
activities used cash of  approximately  $3.8 million.  At December 31, 1998, the
Company had cash and cash equivalents of $2.2 million compared to $334,000 as of
December 31, 1997.

     The Company  generated  approximately  $4.6 million in cash from  investing
activities, made up primarily of $9.0 million from the sale of assets, which was
partially offset by $2.3 million of capitalized  software  development costs and
$2.1 million of capital expenditures.

     The Company's financing activities used cash of approximately $2.6 million,
consisting  primarily of $2.3 million in repayments under the Company's lines of
credit.

     The Company maintains,  through its subsidiaries,  two lines of credit that
have been extended through June 30, 1999, based on modification agreements dated
January 1, 1999. These lines of credit, which are cross-collateralized,  provide
for  borrowing  up to a total of $8.0  million  to  support  foreign  letters of
credit,  margin  requirements or foreign exchange  contracts and working capital
needs.  The  first  line,  for  $7.0  million,  used by Power  Systems,  is 90%
guaranteed  by  the  Export-Import  Bank  of  the  United  States  ("EXIM"),  is
collateralized by substantially  all of Power Systems' assets,  and provides for
borrowings up to 90% of eligible  receivables  and 50% of unbilled  receivables.
The continuation of this line is conditional based upon the Company's  obtaining
an extension on the EXIM  guarantee  through at least June 30, 1999. The Company
has received preliminary approval from EXIM to extend the EXIM guarantee,  which
expires  April  30,  1999,  through  March  31,  2000.  Under  the  terms of the
preliminary approval,  the Power Systems' line would be reduced to $6 million in
connection  with such an extension of the  guarantee.  The second line, for $1.0
million,  used by Process  Solutions,  is collateralized by substantially all of
Process  Solutions'  assets,  and provides  for  borrowing up to 85% of eligible
receivables.  Both lines are  guaranteed  by the Company and  collateralized  by
substantially all of the Company's assets.

     The lines require the Company to comply with certain  financial  ratios and
preclude  the  Company  from paying  dividends  and making  acquisitions  beyond
certain  limits  without the bank's  consent.  In connection  with the extension
obtained  as of January  1, 1999,  certain  of these  covenants  were  modified,
retroactive  to  December  31,  1998.  The Company  was in  compliance  with all
modified covenants at December 31, 1998 and expects to maintain  compliance with
the covenants through maturity.

     The Company has received a commitment  letter from a financial  institution
to provide a new credit  facility with a maturity date of March 31, 2000,  which
the Company  expects to finalize by April 30, 1999.  The terms and conditions of
the new facility, which would provide for a $6 million Power Systems' line and a
$3 million Process  Solutions' line, are  substantially  the same as the current
facility,  including the  requirement  for the EXIM guarantee and the guarantees
described below.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     In connection with the aforementioned  existing lines of credit and the new
facility,  the Company has arranged for certain guaranties to be provided to the
bank on its behalf by GP Strategies  and ManTech.  As previously  disclosed,  in
consideration for the above-mentioned  guaranties,  the Company has granted each
of ManTech and GP Strategies warrants to purchase shares of the Company's common
stock;  each of such  warrants  provide the right to  purchase at least  150,000
shares of the  Company's  common  stock at $2.375 per  share.  The  Company  has
recognized  $300,000  as the  estimated  fair  value  of  such  warrants  in the
consolidated financial statements.  During 1998, the Company recognized $180,000
of expense related to these warrants.  The Company will expense the remainder of
the fair value over the term of the guaranties.

     Although the Company intends to replace its expiring credit facilities,  as
described  above,  there  can  be no  assurance  that  such  financing  will  be
completed.  In the event  that the  Company  is  unsuccessful  in  extending  or
obtaining  new lines of credit,  GP  Strategies  and ManTech each have agreed to
provide  working  capital  support of up to $1.8  million  ($3.6  million in the
aggregate) to the Company.

     Management  believes  that the above  actions  will  result  in  sufficient
liquidity and working capital  resources  necessary in 1999 for planned business
operations,   debt  service   requirements,   planned  investments  and  capital
expenditures.

     In November 1998, the Company  completed the sale of certain assets related
to  activities  of its Oil & Gas business  unit  ("O&G"),  to Valmet  Automation
(USA), Inc. ("Valmet"), pursuant to an asset purchase agreement, effective as of
October  30,  1998,  by and  between the  Company,  and Valmet.  The Company has
recognized a loss before income taxes on this transaction,  in the quarter ended
September  30,  1998,  of $5.0  million.  In  connection  with the sale of these
assets,  the Company has written off  approximately  $2.9 million in capitalized
software  development  costs,  since  all  operations  that  would  support  the
recoverability  of these costs have been sold.  The  write-off of these costs is
reflected  in the  calculation  of the loss on the sale.  The  Company  received
approximately  $742,000  in cash,  subject  to certain  adjustments,  and Valmet
assumed certain  identified  liabilities.  Valmet  purchased  assets with a book
value of approximately $3.0 million.

     The  agreement  with  Valmet  further   stipulates  that,  subject  to  the
occurrence  of certain  events,  the  Company is entitled  to  royalties  over a
five-year period relative to certain software of the Company, which was licensed
to Valmet. Such royalties would not exceed $1 million in the aggregate and would
be  recorded as earned.  The Company is liable for any cost  overruns on certain
development  and project  contracts,  beyond  estimates  stipulated in the asset
purchase agreement,  such liabilities not to exceed $800,000. In addition to the
$800,000  overrun  liability,   the  Company  remains  responsible  for  certain
liabilities not assumed by Valmet,  including certain  liabilities unknown as of
the date of closing.  The Company has accrued  $400,000 and included such amount
in the loss  recognized  on this  transaction,  based on a present  estimate  of
exposure relative to these liabilities.  The foregoing description of the Valmet
asset  purchase  agreement is qualified in its entirety by the full text of such
agreement,  which was included as an exhibit to the Company's report on Form 8-K
dated November 30, 1998, and is  incorporated  herein by reference.  See Note 3,
Acquisitions and Dispositions - "Notes to Consolidated Financial Statements" for
a further discussion of the sale.

     In May 1998,  the Company  completed the sale of  substantially  all of the
assets of  Erudite  Software  to Keane,  Inc.  ("Keane"),  pursuant  to an asset
purchase  agreement,  dated as of April 30,  1998,  by and  among  the  Company,
Erudite  Software and Keane.  The purchase price for the Erudite Software assets
was $9.9  million  ($8.9  million  in cash and  $1.0  million  in the form of an
unsecured promissory note due on April 30, 1999, subject to certain adjustments)
plus  the  assumption  by  Keane  of  certain  operating   liabilities  totaling
approximately  $2.2  million.  Net  cash  proceeds  to be  received  in  1998 in
connection with the sale of Erudite Software,  including  transaction  costs, is
estimated at $4.1 million,  after reducing  outstanding debt as described below.
The foregoing  description of the Keane asset purchase agreement is qualified in
its  entirety by the full text of the such  agreement,  which was included as an
exhibit to the  Company's  Form 10-Q for the quarter ended March 31, 1998 and is
incorporated  herein by reference.  See Note 3,  Acquisitions and Dispositions -
"Notes to Consolidated  Financial  Statements"  for a further  discussion of the
sale.

     The  Company's  additional  commitments  as of December 31, 1998  consisted
primarily  of leases on its  headquarters  and other  facilities.  Further,  the
performance  of certain  of the  Company's  customer  contracts  are  secured by
performance guaranties,  amounting to $258,000, and letters of credit, amounting
to $803,000, as of December 31, 1998, furnished by its subsidiaries'  respective
former parent  organizations in accordance with the agreement among ManTech,  GP
Strategies,  GPC,  SGLG,  Vattenfall  and the Company  dated April 13, 1994 (the
"Formation  Agreement")  and  letters of credit  amounting  to  $803,000,  as of
December 31,  1998.  Letters of credit are issued by the Company in the ordinary
course of business through commercial banks as required by certain contracts and
proposal requirements.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

Year 2000

     General.  The Company is aware of general industry  concerns  regarding the
Year 2000 problem.  The Year 2000 problem  concerns the inability of information
systems to properly  recognize  and process  date-sensitive  information  beyond
January 1, 2000. The Company has  established a compliance  program  intended to
bring its software and systems into Year 2000 compliance in time to minimize any
significant detrimental effects on operations. This program covers Company's own
products and installed base,  significant  vendors and customers,  and financial
and administrative systems. The Company's program recognizes that date-sensitive
systems  may fail at  different  points  in time  depending  on their  function.
Systems  having  forward-looking  planning  and  production  functions  may fail
earlier and require corrective  actions sooner to allow for reasonable  testing.
Other applications may fail only during the transition to Year 2000. The Company
plans to utilize  internal  personnel,  contractors and vendors to identify Year
2000 noncompliance  problems,  modify code and test the  modifications.  In some
cases, non-compliant software and hardware will be replaced.

     Current  Product  Offerings.  The Company  believes that it has  identified
substantially  all potential Year 2000 problems with the current versions of the
software  products it develops and markets.  However,  management  also believes
that it is not possible to determine with complete  certainty that all Year 2000
problems  affecting the  Company's  software  products  have been  identified or
corrected due to complexity of these  products and the fact that these  products
interact  with other third  party  vendor  products  and  integrate  on computer
systems  which  are not under  the  Company's  control.  The  Company's  program
includes the testing and, if necessary,  the modification of new versions of its
products to ensure Year 2000 readiness.

     Previous  Versions and  Installed  Base.  Older  versions of the  Company's
software will require  modification to work properly  through and after the Year
2000. The Company offers Year 2000 evaluation  services to its customers  having
older  systems to determine  the scope of work required to correct any problems.
The  Company's  program  also  includes the  development  of patches for certain
previous  versions  of  the  Company's  products,  which  may  be  purchased  by
customers.  However,  there can be no assurance  that such patches would correct
all Year 2000 problems in such previous versions,  and there can be no assurance
that  evaluation  services and patches will be purchased and  implemented by the
Company's customers.

     Suppliers.  The  Company  has  initiated  communications  with third  party
suppliers of the major computer system components, software, and other equipment
used,  operated,  or  maintained  by the Company to identify  and, to the extent
possible,  to resolve  issues  involving  the Year 2000  problem.  However,  the
Company  has  limited  or no  control  over the  actions  of these  third  party
suppliers.  Thus,  while the Company expects that it will be able to resolve any
significant  Year 2000  problems with these  systems,  there can be no assurance
that these  suppliers  will  resolve  any or all Year 2000  problems  with these
systems  before the  occurrence of a material  disruption to the business of the
Company or any of its customers.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

     Financial and  Administrative  Systems.  The Company also relies on various
administrative and financial applications (e.g., order processing and collection
systems)  that require  correction  to properly  handle Year 2000 dates.  In the
event one of these systems is not adequately corrected, the Company's ability to
capture, schedule and fulfill customer demands could be impaired. Likewise, if a
collection  processing  system  were to  fail,  the  Company  may not be able to
properly  apply  payments  to  customer  balances or  correctly  determine  cash
balances.  The  Company  plans to update its  primary  accounting  system in the
spring of 1999 and centrally  contolled  administrative  applications  are being
aessed and tested. Various non-centrally controlled systems are also utilized by
the  Company's  businesses.  The impact of a failure of these  systems  would be
limited to the business using the affected  system,  and then only to the extent
that  manual  or other  alternate  processes  were  not able to meet  processing
requirements.  Such an occurrence is not expected to have a significant  adverse
impact on the Company.

     Significant Customers. The Company is also dependent upon its customers for
sales  and cash  flow.  Year  2000  interruptions  in the  Company's  customers'
operations  could result in reduced  sales,  increased  inventory or  receivable
levels and cash flow  reductions.  While these events are possible,  the Company
anticipates  that its  customer  base is broad enough to minimize the affects of
such  interruptions.  The Company plans,  however,  to monitor the status of the
Company's customers as a means of determining risks and alternatives.

     Costs.  The Company  estimates that the aggregate costs to address the Year
2000 issue will not  exceed  approximately  $1.9  million in 1999.  The  Company
believes that most of the customer  related costs  associated with the Year 2000
issue would have occurred as part of its normal operations. The Company does not
track these costs separately,  and prior to 1999, the Company did not separately
budget for costs related to the Year 2000 issue. Of the amount to be expended in
1999, the Company believes that  approximately  $225,000,  primarily  related to
upgrades to internal  systems,  is incremental to normal operating costs.  While
the Company believes its efforts will provide reasonable assurance that material
disruptions to its internal  systems and installed  products will not occur, the
potential for interruption  still exists.  The Company's policy is to expense as
incurred  information system maintenance costs and to capitalize the cost of new
software  and hardware and  amortize or  depreciate  it over the assets'  useful
lives.  There can be no assurance  that the cost estimates  associated  with the
Company's  Year 2000 issues  will prove to be accurate or that the actual  costs
will not have a material  adverse effect on the Company's  business,  results of
operations or financial condition.

     Contingency Plans. The Company is currently developing contingency plans to
be implemented as part of its efforts to identify and correct Year 2000 problems
affecting its internal systems and installed products.  Depending on the systems
affected,   these  plans  could  include  accelerated  replacement  of  affected
equipment  or  software,  short  to  medium-term  use of  backup  equipment  and
software,  increased  work  hours  for  Company  personnel  or use  of  contract
personnel  to correct on an  accelerated  schedule any Year 2000  problems  that
arise or to provide manual  workarounds  for  information  systems,  and similar
approaches.  If the Company is required to  implement  any of these  contingency
plans,  it could  have a  material  adverse  effect on the  Company's  financial
condition and results of operations.

THE ABOVE DISCUSSION OF THE COMPANY'S  EFFORTS,  AND MANAGEMENT'S  EXPECTATIONS,
RELATING TO YEAR 2000 COMPLIANCE ARE FORWARD-LOOKING  STATEMENTS.  THE COMPANY'S
ABILITY TO  ACHIEVE  YEAR 2000  COMPLIANCE  AND THE LEVEL OF  INCREMENTAL  COSTS
ASSOCIATED  THEREWITH,  COULD BE ADVERSELY  IMPACTED BY, AMONG OTHER THINGS, THE
AVAILABILITY AND COST OF PROGRAMMING AND TESTING  RESOURCES,  SUPPLIERS' ABILITY
TO BRING THEIR SYSTEMS INTO YEAR 2000  COMPLIANCE,  AND  UNANTICIPATED  PROBLEMS
IDENTIFIED IN THE COMPANY'S ONGOING COMPLIANCE REVIEW.
 
<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

Foreign Exchange.

     A portion of the Company's  international sales revenue has been and may be
received in a currency other than the currency in which the expenses relating to
such revenue are paid. When necessary,  the Company manages its foreign currency
exposure  primarily by entering into foreign  currency  exchange  agreements and
purchasing foreign currency options.

     Other Matters.

               To date,  management  believes  inflation  has not had a material
          impact on the Company's operations.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.
         ----------------------------------------------------------

         Not applicable.

<PAGE> 
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.
         -------------------------------------------

INDEX TO FINANCIAL STATEMENTS

                                                                           Page
                                                                           ----
GSE Systems, Inc. and Subsidiaries
  Report of Independent Accountants........................................ F-1
  Consolidated Balance Sheets as of December 31, 1998 
          and 1997......................................................... F-2
  Consolidated Statements of Operations for the years ended
          December 31, 1998, 1997 and 1996................................. F-3
  Consolidated Statements of Comprehensive Income (Loss) for the years ended
          December 31, 1998, 1997 and 1996................................. F-4
  Consolidated Statements of Changes in Stockholders' Equity  
          for the years ended December 31, 1998, 1997 and 1996 ............ F-5
  Consolidated Statements of Cash Flows for the years ended
          December 31, 1998, 1997 and 1996................................. F-6
  Notes to Consolidated Financial Statements............................... F-7

<PAGE>

                        REPORT OF INDEPENDENT ACCOUNTANTS


     To The Board of Directors 
     and Stockholders of GSE Systems, Inc.


     In our  opinion,  the  accompanying  consolidated  balance  sheets  and the
     related consolidated statements of operations, comprehensive income (loss),
     changes  in  stockholders'  equity and cash flows  present  fairly,  in all
     material  respects,  the  financial  position of GSE Systems,  Inc. and its
     subsidiaries  as of December  31,  1998 and 1997,  and the results of their
     operations  and their cash flows for each of the three  years in the period
     ended December 31, 1998, in conformity with generally  accepted  accounting
     principles.  These  financial  statements  are  the  responsibility  of the
     Company's management;  our responsibility is to express an opinion on these
     financial  statements based on our audits. We conducted our audits of these
     statements in accordance with generally  accepted auditing  standards which
     require that we plan and perform the audit to obtain  reasonable  assurance
     about whether the financial  statements are free of material  misstatement.
     An audit  includes  examining,  on a test basis,  evidence  supporting  the
     amounts  and  disclosures  in  the  financial  statements,   assessing  the
     accounting  principles used and  significant  estimates made by management,
     and evaluating the overall  financial  statement  presentation.  We believe
     that our audits provide a reasonable basis for the opinion expressed above.



 
                                                      PricewaterhouseCoopers LLP


     McLean, Virginia
     February 24, 1999

<PAGE>

PART I - FINANCIAL INFORMATION
Item 1.  Financial Statements
                                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                                          CONSOLIDATED BALANCE SHEETS
                                (in thousands, except share and per share data)
<TABLE>
<CAPTION>
                                                      ASSETS

<S>                                                                    <C>                      <C>
                                                                                       December 31,
                                                                             1998                    1997
                                                                       -----------------        ---------------
                                                                       
Current assets:
     Cash and cash equivalents                                         $          2,240         $          334
     Contract receivables                                                        24,426                 24,371
     Note receivable                                                              1,000                   -
     Inventories                                                                  2,892                  2,700
     Prepaid expenses and other current assets                                    1,654                  1,739
     Deferred income taxes                                                          150                  2,570
                                                                       -----------------        ---------------                  
          Total current assets                                                   32,362                 31,714

Property and equipment, net                                                       2,714                  3,864
Software development costs, net                                                   4,715                  7,526
Goodwill, net                                                                     2,781                  2,974
Deferred income taxes                                                             3,366                  1,730
Other assets                                                                      2,805                    554
                                                                      -----------------        ---------------
          Total assets                                                $          48,743        $        48,362 
                                                                      =================        ===============

                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
     Lines of credit                                                 $            6,746       $          9,032
     Accounts payable                                                             8,407                  7,919
     Accrued expenses                                                             4,344                  4,304
     Obligations under capital lease                                                143                    208
     Billings in excess of revenue earned                                         6,359                  6,719
     Accrued contract and warranty reserves                                         846                    912
     Other current liabilities                                                    1,308                    661
     Income taxes payable                                                           151                    313
                                                                     ------------------       ---------------- 
          Total current liabilities                                              28,304                 30,068

Notes payable to related parties                                                    148                    185
Obligations under capital lease                                                      10                    234
Accrued contract and warranty reserves                                              596                    675
Other liabilities                                                                 2,596                  1,276 
                                                                     ------------------       ----------------
          Total liabilities                                                      31,654                 32,438 
                                                                     ------------------       ----------------
Stockholders' equity:
     Common stock $.01 par value, 8,000,000 shares authorized,
         5,065,688 shares issued and outstanding                                     50                     50
     Additional paid-in capital                                                  21,678                 21,378
     Retained earnings (deficit) - at formation                                  (5,112)                (5,112)
     Retained earnings (deficit) - since formation                                1,158                   (239)
     Accumulated other comprehensive income (loss)                                 (685)                  (153)
                                                                     ------------------       ----------------  
          Total stockholders' equity                                             17,089                 15,924
                                                                     ------------------       ---------------- 
          Total liabilities & stockholders' equity                   $           48,743       $         48,362
                                                                     ==================       ================       
</TABLE>
The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<PAGE>



                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                      (in thousands, except per share data)


<TABLE>
<CAPTION>
                                                                              Years ended December 31,
                                                                          1998            1997             1996
                                                                
<S>                                                                <C>             <C>              <C>
                                                                                 
Contract revenue                                                   $      73,818   $      79,711    $      96,033

Cost of revenue                                                           49,814          58,326           63,679
                                                                   --------------  --------------   --------------
                                                                   
Gross profit                                                              24,004          21,385           32,354
                                                                   -------------   --------------   --------------
Operating expenses
     Selling, general and administrative                                  20,345          27,320           24,192
     Depreciation and amortization                                         1,768           2,368            2,111
     Business combination costs                                                -               -            1,206
     Employee severance and termination costs                                  -           1,124                -
                                                                   --------------  --------------   --------------
Total operating expenses                                                  22,113          30,812           27,509
                                                                   --------------  --------------   --------------
                                                                   
Operating income (loss)                                                    1,891          (9,427)           4,845

Gain on sale of assets                                                       550               -                -
Interest expense                                                            (350)           (765)            (387)
Other income (expense)                                                       326          (1,228)             394
                                                                   --------------  --------------   --------------
                                                                   
Income (loss) before income taxes                                          2,417         (11,420)           4,852

Provision for (benefit from) income taxes                                  1,020          (2,717)             709
                                                                   --------------  --------------   --------------
                                                                   
Net income (loss)                                                  $       1,397   $      (8,703)   $       4,143
                                                                   ==============  ==============   ==============
                                                                   
Basic earnings (loss) per common share                                     $0.28          $(1.72)           $0.82
                                                                   ==============  ==============   ==============
                                                                   
Diluted earnings (loss) per common share                                   $0.27          $(1.72)           $0.82
                                                                   ==============  ==============   ==============
                                                                   
</TABLE>

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<PAGE>

                       GSE SYSTEMS, INC. AND SUBSIDIARIES
             CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
                                 (in thousands)

<TABLE>
<CAPTION>

                                                                              Years ended December 31,
                                                                           1998           1997              1996
<S>                                                                <C>              <C>             <C> 
Net income (loss)                                                  $       1,397    $     (8,703)   $       4,143

Other comprehensive income (loss)
     Foreign currency translation adjustment                                (532)            (66)            (341)
     Pension liability adjustment                                              -               -              102
                                                                   --------------  --------------   --------------
                                                                   
Comprehensive income (loss)                                        $         865   $      (8,769)   $       3,904
                                                                   ==============  ==============   ==============
                                                                   
</TABLE>

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<PAGE>
                      GSE SYSTEMS, INC. AND SUBSIDIARIES

           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
                                 (in thousands)
<TABLE>
<CAPTION>
                                                                     Retained Earnings
                                                                          (Deficit)   
                                                                     ----------------- 
                                        Common        Additional                                    Accumulated                  
                                         Stock         Paid-in         At          Since               Other
                                  -----------------                                                Comprehensive        
                                  Shares     Amount     Capital     Formation     Formation           Income (Loss)           Total
                                  ------     ------     -------     ---------     ---------     --------------------          -----
<S>                                <C>      <C>       <C>          <C>          <C>              <C>                      <C>
Balance, January 1, 1996           5,066    $    50   $ 21,121     $ (5,112)    $  4,321         $              152       $  20,532
Compensation expense                -           -          257         -            -                          -                257
Foreign currency                    
     translation adjustment         -           -         -            -            -                          (341)           (341)
Pension liability adjustment        -           -         -            -            -                           102             102
Net income                          -           -         -            -           4,143                       -              4,143
                                  ------     ------     -------     ---------     ---------     --------------------         ------
Balance, December 31, 1996         5,066         50     21,378       (5,112)       8,464                        (87)         24,693
Foreign currency translation        -           -         -            -            -                           (66)            (66)
Net (loss)                          -           -         -            -          (8,703)                      -             (8,703)
                                  ------     ------     -------     ---------     ---------     --------------------         ------
Balance, December 31, 1997         5,066         50     21,378       (5,112)        (239)                      (153)         15,924
Foreign currency translation        
     adjustment                     -           -         -            -           -                           (532)           (532)
Issuance of warrants                -           -         300          -           -                           -                300

Net income                          -           -         -            -           1,397                       -              1,397
                              ----------  ---------   ----------   --------     --------       ---------------------     ----------
Balance, December 31, 1998         5,066    $    50   $   21,678   $ (5,112)    $  1,158       $               (685)      $  17,089
                              ==========  =========   ==========   ========     ========       =====================     ==========
</TABLE>


The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<PAGE>
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)

<TABLE>                       
<CAPTION>
                                                                                           Years ended December 31,
                                                                                   1998              1997           1996
                                                                               -------------    -------------  ------------
<S>                                                                            <C>              <C>            <C> 
                                             
Cash flows from operating activities:
Net income (loss)                                                              $   1,397        $   (8,703)     $  4,143
Adjustments to reconcile net income (loss) to net cash
        (used in) operating activities:
     Depreciation and amortization                                                 3,492             3,492         2,747
     Accrued facility costs                                                            -               852        (1,451)
     Provision (credit) for doubtful contract receivables                           (255)              723             -
     Foreign currency transaction (gain) loss                                       (326)            1,275             -
     Fair value of warrants issued to non-employees                                  180                 -             -
     Non-cash stock compensation                                                       -                 -           257
     Deferred income taxes                                                           301            (2,277)           71
     Gain on sale of assets                                                         (550)                -             -
     Changes in assets and liabilities
        Contract receivables                                                      (2,344)            1,464         2,103
        Inventories                                                                 (185)              727        (1,245)
        Prepaid expenses and other current assets                                    178               836           355
        Other assets                                                              (1,558)              (17)         (181)
        Accounts payable and accrued expenses                                     (2,600)           (2,152)        1,399
        Accrued severance                                                              -               148             -
        Billings in excess of revenue earned                                          83               644        (6,933)
        Accrued contract and warranty reserves                                       102              (710)       (1,927)
        Other current liabilities                                                  1,655               200          (780)
        Income taxes payable                                                        (114)             (315)         (520)
        Other liabilities                                                            514                (2)           41
                                                                            -------------   ---------------  ------------
Net cash used in operating activities                                                (30)           (3,815)       (1,921)
                                                                            -------------   ---------------  ------------
     Proceeds from sale of assets                                                  8,955              (578)            -
     Capital expenditures                                                         (2,061)             (918)       (2,834)
     Capitalization of software development costs                                 (2,304)           (3,474)       (3,890)
     Proceeds from sale/leaseback transaction                                          -               521             - 
                                                                            -------------   ---------------  ------------
Net cash provided by (used in) investing activities                                4,590            (4,449)       (6,724)
                                                                            -------------   ---------------  ------------
Cash flows from financing activities:
     (Decrease) increase in lines of credit with banks                            (2,287)            6,450         2,369
     (Repayments) borrowings under capital lease obligations                        (265)             (266)          (37)
     Net repayment of amounts due from stockholders                                    -                 -          (204)
     Decrease in notes payable to related parties                                    (12)              (17)            -
                                                                            -------------   ---------------  ------------
Net cash provided by (used in) financing activities                               (2,564)            6,167         2,128
                                                                            -------------   ---------------  ------------
Effect of exchange rate changes on cash                                              (90)              (19)          (49)
                                                                            -------------   ---------------  ------------
Net increase (decrease) in cash and cash equivalents                               1,906            (2,116)       (6,566)
Cash and cash equivalents at beginning of period                                     334             2,450         9,016
                                                                            -------------   ---------------  ------------
Cash and cash equivalents at end of period                                     $   2,240     $         334    $    2,450
                                                                            =============   ===============  ============
                                                                
</TABLE>

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

1.   Business

     GSE Systems,  Inc. ("GSE Systems" or the "Company")  designs,  develops and
delivers business and technology  solutions by applying  high-technology-related
process   control,   high  fidelity   simulation,   systems  and  services  into
applications   for   worldwide   industries   including   energy   and   process
manufacturing.   The  Company's  solutions  and  services  assist  customers  in
improving  quality,  safety and throughput;  reducing  operating  expenses;  and
enhancing overall productivity. The Company was formed on April 13, 1994 through
the consolidation of operations of GSE Power Systems,  Inc. ("Power Systems" and
formerly "Simulation, Systems & Services Technologies Company" and its immediate
parent MSHI, Inc.), GP International Engineering & Simulation,  Inc. ("GPI") and
GSE Power Systems AB ("Power Systems AB" and formerly "EuroSim AB"). In December
1994 and in the second  quarter of 1995,  the Company  expanded into the process
control and data acquisition  business through the acquisition of the net assets
of the  process  control  systems  division  of Texas  Instruments  Incorporated
("TI"), which now operates as GSE Process Solutions, Inc. ("Process Solutions").
 
     The Company's  operations  are subject to certain risks and  uncertainties,
including,  among other things,  rapidly changing  technology,  risks associated
with doing business  internationally and reliance on key technical and executive
personnel.

     As discussed in Note 10, the Company's credit facilities expire on June 30,
1999. The Company has received a commitment letter from a financial  institution
to obtain a new credit  facility with a maturity  date of March 31, 2000,  which
the Company  expects to finalize by April 30, 1999.  The terms and conditions of
the new facility,  which would provide for a $6 million line of credit for Power
Systems and a $3 million line of credit for Process Solutions, are substantially
the same as the new facility,  including the  requirement for the EXIM guarantee
and the additional guarantees described in Note 10.

     Although  the Company  intends to replace its expiring  credit  facilities,
there can be no assurance that such  financing  will be completed.  In the event
that the Company is  unsuccessful in extending or obtaining new lines of credit,
GP Strategies Corporation ("GP Strategies")and ManTech International Corporation
("ManTech")  each have agreed to provide  working  capital support of up to $1.8
million ($3.6 million in the aggregate) to the Company.

2.   Summary of significant accounting policies

Principles of consolidation

     The accompanying  consolidated  financial statements include the results of
operations of the Company and its wholly-owned subsidiaries: Power Systems, GPI,
Power  Systems  AB, and Process  Solutions.  The  results of  operations  of GSE
Erudite Software, Inc. ("Erudite Software") are included through April 30, 1998.
All inter-company balances and transactions have been eliminated.

Accounting estimates

     The  preparation  of financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period. Actual results could differ from those estimates.

Cash and cash equivalents

     Cash and cash  equivalents  consist of cash on hand and  short-term  highly
liquid  investments  with  maturities  of less than three  months at the date of
purchase.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

Inventories

     Inventories  are stated at the lower of cost,  as determined by the average
cost method,  or market.  Obsolete or  unsaleable  inventory is reflected at its
estimated  net  realizable  value.  Inventory  costs  include raw  materials and
purchased parts.

     A summary of inventories is as follows (in thousands):

<TABLE>
<CAPTION>
                                             December 31,
                                        1998             1997
                                      -------          -------
<S>                                   <C>              <C>
Raw materials                         $ 1,873          $ 1,610   
Service parts                           1,019            1,090
                                      -------          -------
Total inventories                     $ 2,892          $ 2,700
                                      =======          =======
                                         
</TABLE>

Property and equipment

     Property  and  equipment  are  recorded at cost and  depreciated  using the
straight-line  method with  estimated  useful  lives  ranging  from three to ten
years.  Leasehold  improvements  are amortized over the life of the lease or the
estimated useful life,  whichever is shorter,  using the  straight-line  method.
Upon sale or retirement,  the cost and related  amortization  is eliminated from
the  respective  accounts  and  any  resulting  gain  or  loss  is  included  in
operations. Maintenance and repairs are charged to expense as incurred.

Software development costs

     Certain  computer  software   development  costs  are  capitalized  in  the
accompanying  consolidated  balance sheets.  Capitalization of computer software
development  costs begins upon the  establishment of technological  feasibility.
Capitalization  ceases and  amortization  of  capitalized  costs begins when the
software  product is  commercially  available for general  release to customers.
Amortization of capitalized  computer software  development costs is included in
cost of revenue and is provided at the greater of the amount  computed using (a)
the ratio of current  gross  revenues  for a product to the total of current and
anticipated  future  gross  revenue  or (b) the  straight-line  method  over the
remaining estimated economic life of the product, not to exceed five years.

Research and development

     Development  expenditures  incurred to meet customer  specifications  under
contracts accounted for under the percentage of completion method are charged to
contract costs.  Company  sponsored  research and development  expenditures  are
charged to  operations  as incurred  and are  included  in selling,  general and
administrative expenses. The amounts incurred for Company sponsored research and
development  activities relating to the development of new products and services
or the  improvement  of existing  products  and  services,  exclusive of amounts
capitalized,  were approximately $2,051,000,  $1,580,000, and $1,861,000 for the
years ended December 31, 1998, 1997 and 1996, respectively.

Goodwill

     Goodwill represents the excess of purchase price over the fair value of net
tangible  and  intangible  assets  acquired.  These  amounts are  amortized on a
straight-line basis over periods ranging from seven to fifteen years.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

Asset impairments

     The Company  periodically  evaluates the  recoverability  of its long-lived
assets.  This  evaluation  consists of a comparison of the carrying value of the
assets with the assets'  expected  future cash flows,  undiscounted  and without
interest costs.  Estimates of expected future cash flows represent  management's
best estimate based on reasonable and supportable  assumptions and  projections.
If the expected future cash flow,  undiscounted  and without  interest  charges,
exceeds the carrying value of the asset, no impairment is recognized. Impairment
losses are measured as the  difference  between the carrying value of long-lived
assets and their fair value.  No such  impairment  losses were incurred in 1998,
1997 or 1996.

Foreign currency translation

     Balance  sheet  accounts  for  foreign  operations  are  translated  at the
exchange  rate at the balance  sheet date,  and income  statement  accounts  are
translated  at  the  average  exchange  rate  for  the  period.   The  resulting
translation  adjustments are included in accumulated other comprehensive  income
(loss) in stockholders'  equity.  Transaction  gains and losses,  resulting from
changes in exchange  rates,  are included in  operations  in the period in which
they are occur.  For the year ended  December  31,  1998,  the foreign  currency
transaction gain, which is included in other income (expense), was approximately
$326,000.   In  1997,  the  Company  experienced  a  foreign  currency  loss  of
approximately  $1,275,000,  which  was  primarily  the  result  of  intercompany
transactions  were been negatively  impacted by the poor financial  condition of
Asian markets.  Foreign currency  transaction gains and losses were not material
in 1996.

Revenue recognition

     Revenue  under  fixed-price  contracts  generally is  accounted  for on the
percentage-of-completion  method,  based on contract  costs incurred to date and
estimated  costs to  complete.  Estimated  contract  earnings  are  reviewed and
revised  periodically  as the work  progresses and the cumulative  effect of any
change is recognized in the period in which the change is determined.  Estimated
losses are charged  against  earnings in the period such losses are  identified.
The remaining  liability for contract costs to be incurred in excess of contract
revenue is reflected as accrued contract reserves in the Company's  consolidated
balance  sheets.  Revenue  from certain  consulting  or training  contracts  are
recognized on a time and material basis. For  time-and-material  type contracts,
revenue is recognized  based on hours  incurred at a contracted  labor rate plus
expenses.

Warranties

     As  the  Company  recognizes  revenue  under  the  percentage-of-completion
method,  it provides an accrual for  estimated  future  warranty  costs based on
historical and projected claims experience.

Income taxes

     Deferred  income taxes are provided  under the asset and liability  method.
Under this method, deferred income taxes are determined based on the differences
between the financial  statement and tax basis of assets and  liabilities  using
enacted tax rates in effect for the year in which the  differences  are expected
to reverse.  Valuation  allowances  are  established  when  necessary  to reduce
deferred tax assets to the amounts  expected to be realized.  Income tax expense
consists of the  Company's  current  liability  for  federal,  state and foreign
income  taxes and the  change in the  Company's  deferred  income tax assets and
liabilities.  No provision has been made for the  undistributed  earnings of the
Company's  foreign  subsidiaries  as they are considered  permanently  invested.
Amounts of undistributed  earnings are not material to the overall  consolidated
financial statements.

Earnings per share

     Basic earnings per share is computed  based on the weighted  average number
of outstanding common shares for the period.  Diluted earnings per share adjusts
such  weighted  average  for the  potential  dilution  that could occur if stock
options,  warrants or other  convertible  securities were exercised or converted
into common stock.  Diluted earnings per share is the same as basic earnings per
share for the year ended  December  31,  1997  because the effects of such items
were anti-dilutive.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     The  number of common  shares  and  common  share  equivalents  used in the
determination of basic and diluted earnings (loss) per share was as follows:

<TABLE>
<CAPTION>
                                                                    Year ended December 31,
                                                        ------------------------------------------------
                                                            1998             1997             1996
                                                        --------------   --------------   --------------
<S>                                                     <C>              <C>              <C>
Weighted average shares outstanding - Basic                  5,065,688        5,065,688        5,065,688
                                                        ==============   ==============   ==============
                                                        
Weighted average shares outstanding - Diluted                5,107,428        5,065,688        5,073,700
                                                        ==============   ==============   ==============
</TABLE>
                                                        
     The  difference  between the amounts in 1998 and 1996  represents  dilutive
options  and/or  warrants to purchase  shares of common stock computed under the
treasury  stock  method,  using the  average  market  price  during the  related
periods.

Segment reporting

     In 1998, the Company adopted  Statement of Financial  Accounting  Standards
131,  "Disclosures about Segments of an Enterprise and Related Information." FAS
131  supersedes  FAS  14,  "Financial  Reporting  for  Segments  of  a  Business
Enterprise,"  replacing the "industry  segment  approach"  with the  "management
approach." The management approach designates the internal  organization that is
used by management for making operating  decisions and assessing  performance as
the  source  of  the  Company's  reportable  segments.  FAS  131  also  requires
disclosures  about products and services,  geographic areas and major customers.
The  adoption  of FAS 13 did not  affect  results  of  operations  or  financial
position, but did affect the disclosure of segment information.

Comprehensive income

     Statement of Financial Accounting  Standards 130, "Reporting  Comprehensive
Income" was adopted  effective  for the year ended  December 31,  1998.  FAS 130
requires  additional  reporting  with  respect to certain  changes in assets and
liabilities that previously were reported in stockholder's  equity. The 1997 and
1996 financial  statements have been  reclassified  for comparative  purposes as
required by FAS 130.

New Accounting Standards

     In June 1998 the Financial  Accounting  Standards Board issued Statement of
Financial Accounting  Standards 133, "Accounting for Derivative  Instruments and
Hedging  Activities."  This  statement  requires  that an entity  recognize  all
derivatives  as either  assets or  liabilities  in the  statement  of  financial
position  and  measure  those  instruments  at fair value.  The Company  will be
required to adopt this new  accounting  standard by January 1, 2000.  Management
does not anticipate early adoption. The Company does not believe that the effect
of the adoption of FAS 133 will be material.

Concentration of credit risk

     Financial instruments that potentially subject the Company to concentration
of credit  risk  consist  primarily  of  contract  receivables.  Credit  risk on
contract  receivables  is  mitigated  by the nature of the  Company's  worldwide
customer  base  and  its  credit  policies.  The  Company's  customers  are  not
concentrated  in any specific  geographic  region,  but are  concentrated in the
energy  and  manufacturing  industries.  No  single  customer  accounted  for  a
significant  (greater than 10%) amount of the Company's revenue during the years
ended December 31, 1998,  1997 and 1996 and there were no  significant  contract
receivables  from a single customer at December 31, 1998. The Company  typically
performs a credit  evaluation before extending credit and may require letters of
credit, bank guarantees or advance payments.  Thereafter,  the Company continues
to monitor its contract  receivables  exposure after giving effect to letters of
credit,  bank  guarantees,  the status of work  performed on contracts,  and its
customers' financial condition.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

Off balance sheet risk and foreign exchange contracts

     When necessary, the Company enters into forward exchange contracts, options
and swaps as hedges against certain foreign  currency  commitments.  The Company
also enters into letters of credit and  performance  guarantees  in the ordinary
course of business as required by certain  contracts and proposal  requirements.
The  Company  does not hold any  derivative  financial  instruments  for trading
purposes.

     Gains and losses on foreign exchange  contracts and swaps are recognized as
part of the cost of the  underlying  transactions  being hedged in the period in
which the exchange rates changed.  Foreign exchange contracts have an element of
risk that the  counterparty  may not be able to meet the terms of the agreement.
However, the Company minimizes such risk exposure by limiting  counterparties to
nationally recognized financial institutions. Foreign exchange options contracts
permit but do not require the Company to exchange foreign currencies at a future
date with  counterparties  at a contracted  exchange rate. Costs associated with
such  contracts  are  amortized  over  the  life of the  contract  matching  the
underlying receipts.

3.   Acquisitions and dispositions

Acquisitions

     On December 1, 1997, the Company  acquired 100% of the  outstanding  common
stock of J.L. Ryan,  Inc.  ("Ryan") for an initial  purchase price of $1,000,000
and contingent  consideration based on the performance of the business from 1998
to 2002;  a minimum of $250,000 of such  earnings  payments for each of 1998 and
1999 has been guaranteed by the Company.  The Company paid $600,000 in cash upon
the closing of the  transaction  and entered into a  promissory  note payable in
four annual  installments  of $100,000 each  beginning on January 2, 1999.  This
acquisition was accounted for under the purchase method.  The financial  results
of Ryan  have  been  included  in the  results  of  operations  from the date of
acquisition.  The acquisition resulted in total goodwill of $1,133,976, which is
being  amortized over seven years.  For 1998, the  contingent  consideration  in
addition to the minimum guaranteed amount was approximately $172,000,  which the
Company has recorded as an addition to goodwill.

     On May 22,  1996,  the Company  acquired all of the  outstanding  shares of
capital stock of Erudite  Software.  The acquisition was accomplished  through a
merger of Erudite  Software  into a wholly  owned  subsidiary  of the Company in
which  840,688  shares of the  Company's  Common  Stock were  exchanged  for all
outstanding  shares of capital stock of Erudite  Software.  The  acquisition was
accounted  for  using  the   pooling-of-interests   method  of  accounting   and
accordingly,  the Company's  consolidated  financial statements were restated to
include the accounts and operations of Erudite Software for all periods prior to
the merger.

Dispositions

     On November  10, 1998,  the Company  completed  the sale of certain  assets
related  to  activities  of its  Oil & Gas  business  unit  ("O&G"),  to  Valmet
Automation  (USA),  Inc.  ("Valmet"),  pursuant to an Asset Purchase  Agreement,
effective as of October 30, 1998,  by and between the Company,  and Valmet.  The
Company has  recognized a loss before income taxes on this  transaction,  in the
quarter ended  September  30, 1998, of $5.0 million,  including the write-off of
approximately $2.9 million in capitalized  software development costs, since all
operations that would support the recoverability of these capitalized costs have
been sold.  The Company  received  approximately  $742,000  in cash,  subject to
certain adjustments,  and Valmet assumed certain identified liabilities.  Valmet
purchased assets with a book value of approximately $3.0 million.  The agreement
stipulates  that,  subject to the occurrence of certain  events,  the Company is
entitled to royalties over a five-year  period  relative to certain  software of
the Company  which was licensed to Valmet.  Such  royalties  would not exceed $1
million in the aggregate and would be recorded as earned.  The Company is liable
for any cost  overruns  on certain  development  and project  contracts,  beyond
estimates  stipulated in the Asset Purchase  Agreement,  such liabilities not to
exceed $800,000. In addition to the $800,000 liability for overruns, the Company
remains  responsible for certain  liabilities not assumed by Valmet. The Company
has accrued  $400,000 and included  such amount in the loss  recognized  on this
transaction,  based  on  a  present  estimate  of  exposure  relative  to  these
liabilities.  Included in  operations  for 1998 are revenues of $1.1 million and
operating  losses of $721,000  attributable to the Oil & Gas business unit prior
to the sale to Valmet.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

    On May 1, 1998, the Company  completed the sale of substantially all of the
assets of Erudite  Software,  to Keane,  Inc.  ("Keane"),  pursuant  to an Asset
Purchase  Agreement,  dated as of April 30,  1998,  by and  among  the  Company,
Erudite Software and Keane. The aggregate  purchase price for the Erudite assets
was  approximately  $9.9  million  (consisting  of $8.9 million in cash and $1.0
million  in the form of an  unsecured  promissory  note due on April  30,  1999,
subject to certain adjustments  described in the next paragraph).  In connection
with the transaction,  Keane purchased  certain assets with a book value of $4.4
million and assumed certain operating  liabilities  totaling  approximately $2.2
million.  The Company recognized a gain before income taxes on this transaction,
of $5.6 million.  In connection  with the sale of these assets,  the Company has
written off approximately $800,000 in capitalized software development costs, as
well as $321,000 of purchased software,  since all operations that would support
the  recoverability  of these costs have been sold. The write-off of these costs
is reflected in the calculation of the gain on the sale.  Included in operations
for  1998  are  revenues  of  $5.3  million  and  operating  losses  of  $64,000
attributable to Erudite Software prior to the sale to Keane.

4.   Fair values of financial instruments

     The  carrying  amounts of cash and cash  equivalents  and  short-term  debt
approximate fair value because of the short-term  maturity of these instruments.
The carrying  amount of long-term debt  approximates  fair value based on either
market prices for the same or similar issues or the current rates offered to the
Company for similar debt of the same maturities.

5.   Contract receivables 

     Contract  receivables  represent  balances  due  from a broad  base of both
domestic and international customers. All contract receivables are considered to
be collectible within twelve months. The components of contract  receivables are
as follows (in thousands):


<TABLE>
<CAPTION>

                                                                  December 31,
                                                               -------------------  
                                                                 1998         1997
<S>                                                            <C>          <C>   
                                                               ---------    ---------
Billed receivables                                             $  16,469    $  16,994
Recoverable costs and accrued profit -  not billed                 8,839        8,398
Allowance for doubtful accounts                                     (882)      (1,021)
                                                               ---------    ---------                                              

Total contract receivables                                     $  24,426    $  24,371
                                                               =========    =========
                                                                  
</TABLE>

     Recoverable  costs and accrued profit,  not billed represent costs incurred
and associated profit accrued on contracts that will become billable upon future
milestones or completion of contracts.

     Revisions in estimated  contract  costs at completion  are reflected in the
period during  which facts and circumstances  necessitating  such a change first
become  known.  The effect of changes in  estimates  of contract  profits was to
decrease  gross profit by  approximately  $45,000 during the year ended December
31, 1998, decrease gross profit by approximately  $410,000 during the year ended
December 31, 1997,  and to increase  gross  profit by  approximately  $1,900,000
during the year ended December 31, 1996.


6. Property and equipment

   Property and equipment consists of the following (in thousands):

<TABLE>
<CAPTION>
                                                                           December 31,
                                                                      1998            1997
                                                                     ------          -------
<S>                                                                  <C>             <C> 
Computer equipment                                                   $ 6,399         $ 7,771

Leasehold improvements                                                 1,085           1,889

Furniture and fixtures                                                 2,134           1,652
                                                                     --------        --------           
                                                                       9,618          11,312

Accumulated depreciation and amortization                             (6,904)         (7,448)

                                                                     --------        --------
      Property and equipment, net                                    $ 2,714         $ 3,864
                                                                     ========        ========
</TABLE>
     
     Depreciation  and  amortization  expense  was  $1,218,000,  $2,149,000  and
$1,943,000 for the years ended December 31, 1998, 1997 and 1996 respectively.

     The Company has $404,000 and $962,000 in assets held under capital lease as
of December 31, 1998 and 1997,  respectively.  Accumulated amortization on these
assets was $142,000 and $384,000 as of December 31,1998 and 1997, respectively.

7.  Software development costs

    Software development costs, net, consist of the following (in thousands):

<TABLE>
<CAPTION>
                                                                           December 31,

                                                                       1998           1997
                                                                  ------------    ------------     
<S>                                                               <C>             <C>     
Capitalized software development costs                             $    7,407       $   9,028

Accumulated amortization                                               (2,692)         (1,502)

                                                                  ------------    ------------
      Software development costs, net                              $    4,715       $   7,526
                                                                  ============    ============

</TABLE>

     Software  development  costs  capitalized were  $2,304,000,  $3,474,000 and
$3,890,000 for the years ended December 31, 1998,  1997 and 1996,  respectively.
Amortization of software development costs capitalized,  excluding write-offs in
connection with asset dispositions, was $1,900,000,  $1,124,000 and $635,000 for
the years ended December 31, 1998, 1997 and 1996, respectively, and are included
in cost of revenue.

8.Goodwill

     Goodwill consists of the following (in thousands):

<TABLE>
<CAPTION>
                                                                           December 31,
 
                                                                       1998            1997
                                                                  -------------  -------------  
<S>                                                                <C>           <C>   
Goodwill, at cost                                                  $     3,731   $      3,559

Accumulated amortization                                                  (950)          (585)

                                                                  -------------  -------------
      Goodwill, net                                                $     2,781   $      2,974
                                                                  =============  =============
</TABLE>

     Amortization expense for goodwill was approximately $365,000,  $219,000 and
$168,000 for the years ended December 31, 1998, 1997 and 1996, respectively.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

9. Accrued expenses

Accrued expenses consist of the following (in thousands):


<TABLE>
<CAPTION>    

                                                                           December 31,

                                                                      1998           1997
                                                                  -------------  -------------
<S>                                                               <C>            <C> 
Accrued vacation, severance and other benefits                     $      872    $     1,771

Accrued compensation and payroll taxes                                  1,204          1,260

Accrued reserves, dispositions                                            926           -

Othere accrued expenses                                                 1,342          1,273   
                                                                  -------------  -------------
      Total                                                       $     4,344    $     4,304
                                                                  =============  =============
</TABLE>

10.  Notes payable and financing arrangements

Notes  payable  and  financing   arrangements   consist  of  the  following  (in
thousands):

<TABLE>
<CAPTION>
                                                                           December 31,

                                                                        1998       1997
                                                                    -----------  ----------
<S>                                                                 <C>          <C>

Lines of credit with bank                                           $    6,746      $ 9,032

Notes payable to related parties                                           174          185

Notes payable, other                                                     1,760          -

Obligations under sales-type lease                                       1,680          -

Capital lease obligations                                                  153          442
                                                                  -------------  -----------

      Total notes payable and financing arrangements                    10,513        9,659


Less amounts payable within one year                                    (8,530)      (9,240)

                                                                  -------------  -----------
      Long-term portion                                             $     1,983     $    419
                                                                  =============  ===========
</TABLE>

Lines of Credit

     The Company maintains,  through its subsidiaries,  two lines of credit that
have been extended through June 30, 1999, based on modification agreements dated
January 1, 1999. These lines of credit, which are cross-collateralized,  provide
for  borrowings  up to a total of $8.0  million  to support  foreign  letters of
credit,  margin  requirements or foreign exchange  contracts and working capital
needs. The first line, for $7.0 million, used by Power, is 90% guaranteed by the
Export-Import  Bank  of  the  United  States  ("EXIM"),   is  collateralized  by
substantially  all of Power's  assets,  and provides for borrowings up to 90% of
eligible receivables and 50% of unbilled receivables. The extension of this line
is  conditional  based upon the  Company's  obtaining  an  extension on the EXIM
guarantee  through at least June 30, 1999. The Company has received  preliminary
approval from EXIM to extend the EXIM guarantee,  which currently expires  April
30, 1999,  through March 31, 2000. Under the terms of the preliminary  approval,
the Power line will be reduced to $6 million,  when the approval  becomes final.
The second  line,  for $1.0  million,  used by  Process,  is  collateralized  by
substantially  all of Process'  assets,  and provides for borrowing up to 85% of
eligible   receivables.   Both  lines  are   guaranteed   by  the   Company  and
collateralized by substatnially all of the Company's assets.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     The lines require the Company to comply with certain  financial  ratios and
preclude  the  Company  from paying  dividends  and making  acquisitions  beyond
certain  limits  without the bank's  consent.  In connection  with the extension
obtained  as of January  1, 1999,  certain  of these  covenants  were  modified,
retroactive  to  December  31,  1998.  The Company  was in  compliance  with all
modified covenants at December 31, 1998 and expects to maintain  compliance with
the covenants.

     The Company has received a commitment  letter from a financial  institution
for a new credit  facility  with a maturity  date of March 31,  2000,  which the
Company  expects to finalize by April 30, 1999.  The terms and conditions of the
new  facility,  which would provide for a $6 million Power Systems line and a $3
million  Process  Solutions  line,  are  substantially  the same as the existing
facility,  including the  requirement  for the EXIM guarantee and the guarantees
described below.

     In connection with the aforementioned  existing lines of credit and the new
facility,  the Company has arranged for certain guaranties to be provided on its
behalf  to the bank by GP  Strategies  and  ManTech.  In  consideration  for the
above-mentioned  guaranties,  the  Company  has  granted  each of ManTech and GP
Strategies  warrants to purchase shares of the Company's  common stock;  each of
such  warrants  provides  the right to purchase at least  150,000  shares of the
Company's common stock at $2.375 per share. The Company has recognized  $300,000
as the  estimated  fair value of such  warrants  in the  consolidated  financial
statements.  During 1998, the Company recognized  $180,000 of expense related to
these  warrants.  The Company will expense the  remainder of the fair value over
the term of the guarantees.  The fair value of the warrants was determined using
the Black - Scholes valuation model. Assumptions used in the calculation were as
follows:dividend  yield of 0%, expected  volatility of 61%,  risk-free  interest
rates of 5.6% and expected terms of 2.5 years.

     Although the Company intends to replace its expiring credit facilities,  as
described  above,  there  can  be no  assurance  that  such  financing  will  be
completed.  In the event  that the  Company  is  unsuccessful  in  extending  or
obtaining  new lines of credit,  GP  Strategies  and ManTech each have agreed to
provide  working  capital  support of up to $1.8  million  ($3.6  million in the
aggregate) to the Company.

Obligations under sales-type lease
 
    In December 1998,  the Company  entered into a contract with a customer for
the lease of certain  hardware and software under a 36-month lease.  The Company
has accounted for this lease as a sales-type  lease. The current position of the
net  investment  in  sales-type  lease is in prepaid  expenses and other current
assets,  while  the  non-current  portion  is  included  in  other  assets.  The
components  of the  net  investment  in  sales-type  lease  are as  follows  (in
thousands):

<TABLE>
<CAPTION>

<S>                                     <C>
Minimum rentals receivable              $  1,994
less: unearned interest income              (314)
                                        ----------
Net investment in sales-type lease      $  1,680
                                        ==========
</TABLE>

Minimum rental receivable under this lease at December 31, 1998 are as follows
(in thousands):

<TABLE>
<CAPTION>

<S>                                     <C>
1999                                    $   720 
2000                                        640
2001                                        634
                                        ----------
Total                                   $ 1,994         
                                        ==========
</TABLE>

     The  $1,680,000  obligation  related  to this  lease is  included  in other
current liabilities and other liabilities.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

Notes payable, other

     Notes payable,  other includes notes related to acquisitions and insurance,
which are included in other current liabilities and other liabilities.

Other debt

     The Company  entered  into  capital  lease  agreements  for  furniture  and
equipment,  totaling  $58,000,  $102,000,  and  $313,000  during the years ended
December 31, 1998, 1997 and 1996, respectively.  These obligations bear interest
at between 9% and 11% per annum and expire between 1998 and 2000.

Debt maturities

     Aggregate maturities of debt as of December 31, 1998 are as follows:  

<TABLE>
<CAPTION>

<S>                                     <C>
1999                                    $  8,530 
2000                                       1,110
2001                                         700
2002                                          30
Thereafter                                    40
                                       ----------
Total                                   $ 10,513         
                                       ==========
</TABLE>

11.   Income taxes

     The  consolidated  (loss) income before income tax, by domestic and foreign
sources, is as follows (in thousands):


<TABLE>
<CAPTION>
                                       Years ended December 31,
                                  ------------------------------------
                                     1998         1997         1996   
                                  ---------    ----------   ----------
<S>                               <C>          <C>          <C> 
Domestic                          $   1,379    $   (8,850)  $    3,884
Foreign                               1,038        (2,570)         968       
                                  ---------    ----------   ----------
     Total                        $   2,417    $  (11,420)  $    4,852
                                  =========    ==========   ==========  
</TABLE>




The provision for (benefit from) income taxes is as follows (in thousands):

<TABLE>

                                         Years ended December 31,
                                  ------------------------------------
                                     1998         1997         1996   
                                  ---------    ----------   ----------
<S>                               <C>          <C>          <C> 
Current:
   Federal                        $    -      $       (27)  $      (23)
   State                                157          -              29  
   Foreign                              257          (413)         642       
                                  ---------    ----------   ----------
                                  $     414    $     (440)  $      648
                                  ---------    ----------   ---------- 
Deferred:
   Federal                              556        (2,388)         186         
   State                               -             (229)          23        
   Foreign                               50           340         (148)
                                  ---------    ----------   ----------
                                        606        (2,277)          61
                                  ---------    ----------   ----------   
                                  $   1,020    $   (2,717)  $      709
                                  =========    ==========   ==========
</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     The  (benefit  from)  provision  for income taxes varies from the amount of
income tax determined by applying the applicable U.S.  statutory rate to pre-tax
(loss) income as a result of the following:
  
<TABLE>
<CAPTION>
                                                               
                                                                       Years ended December 31,
                                                         --------------------------------------------------
                                                             1998              1997               1996
                                                         ------------      ------------       ------------
<S>                                                              <C>             <C>                  <C>
Statutory U.S. tax rate                                          34.0 %           (34.0)%             34.0 %

State income tax, net of federal tax benefit                      2.7              (2.7)               2.7

Effect of foreign operations                                     (2.2)              3.8               (6.6)

Change in valuation allowance                                    (0.8)              7.8              (19.5)

Non-deductible amortization expense related to warrants           2.7              -                 -

Others                                                            5.8               1.3                4.0
                                                         ------------      ------------       ------------
Effective tax rate                                               42.2 %           (23.8)%             14.6 %
                                                         ============      ============       ============
</TABLE>
<PAGE>

                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATD FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     At December 31, 1998, the Company had available  $11,854,000 of foreign and
domestic net operating loss carryforwards which expire between 2007 and 2017. In
addition,  the Company had  $338,000 of foreign tax credit  carryforwards  which
expire  between 2000 and 2001.  These  carryforwards  will be utilized to reduce
taxable income in subsequent  years. A portion of the net operating  losses were
generated by certain of the  Predecessors  prior to the formation of the Company
and, as a result,  there are  limitations on the amounts that can be utilized to
offset taxable income in a given year.

     Deferred  income  taxes arise from  temporary  differences  between the tax
basis of assets and  liabilities  and their  reported  amounts in the  financial
statements.  A  summary  of the tax  effect  of the  significant  components  of
deferred income taxes is as follows (in thousands):

 <TABLE>
<CAPTION>                                                           
                                                             December 31,
                                                       ------------------------   
                                                       1998                1997
                                                       ----                ----   
                                                             Deferred tax
                                                       ------------------------   
                                                           Asset (Liability)
                                                       ------------------------   
<S>                                                    <C>            <C>   
Contract loss reserves                                 $      48      $      46

Property and equipment                                       340            135

Accrued expenses                                             164            207

Net operating loss carryforwards                           4,945          7,152

Book reserves not deductible for tax purposes                876            458

Book income deducted for tax purposes                       (645)           -

Software development costs                                (1,731)        (2,762)

Cash to accrual adjustment                                   (58)           (71)

Foreign tax credits                                          338            338

Others                                                       297           (125)
                                                        --------        -------   
                                                           4,574          5,378

Valuation allowance                                       (1,058)        (1,078)
 
                                                        --------        -------
Total                                                 $    3,516      $   4,300
                                                        ========        =======
</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     During 1996, the Company reduced the valuation allowance by $1,033,000,  of
which  $109,000  reduced  goodwill  and  other  intangibles  arising  out of the
acquisition of Power Systems.  The valuation  allowance at December 31, 1998 and
1997 primarily  relates to the future  utilization of foreign net operating loss
carryforwards  and foreign tax credits that the Company has  determined  are not
realizable  at this time.  Management  believes  that it is more likely than not
that the net deferred tax asset as of December 31, 1998 is realizable.

12.   Capital stock

     As of December 31, 1998, the Company had 10,000,000 total shares of capital
stock  authorized,  of which  8,000,000  are  common  stock  and  2,000,000  are
preferred  stock.  As of  December  31,  1998 and  1997,  there are no shares of
preferred  stock  outstanding.  The  Board of  Directors  has the  authority  to
establish one or more classes of preferred  stock and to  determine,  within any
class of preferred stock, the preferences, rights and other terms of such class.

13.   Stock options

Long term incentive plan

     During 1995, the Company  established  the 1995 Long-Term  Incentive  Stock
Option Plan (the  "Plan"),  which  includes  all  officers,  key  employees  and
non-employee  members  of the  Company's  Board of  Directors.  All  options  to
purchase  shares of the  Company's  common stock under the Plan expire ten years
from the date of grant and generally  become  exercisable in three  installments
with 40% vesting on the first  anniversary  of the grant date and 30% vesting on
each of the  second  and third  anniversaries  of the  grant  date,  subject  to
acceleration under certain circumstances.  Under the original terms of the Plan,
the Company had  reserved  425,000  shares of common stock for issuance of stock
options,  which amount was increased to 625,000  shares in 1996 by action of the
Company's directors and stockholders.

     Upon a determination in 1997 by the executive and  compensation  committees
of the  Company's  Board of Directors  that the purposes of the  Company's  1995
Long-Term  Incentive  Plan  were no  longer  being  met  with  respect  to those
individuals holding nonstatutory stock options with exercise prices greater than
the then-current market value of the Company's Common Stock, the Company offered
certain employees and  non-management  directors who were holders of outstanding
options  under the 1995  Long-Term  Incentive  Plan as of  December  1, 1997 the
opportunity  to  exchange  such  options  for  replacement  stock  options at an
exercise  price of $3.875  per share,  the fair  market  value of the  Company's
Common Stock at the close of business on that date. Each option holder accepting
such offer was required to surrender  his or her existing  option and enter into
new stock option agreements  whereby each option's  three-phased  vesting period
(40% vested as of the first  anniversary of the date of grant,  70% vested as of
the second  anniversary  of the date of grant,  and 100%  vested as of the third
anniversary of the date of grant) would  re-commence as of December 1, 1997, the
new date of grant.  A total of 84  individuals  were eligible to  participate in
this  replacement of options,  and those  individuals'  existing  options had an
average  exercise  price of $13.26 per share prior to the  replacement.  Of such
individuals, 81 participated in the replacement of options, representing a total
of 295,837  options which are included in the stock option activity table as new
options granted and options cancelled.

     In November of 1998, the Company amended the Plan such that the term of any
future  options  granted  would be seven  years and that upon  termination,  the
option  holder  would have 90 days in which to  exercise  options.  Prior to the
amendment,  the term of  options  granted  was ten years and there  were no time
frames related to termination.

     Stock option activity under the plan is as follows:

<TABLE>
<CAPTION>

                                                                          Year Ended December 31,
                                            ------------------------------------------------------------------------------------
                                                        1998                       1997                          1996
                                            -----------------------     -------------------------      -------------------------
                                                         Weighted                      Weighted                       Weighted
                                                          Average                       Average                        Average
                                                         Exercise                      Exercise                       Exercise 
                                               Shares      Price          Shares         Price           Shares         Price
                                             ---------  -----------     ---------     -----------      ---------     -----------
<S>                                           <C>       <C>             <C>           <C>                <C>          <C>     
Options outstanding, beginning of period      595,015   $    6.89       413,366       $   13.61          297,516      $  14.00

Options canceled                             (246,009)      (4.77)     (306,044)         (11.57)         (26,150)       (14.07)

Options granted                               186,200        2.79       487,693            4.12          142,000         12.89
                                              -------   ----------      ---------     -----------      ---------     -----------
Options outstanding, end of period            535,206   $    5.93       595,015       $    6.89          413,366      $  13.61
                                              =======   ==========      =========     ===========      =========     ===========

</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     The Company  accounts for grants under the Plan in accordance  with APB 25,
"Accounting  for Stock Issued to Employees,"  and related  interpretations.  Had
compensation  expense been determined based on the fair value at the grant dates
for awards under the Plan  consistent  with the method of SFAS 123,  "Accounting
for Stock Based  Compensation,"  the  Company's  net income (loss) and basic and
diluted  net income  (loss) per share  would have been  reduced  (increased)  to
approximately  $ 900,000 ($0.18 per share),  $(10,276,000)  ($(2.03) per share),
and $3,601,000  ($0. 71 per share) for the years ended  December 31, 1998,  1997
and 1996, respectively.

     The fair value of each  option is  estimated  on the date of grant  using a
Black-Scholes   option-pricing   model  with  the   following   weighted-average
assumptions  used for grants during the years ended December 31, 1998, 1997  and
1996,  respectively:  dividend yield of 0%, expected  volatility of 61% for 1998
and 80% for 1997 and 1996,  and risk-free  interest rates of 6.51%,  6.31%,  and
6.15%, and expected terms of 6 years.

     As of December 31, 1998, 1997  and 1996, respectively,  there were 215,080,
86,442,  and 119,000 stock options  exercisable  under the Plan, and the Company
had 89,294 shares of common stock reserved for the future grants under the Plan.
The weighted  average fair value of options  granted during 1998,  1997 and 1996
was $2.79 per share,  $3.00 per share and $9.55 per share,  respectively.  As of
December  31, 1998,  the  weighted  average  remaining  contractual  life of the
options outstanding was approximately 7 years.

     In 1998,  the Company  granted  stock  options to two  directors to acquire
50,000  shares of Common stock in the  aggregate at an exercise  price or $2.25.
Each such director has agreed that he would not exercise his option with respect
to more than 12,500 shares until such time as stockholder approval is obtained.

     In 1997, the Company granted one of its senior executives a stock option to
acquire 25,000 shares of Common Stock at an exercise price of $11.25. This grant
was not made pursuant to the Plan.  This option  expires ten years from the date
of grant and becomes  exercisable in the three  installments with 40% vesting on
the first anniversary of the date of grant and 30% vesting on each of the second
and third anniversaries of the date of grant.

     In 1996, in exchange for services, the Company granted stock options to two
consultants  to acquire  10,000  shares of Common  Stock in the  aggregate at an
exercise price of $14.00. These grants were not made pursuant to the Plan. These
options expire on December 31, 2000 and became  exercisable in two  installments
with 50%  vesting  as of  January 1, 1997 and the  remaining  50%  vesting as of
January 1, 1998.

14.   Commitments and contingencies

Leases

     The Company is obligated under certain  noncancelable  operating leases for
office   facilities   and   equipment.   Future  minimum  lease  payments  under
noncancelable  operating  leases as of December  31, 1998 are  approximately  as
follows (in thousands):

<TABLE>
<CAPTION>


          <S>                           <C>
          
          1999                          $    1,993
          2000                               1,851
          2001                               1,608                 
          2002                               1,230
          2003                               1,196
          Thereafter                         5,845
                                        -----------
          Total                         $   13,723
                                        ===========
</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     The  future   minimum  lease   payments   above  include   $1,142,000   for
noncancellable  leases  entered  during the first  quarter  of 1999.  Total rent
expense under operating  leases was $2,134,000,  $3,220,000,  and $1,876,000 for
the years ended December 31, 1998, 1997 and 1996.

     During 1998, the Company entered into agreements  whereby the lease for its
existing  Columbia facility was terminated and the operations that occupied such
facility were relocated into two separate facilities. One of these facilities is
in Columbia,  Maryland (approximately 53,000 square feet) and is occupied by the
operations  of Power  Systems,  as well  the  Company's  corporate  headquarters
offices and support  functions.  The other  facility is in  Baltimore,  Maryland
(approximately  33,000 square feet) and is occupied by the operations of Process
Solutions.  During  the  first  quarter  of 1999,  the  Company  has  leased  an
additional 6,000 square feet in the Baltimore  facility.  Each of the leases for
these smaller facilities has a term of ten (10) years.

Letters of credit

     As of December 31, 1998, the Company and certain of its  subsidiaries  were
contingently  liable under letters of credit  totaling  $803,000.  Further,  the
performance of certain of the Company's  customer contracts is collateralized by
performance guarantees totaling $258,000 by its subsidiaries'  respective former
parent organizations.  During 1998, the Company placed approximately $332,000 in
escrow as a performance bond deposit in connection with a simulator  contract in
Taiwan.  Of this  amount,  approximately  $221,000  will be held in escrow until
April 30, 2000 and approximately $111,000 will be held in escrow until April 30,
2003. In connection  with that same contract,  the Company placed  approximately
$180,000  in a letter of credit for payment  bond,  which will be held in escrow
until April 30, 2000.

Contingencies

     Various actions and proceedings are presently  pending to which the Company
is a party.  In the opinion of management,  the aggregate  liabilities,  if any,
arising from such actions are not expected to have a material  adverse effect on
the financial position, results of operations or cash flows of the Company.

15.   Related party transactions

     In 1997,  a  subsidiary  of the Company  entered  into  certain  agreements
regarding  the  formation  of a joint  venture  with a company  organized in the
People's  Republic of China.  In connection with the initial  capitalization  of
this joint venture,  each of ManTech and GP Strategies made advances of $126,000
on behalf of the Company.  During  1998,  ManTech  assumed  control of the joint
venture.  The operations of this joint venture were immaterial  during the years
ended December 31, 1998 and 1997.

     During 1997, ManTech entered into arrangements for the consulting  services
of a member of the  Company's  finance  staff.  Payments to the Company for such
services were $92,000 for the year ended December 31, 1997.

     A subsidiary  of the Company  subleased  office  space to ManTech  based on
square  footage  used  through May of 1998.  . For the years ended  December 31,
1998,  1997 and 1996,  such charges  amounted to $30,000,  $117,000 and $67,000,
respectively.


16.   Employee benefits

     The  Company  has  a  qualified  defined   contribution  plan  that  covers
substantially  all employees under Section 401(k) of the Internal  Revenue Code.
Under this plan, the Company's  stipulated basic contribution  matches a portion
of the participants' contributions based upon a defined schedule.  Contributions
are  invested  by an  independent  investment  company in one or more of several
investment  alternatives.  The  choice  of  investment  alternatives  is at  the
election of each participating employee. The Company's contributions to the plan
were approximately $468,000, $524,000, and $671,000 for the years ended December
31, 1998, 1997 and 1996, respectively.

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

     During  1997,  the Company  recorded a net charge for  severance  and other
employee  obligations of $1.1 million in connection with cost reduction  efforts
initiated  to offset the  impact of a decrease  in  contract  revenues.  Of this
charge,  $976,000 was expended as of December 31, 1997, with the remainder being
expended in 1998.

17.   Segment Information

     In 1998, GSE adopted FAS 131. The prior years' segment information has been
restated to present GSE's two reportable  segments,  Process and Power, its core
business units.

     The accounting  policies of the segments are the same as those described in
the  "Summary of  Significant  Accounting  Policies".  The Company is  primarily
organized on the basis of these two business units. GSE Systems has a wide range
of knowledge of control and simulation  systems and the processes  those systems
are  intended  to  improve,  control  and  model.  The  Company's  knowledge  is
concentrated  heavily in the process  industries,  which include the  chemicals,
food & beverage, and pharmaceuticals  fields, as well as in the power generation
industry.  The Process Business Unit is primarily engaged in process control and
simulation in a variety of commercial industries. Contracts typically range from
three to nine months. The Power Business Unit is primarily engaged in simulation
to the power generation  industry,  with the vast majority of customers being in
the nuclear power  industry.  Contracts  typically range from 18 months to three
years or longer.

     GSE evaluates the  performance  of its business units  utilizing  "Business
Unit  Contribution",  which  is  substantially  equivalent  to  earnings  before
interest  and taxes  (EBIT)  before  allocating  any  corporate  expenses to the
business units.

     The segment  information  regarding the two divested businesses is included
in "All Other" (See Note 3).

     The table below presents information about reported segments:

<TABLE>
<CAPTION>

                                             (in thousands)
                                        Years ended December 31,
                                 --------------------------------------
                                                   1998
                                 --------------------------------------
                                   Process        Power         Total
<S>                                <C>            <C>         <C>
Contract revenue                   $ 36,484      $ 30,930     $  67,414                                        
                                 ==========     =========     =========
Business unit contribution         $  3,444      $  4,535     $   7,979
                                 ==========     =========     =========  
</TABLE>

<TABLE>
<CAPTION>
                                                   1997
                                 --------------------------------------
                                   Process        Power         Total
<S>                                <C>            <C>         <C>
Contract revenue                   $ 34,837      $ 24,552     $  59,389                                        
                                 ==========     =========     =========
Business unit contribution         $  3,480      $    718     $   4,198
                                 ==========     =========     =========
</TABLE>

<TABLE>
<CAPTION>

                                                   1996
                                 --------------------------------------
                                   Process        Power         Total
<S>                                <C>            <C>         <C>
Contract revenue                   $ 32,145      $ 42,558     $  74,703                                        
                                 ==========     =========     =========
Business unit contribution         $  3,353      $  9,218     $  12,571
                                 ==========     =========     =========
</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998
   
     A  reconciliation  of segment  contract  revenue to  consolidated  contract
revenue and segment  business unit  contribution  to  consolidate  income before
taxes for the years ended December 31, 1998, 1997 and 1996 is as follows:

<TABLE>
<CAPTION>

                                             (in thousands)
                                        Years ended December 31,
                                 --------------------------------------
                                     1998          1997         1996
                                 ----------     ---------     ---------
<S>                                <C>            <C>         <C>
Total segment sales                $ 67,414      $ 59,389     $  74,703                                        
All other                             6,404        20,322        21,330
                                 ----------     ---------     ---------
     Consolidated contract         $ 73,818      $ 79,711     $  96,033
        revenue                  ==========     =========     =========  
</TABLE>

<TABLE>
<CAPTION>
                                           
<S>                                <C>            <C>         <C>
Segment business unit              $ 7,979       $  4,198     $  12,571                                        
     contribution
All other business unit               (491)        (4,848)       (1,781)
     contribution
Corporate expenses                  (5,271)        (8,881)       (5,551)
Severance cost                         -           (1,124)          -           
Gain on sales of assets                550            -             -
Interest expense                      (350)          (765)         (387)
                                  ----------     ---------    ----------
     Consolidated income (loss)   $  2,417       $(11,420)    $   4,852
        before taxes              ==========     =========    ==========  
</TABLE>

The Company designs,  develops and delivers business and technology solutions to
the energy, process and manufacturning industries worldwide.  Revenue, operating
income and  identifiable  assets for the Company's  United States,  European and
Asian operations are as follows (in thousands):

<TABLE>
<CAPTION>
                                                    Year Ended December 31, 1998
                         ----------------------------------------------------------------------------------               
                         United States        Europe           Asia        Eliminations        Consolidated   
                         -------------       --------        --------      ------------        ------------
<S>                      <C>                 <C>             <C>           <C>                 <C>
Revenue                  $  62,689           $  8,241        $  2,888      $    -              $   73,818     
Transfers between 
  geographic locations   $   1,761           $    423        $   -         $  (2,184)          $     -    
                         -------------       --------        --------      ------------        ------------ 
Total revenue            $  64,450           $  8,664        $  2,888      $  (2,184)          $   73,818
                         -------------       --------        --------      ------------        ------------
Gain or (Loss) from      
  operations             $   1,571           $    592        $   (272)     $    -              $    1,891
                         =============       ========        ========      ============        ============ 
Identifiable assets      $  50,904           $  5,836        $    953      $  (8,950)          $   48,743
                         =============       ========        ========      ============        ============

</TABLE>

<TABLE>
<CAPTION>
                                                    Year Ended December 31, 1997
                         ----------------------------------------------------------------------------------               
                         United States        Europe           Asia        Eliminations        Consolidated   
                         -------------       --------        --------      ------------        ------------
<S>                      <C>                 <C>             <C>           <C>                 <C>
Revenue                  $  70,580           $  5,907        $  3,224      $    -              $   79,711     
Transfers between 
  geographic locations   $   1,582           $   -           $  1,314      $  (2,896)          $     -     
                         -------------       --------        --------      ------------        ------------
Total revenue            $  72,162           $  5,907        $  4,538      $  (2,896)          $   79,711
                         -------------       --------        --------      ------------        ------------
Gain or (Loss) from      
  operations             $  (6,930)          $   (324)       $ (2,173)     $    -              $   (9,427) 
                         =============       ========        ========      ============        ============
Identifiable assets      $  50,296           $  3,686        $  2,111      $  (7,731)          $   48,362
                         =============       ========        ========      ============        ============

</TABLE>

<TABLE>
<CAPTION>
                                                    Year Ended December 31, 1996
                         ----------------------------------------------------------------------------------               
                         United States        Europe           Asia        Eliminations        Consolidated   
                         -------------       --------        --------      ------------        ------------
<S>                      <C>                 <C>             <C>           <C>                 <C>
Revenue                  $  83,263           $  9,026        $  3,744      $    -              $   96,033     
Transfers between 
  geographic locations   $     659           $   -           $    622      $  (1,281)          $     -   
                         -------------       --------        --------      ------------        ------------       
Total revenue            $  83,922           $  9,026        $  4,366      $  (1,281)          $   96,033
                         -------------       --------        --------      ------------        ------------
Gain or (Loss) from      
  operations             $   3,832           $  1,267        $   (452)     $     198           $    4,845 
                         =============       ========        ========      ============        ============
Identifiable assets      $  54,584           $  6,416        $  3,057      $ (13,051)          $   51,006
                         =============       ========        ========      ============        ============

</TABLE>

<PAGE>
          
                       GSE SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               DECEMBER 31, 1998

Domestic  and  export  sales  from the  Company's  United  States  operation  in
thousands of dollars and as a percentage of revenue as follows:

<TABLE>
<CAPTION>

                                                                       Year Ended December 31,
                                           ------------------------------------------------------------------------------------
                                                    1998                       1997                          1996
                                           -----------------------     -------------------------      -------------------------
                                             
                                             
<S>                                         <C>           <C>            <C>            <C>              <C>           <C>     
Domestic                                    $  38,860     62.0%          $  50,783      72.0%            $  47,868     57.5%
Export:
     Germany                                      661      1.1%              2,791       4.0%                9,236     11.1%
     Remaining Western Europe                   1,642      2.6%              1,748       2.5%                2,806      3.4% 
     Russia                                     4,749      7.6%              6,074       8.6%                7,716      9.3%   
     Remaining Easter Europe                   12,222     19.5%              6,481       9.2%               11,070     13.3%     
     Asia                                       2,828      3.6%              1,278       1.8%                3,910      4.7%
     South America and others                   2,273      3.6%              1,425       2.0%                  657      0.8%
                                            ---------    ------          ---------     ------            ---------    ------
                                            $  62,689    100.0%          $  70,580     100.0%            $  83,263    100.0%   
                                            =========    ======          =========     ======            =========    ======

</TABLE>

18.  Supplemental disclosure of cash flow information (in thousands):

<TABLE>
<CAPTION>

                                                      Year Ended December 31,
                                                 -------------------------------
                                                  1998         1997        1996
                                                 
                                              
                                             
<S>                                              <C>          <C>        <C>         
Non cash investing & financing activities:         
     Obligations under capital leases            $   58       $  102      $  313    
                                                 ======       ======      ======   
Execution of investment in sales-type leases     $1,680       $  -        $  -
                                                 ======       ======      ======   
Notes payable to related party for
     investment in joint venture                 $  -         $  252      $  -
                                                 ======       ======      ======  

Asset acquisitions financed with debt to seller:
     Cash paid                                   $  130       $  600      $  -
     Note payable issued                            250          900         -
                                                 ------       ------      ------  
     Total purchase price                        $  380       $1,500      $  - 
                                                 ======       ======      ====== 
Cash Paid:                         
     Interest                                    $  350       $  741      $  228
                                                 ======       ======      ======
     Income taxes                                $  426       $  233      $  285
                                                 ======       ======      ======  
</TABLE>

<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

ITEM 9.  CHANGES  IN  AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
         FINANCIAL DISCLOSURE. 
         -------------------- 
 None.

                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998


                                    PART III


The  information  required  in  response  to Items  10,  11, 12 and 13 is hereby
incorporated  by reference to the  information  under the captions  "Election of
Directors",  "Principal  Executive  Officers  of the  Company  Who Are Not  Also
Directors",   "Executive   Compensation",   "Voting   Securities  and  Principal
Stockholders",   "Security  Ownership  of  Management",   and  "Certain  Related
Transactions"  in the Proxy  Statement for the Company's  1999 Annual Meeting of
Stockholders.


<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
                                                           
                                     PART IV


ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.
         ----------------------------------------------------------------

(a)(1)   List of Financial Statements

         The following financial statements are included in Item 8:

   GSE Systems, Inc. and Subsidiaries
  
     Report of Independent Accountants
     
     Consolidated Balance Sheets as of December 31, 1998 and 1997
  
     Consolidated  Statements  of  Operations  for the years ended  December 31,
          1998, 1997 and 1996

     Consolidated Statements of Comprehensive  Income (Loss) for the years ended
          December 31, 1998, 1997 and 1996
  
     Consolidated  Statements of Changes in  Stockholders'  Equity for the years
          ended December 31, 1998 and 1997 and 1996
     
     Consolidated  Statements  of Cash Flows for the years  ended  December  31,
          1998, 1997 and 1996
  
     Notes to Consolidated Financial Statements

(a)(2)   List of Schedules

     All other schedules to the consolidated financial statements are omitted as
the required information is either inapplicable or presented in the consolidated
financial statements or related notes.

(a)(3)   List of Exhibits

     The Exhibits which are filed with this report or which are  incorporated by
reference are set forth in the Exhibit Index hereto.

(b)   Reports on Form 8-K:

1.   On April 17, 1998,  the Company  filed a Report on Form 8-K dated April 14,
     1998 with respect to a press release of the Company  announcing the signing
     a letter of intent for the sale of the Company's  Erudite Software business
     to Keane,  Inc.  The Form 8-K included as an exhibit the text of such press
     release.

2.   On  September  24,  1998,  the  Company  filed a Report  on Form 8-K  dated
     September  21,  1998  with  respect  to a  press  release  of  the  Company
     announcing the signing a letter of intent for the sale of the Company's Oil
     & Gas Business Unit to Valmet  Automation (USA), Inc. The Form 8-K included
     as an exhibit the text of such press release.

3.   On October 30, 1998,  the Company  filed a Report on Form 8-K dated October
     22,  1998 with  respect to a press  release of the Company  announcing  the
     signing a letter of intent for a proposed  transaction  involving  BatchCAD
     Limited.  The Form  8-K  included  as an  exhibit  the  text of such  press
     release.

4.   On November 30, 1998, the Company filed a Report on Form 8-K dated November
     10, 1998 providing disclosure pertaining to the Company's completion of the
     divestiture  of  certain  assets of its Oil & Gas  Business  Unit to Valmet
     Automation  (USA), Inc. This Form 8-K included as exhibits the texts of the
     Asset Purchase Agreement and the License Agreement for such transaction.

<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
                                                             
SIGNATURES
- ----------

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  registrant  has duly  caused  this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

                                   GSE Systems, Inc.

                                   By:/S/ CHRISTOPHER M. CARNAVOS
                                      ---------------------------
                                        Christopher M. Carnavos  
                                         Director and President
 
Pursuant to the  requirements of the Securities Act, this report has been signed
by the following persons in the capacities and on the dates indicated.

        Signatures                     Title                        Date
        ----------                     -----                        ----        

/S/ JEROME I. FELDMAN           Chairman of the Board            March 30, 1999
- ---------------------------
    Jerome I. Feldman     


/S/ CHRISTOPHER M. CARNAVOS     Director and President           March 30, 1999
- ---------------------------
  Christopher M. Carnavos    (Principal Executive Officer) 
                            

/S/ JEFFERY G. HOUGH          Senior Vice President              March 30, 1999
- ---------------------------          and
     Jeffery G. Hough        Chief Financial Officer    
                            (Principal Financial and
                               Accounting Officer)
/S/ SHELDON L. GLASHOW            Director                       March 30, 1999
- ---------------------------                            
     Sheldon L. Glashow


  /S/  JOHN A. MOORE, JR.           Director                     March 30, 1999
- ---------------------------                        
     John A. Moore, Jr.


<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998


  /S/  GEORGE J. PEDERSEN           Director                     March 30, 1999
- ---------------------------
    George J. Pedersen


  /S/ SYLVAN SCHEFLER
- ---------------------------         Director                     March 30, 1999
      Sylvan Schefler

<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998
                                                     
     EXHIBIT INDEX

The  following  exhibits are either  filed  herewith or have been filed with the
Securities  and  Exchange  Commission  and are referred to and  incorporated  by
reference.

Exhibit
Number       Note    Description
- -------      ----    -----------     

 2.1           (7)  Asset  Purchase  Agreement  among  GSE  Systems,  Inc.,  GSE
                    Erudite Software, Inc. and Keane, Inc. dated as of April 30,
                    1998.

 2.2         (8)    Asset  Purchase  Agreement  among  GSE  Systems,  Inc.,  GSE
                    Process  Solutions,  Inc.,  GSE Process  Solution  B.V., GSE
                    Process   Solutions  Belgium  N.V.,  GSE  Process  Solutions
                    Singapore  (Pte)  Limited and Valmet  Automation  (USA) Inc.
                    dated as of November 10, 1998.

 2.3         (8)    Software  License  Agreement  among GSE  Process  Solutions,
                    Inc., The Sage Systems  Division of Valmet  Automation (USA)
                    Inc.  and The Sage  Systems  Division  of Valmet  Automation
                    (Canada) Ltd. dated as of November 10, 1998.

 3.1         (1)    Second Amended and Restated  Certificate of Incorporation of
                    the Company.

 3.2         (2)    Form of Amended and Restated Bylaws of the Company.

 4.1         (3)    Specimen Common Stock Certificate of the Company.

10.1         (1)    Agreement among ManTech International Corporation,  National
                    Patent  Development  Corporation,  GPS  Technologies,  Inc.,
                    General Physics Corporation,  Vattenfall  Engineering AB and
                    GSE Systems, Inc. (dated as of April 13, 1994).

10.2         (9)    *    GSE Systems,  Inc. 1995  Long-Term  Incentive  Plan, as
                         amended as of November 20, 1998.

10.3         (4)    *    Form of Option  Agreement  Under the GSE Systems,  Inc.
                         1995 Long-Term Incentive Plan.

10.4         (2)    Letter  of  Credit,  Loan  and  Security  Agreement  between
                    CoreStates Bank, N.A. and GSE Process Solutions, Inc. (dated
                    as of January 31, 1995).

10.5         (4)    Amended and  Restated  Letter of Credit,  Loan and  Security
                    Agreement  between  CoreStates  Bank,  N.A.  and GSE Process
                    Solutions, Inc. (dated as of October 13, 1995 and as amended
                    as of February 23, 1996).

10.6         (4)    Letter  of  Credit,   Loan  and  Security   Agreement  among
                    CoreStates Bank, N.A., MSHI, Inc., and Simulation, Systems &
                    Services  Technologies  Company  (dated  as of  January  30,
                    1996).

10.7         (1)    Amended and Restated Lease Agreement between CCP Development
                    Limited Partnership No. 7 and Simulation, Systems & Services
                    Technologies Company (dated as of January 27, 1993)

10.8         (6)    *    Letter  Agreement  dated  January 8, 1997  between  GSE
                         Systems, Inc. and Christopher M. Carnavos

10.9         (6)    Amendment  Number  Two to  Amended  and  Restated  Letter of
                    Credit, Loan and Security Agreement between CoreStates Bank,
                    N.A. and GSE Process  Solutions,  Inc. (dated as of November
                    11, 1997)

10.11        (6)    Indemnification  Agreement between Genus Corporation and GSE
                    Power Systems, Inc. (dated as of February 2, 1998)

10.12        (6)    Office Lease Agreement  between Sterling  Rutherford  Plaza,
                    L.L.C. and GSE Systems, Inc.(dated as of February 10, 1998)

10.13        (6)    Lease  Agreement  between Red Branch  Road,  L.L.C.  and GSE
                    Systems, Inc. (dated February 10, 1998)

10.14        (6)    Letter  Agreement  dated  March 6, 1998  between  CoreStates
                    Bank, N.A. and GSE Power Systems, Inc.

10.15        (6)    Letter  Agreement  dated  March 6, 1998  between  CoreStates
                    Bank, N.A. and GSE Process Solutions, Inc.

10.16        (7)    Termination of Employment Agreement among GSE Systems, Inc.,
                    GSE Erudite Software, Inc. and Eugene D. Loveridge, dated as
                    of April 30, 1998
<PAGE>
          
                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998

10.17        (7)    Termination of Employment Agreement among GSE Systems, Inc.,
                    GSE Erudite Software, Inc. and Daniel Masterson, dated as of
                    April 30, 1998

10.18        (9)    Modification Agreement by and among GSE Power Systems, Inc.,
                    MSHI, Inc., GSE Process Solutions,  Inc,. GSE Systems, Inc.,
                    GP   International   Engineering  &  Simulation,   Inc.,  GP
                    Strategies Corporation,  ManTech International  Corporation,
                    GSE Process Solutions B.V., GSE Process Solutions  Singapore
                    (Pte) Limited, GSE Process Solutions Belgium N.V., and First
                    Union National Bank dated as of January 1, 1999.

10.19        (9)    Unconditional  Guaranty  by GSE  Systems,  Inc.  in favor of
                    First Union National Bank dated as of January 1, 1999.
               
10.20        (9)    Unconditional Guaranty by GP Strategies Corporation in favor
                    of First Union National Bank dated as of January 1, 1999.

10.21        (9)    Unconditional Guaranty by ManTech International  Corporation
                    in favor of First Union National Bank dated as of January 1,
                    1999.   

21.1         (9)    Subsidiaries fo Registrant

23.1         (9)    Consent of Independent Accountants

24.1         (9)    Power of Attorney for Dirctors' and Officers'  Signatures on
                    SEC Form 10-K

99.1         (3)    Form of Right of First Refusal Agreement

- --------------------
                    
(1)  Previously  filed  in  connection  with  the GSE  Systems,  Inc.  Form  S-1
     Registration Statement as filed with the Securities and Exchange Commission
     on April 24, 1995 and incorporated herein by reference.

(2)  Previously  filed in  connection  with  Amendment No. 1 to the GSE Systems,
     Inc.  Form S-1  Registration  Statement  as filed with the  Securities  and
     Exchange Commission on June 14, 1995 and incorporated herein by reference.

(3)  Previously  filed in  connection  with  Amendment No. 3 to the GSE Systems,
     Inc.  Form S-1  Registration  Statement  as filed with the  Securities  and
     Exchange Commission on July 24, 1995 and incorporated herein by reference.

(4)  Previously  filed in  connection  with the GSE Systems,  Inc.  Form 10-K as
     filed with the  Securities  and Exchange  Commission  on March 22, 1996 and
     incorporated herein by reference.

(5)  Previously  filed in  connection  with the GSE Systems,  Inc.  Form 10-K as
     filed with the  Securities  and Exchange  Commission  on March 31, 1997 and
     incorporated herein by reference.

(6)  Previously  filed in  connection  with the GSE Systems,  Inc.  Form 10-K as
     filed with the  Securites  and Exchange  Commission  on March 31,  1998 and
     incorporated herein by reference.

(7)  Previously  filed in  connection  with the GSE Systems,  Inc.  Form 10-Q as
     filed  with the  Securites  and  Exchange  Commission  on May 15,  1998 and
     incorporated herein by reference.

(8)  Previously filed in connection with the GSE Systems, Inc. Form 8-K as filed
     with the  Securites  and  Exchange  Commission  on  November  30,  1998 and
     incorporated herein by reference.

(9)  Filed herewith.

*  Management contract or compensatory plan.

                                                    Commission File No. 0-26494
             



                                                                    EXHIBIT 10.2

                                GSE SYSTEMS, INC.
                          1995 LONG-TERM INCENTIVE PLAN
                     (As Amended through November 20, 1998)
 

1  Definitions

     In this Plan, except where the context otherwise  indicates,  the following
definitions apply:

     1.1. "Agreement" means a written agreement implementing an Award.

     1.2.  "Award" means a grant of an Option or Right or an award of Restricted
Stock or Incentive Shares.

     1.3. "Board" means the Board of Directors of the Corporation.

     1.4. "Code" means the Internal Revenue Code of 1986, as amended.

     1.5  "Committee"  means the committee or  subcommittee of the Board meeting
the  standards  of  Rule  16b-3(d)(1)   under  the  Exchange  Act  and  Treasury
Regulations $ 1.162-27(e)(3),  or any similar  successor rule or regulation,  as
may be  appointed  by  the  Board  to  administer  the  Plan.  Unless  otherwise
determined by the Board,  the  Compensation  Committee of the Board shall be the
Committee.

     1.6.  "Common Stock" means the common stock,  par value $.01 per share,  of
the Corporation.

     1.7. "Corporation" means GSE Systems, Inc.

     1.8. "Date of Exercise"  means the date on which the  Corporation  receives
notice of the  exercise  of an Option or Right in  accordance  with the terms of
Article 9.

     1.9.  "Date of Grant" means the date on which an Option or Right is granted
or Restricted Stock or Incentive Shares are awarded under the Plan.

     1.10.  "Director"  means a member  of the Board of the  Corporation  or any
Subsidiary.

     1.11.  "Employee"  means any employee of the  Corporation  or a Subsidiary,
including  an  Employee  Director  or any  person  who has  been  hired to be an
employee of the  Corporation  or a Subsidiary,  and any consultant or advisor to
the  Corporation who is not a Director and who renders bona fide services to the
Corporation or a Subsidiary  other than services in connection with the offer or
sale of securities in a capital raising transaction.

     1.12. "Employee Director" means a Director who is also an Employee.

     1.13. "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     1.14. "Fair Market Value" means the amount equal to the closing sales price
for a Share, on the date such fair market value is to be determined (or if there
is no sale of  Shares on such  date,  the  closing  sales  price on the  nearest
trading date  preceding  such date),  in the  principal  trading  market for the
Shares as reported by such source as the Committee may select, or, if such price
quotations of the Common Stock are not then reported, then the fair market value
of a Share as  determined  by the  Committee  pursuant  to a  reasonable  method
adopted in good faith for such purpose.

     1.15. "Grantee" means an Employee to whom Restricted Stock has been awarded
pursuant  to  Article 10  or  Incentive  Shares  have been  awarded  pursuant to
Article 11.

     1.16.  "Incentive  Shares" means Shares  awarded under the Plan pursuant to
the provisions of Article 11.

     1.17.  "Incentive Stock Option" means an Option granted under the Plan that
qualifies as an incentive  stock option under  section 422  of the Code and that
the Corporation designates as such in the Agreement granting the Option.

     1.18.  "Independent  Director"  mean a "Director  who  is  not an  Employee
Director."

     1.19.  "Independent  Director Program" means that portion of the Plan under
which grants are made to Independent Directors.

     1.20.  "Nonstatutory  Stock Option" means an Option  granted under the Plan
that is not an Incentive Stock Option.

     1.21. "Option" means an option to purchase Shares granted under the Plan in
accordance with the terms of Article 6 or Article 7.

     1.22.  "Option  Period"  means the  period  during  which an Option  may be
exercised.

     1.23.  "Option  Price"  means the price per Share at which an Option may be
exercised.  The Option Price shall be  determined by the Committee and shall not
be less than the Fair Market Value  determined  as of the Date of Grant,  except
that in the  case of  Nonstatutory  Stock  Options  granted  on or  prior to the
thirtieth day after consummation of the Corporation's initial public offering of
Common  Stock (the  "IPO"),  the Option Price shall not be less than the initial
public offering price of a Share in connection with the IPO. Notwithstanding the
foregoing,  in the case of an Incentive  Stock Option granted to an Optionee who
(applying the rules of  Section 424(d)  of the Code) owns stock  possessing more
than ten percent of the total  combined  voting power of all classes of stock of
the Corporation or a Subsidiary (a "Ten-Percent Stockholder"),  the Option Price
shall not be less than one  hundred  and ten  percent  (110%) of the Fair Market
Value on the Date of Grant.

     1.24.  "Optionee"  means an Employee or Director to whom an Option or Right
has been granted.

     1.25.  "Performance  Goals"  means  performance  goals  established  by the
Committee which may be based on earnings or earnings  growth,  sales,  return on
assets, equity or investment,  regulatory  compliance,  satisfactory internal or
external audits, improvement of financial ratings,  achievement of balance sheet
or income statement objectives,  or any other objective goals established by the
Committee,  and may be  absolute  in  their  terms  or  measured  against  or in
relationship to other  companies  comparably,  similarly or otherwise  situated.
Such  performance  standards may be particular to an employee or the department,
branch,  Subsidiary or other division in which he or she works,  or may be based
on the  performance of the Corporation  generally,  and may cover such period as
may be specified by the Committee.

     1.26. "Plan" means the GSE Systems, Inc. 1995 Long Term Incentive Plan.

     1.27.  "Related  Option" means the Option in connection  with which,  or by
amendment to which, a specified Right is granted.

     1.28.  "Related  Right" means the Right granted in  connection  with, or by
amendment to, a specified Option.

     1.29.  "Restricted  Stock" means Shares  awarded under the Plan pursuant to
the provisions of Article 10.

     1.30.  "Right" means a stock  appreciation  right granted under the Plan in
accordance with the terms of


Article 8.

     1.31.  "Right  Period"  means  the  period  during  which  a  Right  may be
exercised.

     1.32.  "Rule 16b-3" means Rule 16b-3 under  Section 16  of the Exchange Act
(or any successor rule).

     1.33. "Share" means a share of Common Stock.

     1.34.  "Subsidiary"  means a corporation at least 50% of the total combined
voting  power of all  classes  of  stock  of which is owned by the  Corporation,
either directly or through one or more other Subsidiaries.

2  Purpose
   -------
          
     The Plan is  intended to assist the  Corporation  and its  Subsidiaries  in
attracting  and retaining  Employees and  Independent  Directors of  outstanding
ability and to promote the  identification  of their interests with those of the
stockholders of the Corporation.

3  Administration
   --------------

     The Committee shall  administer the Plan and shall have plenary  authority,
in its  discretion,  to award Options,  Rights,  Restricted  Stock and Incentive
Shares to Employees and Independent Directors,  subject to the provisions of the
Plan. The Committee shall have plenary authority and discretion,  subject to the
provisions  of the Plan,  to determine the terms of all Awards (which terms need
not be  identical)  to  Employees,  including,  but not limited to, the exercise
price of  Options,  the time or times at which  Awards  are made,  the number of
Shares covered by Awards,  whether an Option shall be an Incentive  Stock Option
or a Nonstatutory  Stock Option,  and the period during which Options and Rights
may be  exercised  and  Restricted  Stock shall be subject to  restrictions.  In
making these  determinations,  the Committee may take into account the nature of
the  services  rendered by the Award  recipients,  their  present and  potential
contributions to the success of the Corporation and its  Subsidiaries,  and such
other factors as the Committee in its discretion shall deem relevant. Subject to
the  provisions  of the Plan,  the  Committee  shall have  plenary  authority to
interpret  the Plan,  to  prescribe,  amend and  rescind  rules and  regulations
relating  to it and  to  make  all  other  determinations  deemed  necessary  or
advisable  for  the  administration  of  the  Plan.  The  determinations  of the
Committee  on the matters  referred  to in this  Article 73 shall be binding and
final.

4  Eligibility
   -----------

     Options,  Rights,  Restricted  Stock and Incentive Shares may be granted or
awarded only to Employees,  provided,  however,  that Independent  Directors may
receive  Nonstatutory  Stock  Options  in  accordance  with  the  provisions  of
Article 7.

5  Stock Subject to the Plan
   -------------------------

     5.1.  The  maximum  number of Shares  that may be issued  under the Plan is
625,000  Shares.  The maximum number of Shares with respect to which an Employee
may receive Awards under the Plan is 100,000.

     5.2. If an Option or Right expires or terminates for any reason (other than
termination by virtue of the exercise of a Related  Option or Related Right,  as
the case may be) without  having been fully  exercised,  if Shares of Restricted
Stock are forfeited or if Incentive Shares are not issued or are forfeited,  the
unissued or  forfeited  Shares  which had been subject to the Award shall become
available for the grant of additional Awards.

     5.3. Upon exercise of a Right  (regardless  of whether the Right is settled
in cash or  Shares),  the  number of Shares  with  respect to which the Right is
exercised  shall be charged against the number of Shares issuable under the Plan
and shall not become available for the grant of other Awards.


6  Options
   --------

     6.1.  Options granted under the Plan to Employees shall be either Incentive
Stock Options or  Nonstatutory  Stock  Options,  as designated by the Committee.
Each  Option  granted  under the Plan  shall be clearly  identified  either as a
Nonstatutory Stock Option or an Incentive Stock Option and shall be evidenced by
an Agreement  that  specifies  the terms and  conditions  of the grant.  Options
granted to Employees  shall be subject to the terms and  conditions set forth in
this Article 6 and such other terms and conditions  not  inconsistent  with this
Plan as the Committee may specify. All Incentive Stock Options granted under the
Plan shall comply with the  provisions  of the Code  governing  incentive  stock
options and with all other applicable rules and regulations.

     6.2. The Option Period for Options granted to Employees shall be determined
by the Committee and specifically set forth in the Agreement, provided, however,
that an Option shall not be exercisable  after ten years (five years in the case
of an Incentive Stock Option granted to a Ten-Percent Stockholder) from its Date
of Grant.
 
     6.3. The Committee, in its discretion,  may provide in an Agreement for the
right of the Optionee to surrender  to the  Corporation  an Option (or a portion
thereof) that has become exercisable and to receive upon such surrender, without
any payment to the  Corporation  (other than required tax  withholding  amounts)
that number of Shares  (equal to the highest  whole number of Shares)  having an
aggregate fair market value as of the date of surrender  equal to that number of
Shares subject to the Option (or portion thereof) being  surrendered  multiplied
by an amount  equal to the  excess of (i) the Fair  Market  Value on the date of
surrender  over (ii) the Option Price,  plus an amount of cash equal to the fair
market value of any fractional Share to which the Optionee would be entitled but
for the  parenthetical  above  relating  to whole  number  of  Shares.  Any such
surrender shall be treated as the exercise of the Option (or portion thereof).

7 Independant Director Program
  ----------------------------

     7.1. The Independent  Director  Program shall be a formula plan under which
Independent  Directors shall be granted  Nonstatutory Stock Options, but only in
accordance with the provisions set forth in this Article 7.

     7.2.  Nonstatutory Stock Options shall be granted to Independent  Directors
as follows:

     (i) Each person who becomes an Independent Director shall be granted on the
date such person first becomes an Independent Director,  which shall be the Date
of Grant,  a  Nonstatutory  Stock  Option to purchase  1,500 Shares at an Option
Price equal to the Fair Market Value on the Date of Grant; and

     No,(ii) On December 31st of each year, each  Independent  Director shall be
granted a Nonstatutory  Stock Option to purchase 1,500 Shares at an Option Price
equal to the Fair  Market  Value on such  date,  which date shall be the Date of
Grant;  provided that if any  Independent  Director has served as a Director for
less than a full year as of such Date of Grant,  the  Nonstatutory  Stock Option
granted to such Director on such Date of Grant shall be for the number of Shares
(rounded to the nearest  whole Share) equal to 1,500  multiplied  by a fraction,
the  numerator  of which shall be the number of days such person has served as a
Director and the denominator of which shall be 365.

     7.3.  Nonstatutory Stock Options granted under this Article 7 shall vest in
three  installments on the first,  second and third annual  anniversaries of the
Date of Grant with 40%  thereof  vesting on the first such  anniversary  and 30%
thereof vesting on each of the second and third such  anniversaries,  and may be
exercised by the Optionee at any time after vesting and prior to the termination
of the Nonstatutory Stock Option. Nonstatutory Stock Options granted pursuant to
this Article 7shall  terminate upon the earlier to occur of (i) 7 years from the
Date of Grant or (ii) 90 days from the date on which such Optionee  ceases to be
a member of the Board or, if such Optionee  ceases to be a member of theBoard by
reason of retirement,  disability,  death or removal from such position  without
cause,  five years from the date on which such Optionee ceases to be a member of
the Board.  Nonstatutory  Stock  Options  granted  under this  Article 7 are not
transferable   except  to  the  extent  provided  in  Article 12.   Exercise  of
Nonstatutory  Stock  Options  granted  under this  Article 7 may be made only in
writing  delivered  to the  Corporation  accompanied  by  payment  of the Option
Pricein cash or Shares in accordance with Section 9.1.

     7.4. If on any Date of Grant of  Nonstatutory  Stock Options to Independent
Directors there is an insufficient number of Shares available for such grants to
Independent  Directors,  the number of Shares  subject  to each  grant  shall be
reduced  to the  greatest  whole  number of Shares  arrived at by  dividing  the
remaining  Shares  available  for  such  grants  by the  number  of  Independent
Directors eligible for such grants.

     7.5.  Notwithstanding  the  provisions of  Section 7.3,  an Option  granted
pursuant to this  Article 7  may be  exercised in full upon a Change of Control.
For purposes of this Section 7.5,  a "Change of Control" shall be deemed to have
occurred if after the Date of Grant for such Option  (i) any  person or group of
persons (as defined in  Section 13(d)  and 14(d) of the Exchange  Act)  together
with its  affiliates,  excluding  employee  benefit  plans  of the  Corporation,
becomes,  directly or  indirectly,  the  "beneficial  owner" (as defined in Rule
13d-3 under the Exchange Act) of securities of the Corporation  representing 20%
or more of the  combined  voting  power of the  Corporation's  then  outstanding
securities;  or  (ii) as a result of a tender  offer or  exchange  offer for the
purchase  of  securities  of the  Corporation  (other  than such an offer by the
Corporation for its own securities),  or as a result of a proxy contest, merger,
consolidation  or sale of  assets,  or as a  result  of any  combination  of the
foregoing,  individuals who at the beginning of any two-year  period  constitute
the Board,  plus new directors of the  Corporation  whose election or nomination
for election by the Corporation's stockholders is approved by a vote of at least
two-thirds of the Directors  still in office who were Directors at the beginning
of such two-year  period,  cease for any reason  during such two-year  period to
constitute  at least  two-thirds  of the  members  of the  Board;  or  (iii) the
stockholders  of the  Corporation  approve  a  merger  or  consolidation  of the
Corporation with any other  corporation or entity  regardless of which entity is
the  survivor,  other than a merger or  consolidation  which would result in the
voting  securities  of the  Corporation  outstanding  immediately  prior thereto
continuing to represent (either by remaining outstanding or being converted into
voting  securities  of the  surviving  entity) at least  66 2/3% of the combined
voting  power of the voting  securities  of the  Corporation  or such  surviving
entity outstanding  immediately after such merger or consolidation;  or (iv) the
stockholders  of the  Corporation  approve  a plan of  complete  liquidation  or
winding-up of the Corporation or an agreement for the sale or disposition by the
Corporation of all or substantially all of the Corporation's assets.

8  Rights
   ------
     8.1.  Rights  granted  under the Plan shall be  evidenced  by an  Agreement
specifying the terms and conditions of the grant.
A Right may be granted under the Plan:

     (i)  in  connection  with,  and at the same time as, the grant of an Option
under the Plan;

     (ii) by amendment of an outstanding Option granted under the Plan; or

     (iii)independently of any Option granted under the Plan.

     A Right  granted  under clause (i) or (ii) of the  preceding  sentence is a
Related Right. A Related Right may, in the Committee's discretion,  apply to all
or a portion of the Shares subject to the Related Option.

     8.2.  A Right  may be  exercised  in  whole or in part as  provided  in the
applicable Agreement,  and, subject to the terms of the Agreement,  entitles its
Optionee to receive, without payment to the Corporation (but subject to required
tax  withholding),  either cash or that  number of Shares  (equal to the highest
whole number of Shares), or a combination thereof, in an amount or having a fair
market value  determined  as of the Date of Exercise not to exceed the number of
Shares  subject to the portion of the Right  exercised  multiplied  by an amount
equal to the excess of (i) the Fair Market  Value on the Date of Exercise of the
Right  over (ii)  either (A) the Fair  Market  Value on the Date of Grant of the
Right if it is not a Related  Right,  or (B) the Option Price as provided in the
Related Option if the Right is a Related Right.

     8.3. The Right Period shall be determined by the Committee and specifically
set forth in the Agreement, subject to the following conditions:

     (i)  a  Right will  expire no later than the  earlier of (A) ten years from
the Date of Grant, or (B) in the case of a Related Right,  the expiration of the
related Option:

     (ii) a Right may be  exercised  only when the Fair Market Value on the Date
of Exercise exceeds either (A) the Fair Market Value on the Date of Grant of the
Right if it is not a Related Right or (B) the Option Price of the Related Option
if the Right is a Related Right; and

     (iii)a Right that is a Related Right to an Incentive  Stock Option may be
exercised only when and to the extent the Related Option is exercisable.

     8.4. The  exercise,  in whole or in part,  of a Related Right shall cause a
reduction  in the number of Shares  subject to the Related  Option  equal to the
number  of  Shares  with  respect  to which  the  Related  Right  is  exercised.
Similarly,  the exercise, in whole or in part, of a Related Option shall cause a
reduction  in the number of Shares  subject to the  Related  Right  equal to the
number of Shares with respect to which the Related Option is exercised.

     8.5. The extent  provided in the Agreement,  the Committee  shall have sole
discretion to consent to or  disapprove  the election of any Optionee to receive
cash in full or partial  settlement  of a Right.  In cases  where an election of
settlement  in cash must be consented to by the  Committee,  the  Committee  may
consent to, or  disapprove,  such election at any time after such  election,  or
within  such  period for taking  action as is  specified  in the  election,  and
failure to give consent shall be  disapproval.  Consent may be given in whole or
as to a portion of the Right  surrendered  by the  Optionee.  If the election to
receive cash is  disapproved  in whole or in part,  the Right shall be deemed to
have been  exercised  for Shares,  or, if so specified in the notice of exercise
and election,  not to have been  exercised to the extent the election to receive
cash is disapproved. 9 Exercise of Options and Rights

     9.1.  An  Option  or Right  may,  subject  to the  terms of the  applicable
Agreement  under which it was  granted,  be exercised in whole or in part by the
delivery to the  Corporation of written notice of the exercise,  in such form as
the  Committee may  prescribe,  accompanied,  in the case of an Option,  by full
payment for the Shares  with  respect to which the Option is  exercised.  To the
extent  provided in the  applicable  Option  Agreement,  payment may be made, in
whole or in part, in Shares (other than Restricted  Stock) valued at Fair Market
Value on the Date of Exercise or by delivery of a promissory note as provided in
Section 9.2 hereof.

     9.2.  To the  extent  provided  in an Option  Agreement  and  permitted  by
applicable  law, the Committee may accept as partial payment of the Option Price
a promissory  note executed by the Optionee  evidencing his or her obligation to
make future cash payment thereof;  provided,  however,  that in no event may the
Committee  accept a  promissory  note for an amount in excess of the  difference
between the aggregate  Option Price and the par value of the Shares.  Promissory
notes made pursuant to this Section 9.2  shall be payable upon such terms as may
be  determined  by the  Committee,  shall be  secured  by a pledge of the Shares
received  upon exercise of the Option and shall bear interest at a rate fixed by
the Committee.

10  Restricted Stock Awards
    -----------------------

     10.1.  Restricted  Stock awards under the Plan shall consist of Shares that
are restricted  against  transfer,  subject to  forfeiture,  and subject to such
other terms and  conditions  intended to further the purposes of the Plan as may
be determined by the Committee.  Such terms and  conditions may provide,  in the
discretion  of the  Committee,  for the vesting of such awards to be  contingent
upon the achievement of one or more specified Performance Goals.

     10.2.  Restricted  Stock  awards  under  the  Plan  shall be  evidenced  by
Agreements  specifying  the terms and  conditions of the Award.  Each  Agreement
evidencing an award of Restricted Stock shall contain the following:

     (i)  prohibitions against the sale, assignment, transfer, exchange, pledge,
hypothecation,  or other  encumbrance  of (A) the Shares  awarded as  Restricted
Stock  under the Plan,  (B) the right to vote the  Shares,  and (C) the right to
receive dividends thereon, in each case during the restriction period applicable
to the Shares;  provided,  however,  that the  Grantee  shall have all the other
rights of a  stockholder  including,  but not  limited  to, the right to receive
dividends and the right to vote the Shares;

     (ii)  a requirement that each certificate representing Shares of Restricted
Stock shall be deposited with the Corporation,  or its designee,  and shall bear
the following legend:

          "This  certificate  and the  shares of stock  represented  hereby  are
          subject to the terms and conditions (including the risks of forfeiture
          and restrictions against transfer) contained in the GSE Systems,  Inc.
          1995 Long-Term  Incentive Plan, and an Agreement  entered into between
          the registered owner and GSE Systems, Inc. Release from such terms and
          conditions shall be made only in accordance with the provisions of the
          Plan  and the  Agreement,  a copy of each of  which  is on file in the
          office of the Secretary of GSE Systems, Inc."
 
     (iii)  the terms and conditions upon which any  restrictions  applicable to
Shares  of  Restricted  Stock  shall  lapse  and  new  certificates  free of the
foregoing   legend  shall  be  issued  to  the  Grantee  or  his  or  her  legal
representative; and

     (iv)  such other terms, conditions and restrictions as the Committee in its
discretion may specify including,  without limitation,  terms that condition the
lapse  of  forfeiture  and  transfer   restrictions   upon  the  achievement  of
Performance Goals.

     10.3.  The  Committee  may  include  in  a  Restricted  Stock  Agreement  a
requirement  that in the event of a Grantee's  termination of employment for any
reason prior to the lapse of restrictions,  all Shares of Restricted Stock shall
be  forfeited  by  the  Grantee  to  the  Corporation  without  payment  of  any
consideration  by the  Corporation,  and neither the Grantee nor any successors,
heirs, assigns or personal  representatives of the Grantee shall thereafter have
any further rights or interest in the Shares or certificates.

11  Incentive Shares Awarded
    ------------------------

     11.1.  Incentive  Shares  awarded  under the Plan shall be  evidenced by an
Agreement  specifying  the terms and conditions of such Award.  Incentive  Share
awards  shall  provide for the issuance of Shares to a Grantee at such times and
subject to such terms and  conditions  as the Committee  shall deem  appropriate
including,  but not limited to, terms that condition the issuance of Shares upon
the achievement of Performance Goals.

12  Nontransferability
    ------------------

     Awards  made under this Plan  shall not be  transferable  other than (i) by
will or the laws of descent and  distribution,  or (ii)  pursuant to a qualified
domestic  relations order as defined in section 414(p) of the Code. An Option or
Right may be exercised  during the Optionee's  lifetime only by the Optionee or,
in the event of his or her legal disability, by his or her legal representative.
A Related Right is transferable only when the Related Option is transferable and
only with the  Related  Option and under the same  conditions  that apply to the
Related Option.

13  Capital Adjustments
    -------------------

     In the event of any change in the outstanding Common Stock by reason of any
stock dividend,  split-up,  recapitalization,  reclassification,  combination or
exchange of shares,  merger,  consolidation  or  liquidation  and the like,  the
Committee may, in its discretion,  provide for a substitution  for or adjustment
in (i) the number and class of Shares subject to  outstanding  Options,  Rights,
Restricted  Stock and Incentive  Share awards,  (ii) the Option Price of Options
and the base price upon which  payments under Rights that are not Related Rights
are  determined,  and (iii) the  aggregate  number and class of Shares for which
Awards thereafter may be made under the Plan and to individual Award recipients.
The adjustments made with respect to Nonstatutory Stock Options granted pursuant
to Article 7 shall be equivalent to the treatment  accorded to holders of Common
Stock.

14  Termination or Amendment
    ------------------------

     The Board may  amend,  alter or  terminate  the Plan in any  respect at any
time;  provided,  however,  that,  after  the  Plan  has  been  approved  by the
stockholders of the Corporation, no amendment,  alteration or termination of the
Plan  shall  be made by the  Board  without  approval  of (i) the  Corporation's
stockholders to the extent stockholder  approval of the amendment is required by
applicable law or regulations or the  requirements of the principal  exchange or
interdealer  quotation system on which the Common Stock is listed or quoted, and
(ii)  each  affected  Optionee  or  Grantee  if such  amendment,  alteration  or
termination  would adversely  affect his or her rights or obligations  under any
Award made prior to the date of such amendment, alteration or termination.

15   Modification,  Extension and Renewal of Options, Rights, Restricted Stock 
     and Intentive Shares; Substituted Options and Rights 
     ----------------------------------------------------
 
     15.1.  Subject to the terms and  conditions of the Plan,  the Committee may
modify,  extend or renew outstanding Options and Rights, or accept the surrender
of  outstanding  options  and  stock  appreciation  rights  (to the  extent  not
theretofore  exercised)  granted  under the Plan or under any other  plan of the
Corporation  or a  Subsidiary,  and  authorize  the  granting of new Options and
Rights  pursuant  to the  Plan  in  substitution  therefor  (to the  extent  not
theretofore  exercised),  and the  substituted  Options or Rights may  specify a
lower exercise price than the surrendered options and stock appreciation rights,
a longer term than the surrendered  options and stock  appreciation  rights,  or
have any other provisions that are authorized by the Plan.  Subject to the terms
and  conditions  of  the  Plan,  the  Committee  may  modify  the  terms  of any
outstanding awards of Restricted Stock or Incentive Shares.  Notwithstanding the
foregoing,  however,  no modification of an Award shall,  without the consent of
the  Optionee or Grantee,  alter or impair any of the  Optionee's  or  Grantee's
rights or obligations under such Award.

     15.2.  Anything contained herein to the contrary  notwithstanding,  Options
and Rights may, at the discretion of the Committee, be granted under the Plan in
substitution  for stock  appreciation  rights and options to purchase  shares of
capital stock of another corporation which is merged into, consolidated with, or
all or a  substantial  portion of the property or stock of which is acquired by,
the  Corporation  or one of its  Subsidiaries.  The terms and  conditions of the
substitute  Options and Rights so granted may vary from the terms and conditions
set forth in this Plan to such extent as the Committee may deem appropriate (but
only to the extent  consistent with the  requirements of Rule 16b-3) in order to
conform,  in  whole  or  part,  to the  provisions  of  the  options  and  stock
appreciation rights in substitution for which they are granted. Such Options and
Rights shall not be counted toward the 100,000 Share limit imposed by the second
sentence of Section 5.1,  except to the extent it is determined by the Committee
that the  applicability  of such  sentence  is  required  in order for grants of
Options and Rights  hereunder  to be  eligible to qualify as  "performance-based
compensation" within the meaning of Section 162(m) of the Code.

16  Effectiveness of the Plan
    -------------------------

     The Plan and any  amendments  requiring  stockholder  approval  pursuant to
Article  14  are  subject  to  approval  by  vote  of  the  stockholders  of the
Corporation within 12 months after their adoption by the Board.  Subject to that
approval,  the Plan and any  amendments  are effective on the date on which they
are adopted by the Board. Options, Rights, Restricted Stock and Incentive Shares
may be  granted  or  awarded  prior  to  stockholder  approval  of the  Plan  or
amendments,  but each such Award shall be subject to the approval of the Plan or
amendments by the stockholders.  The date on which any Option, Right, Restricted
Stock or Incentive  Shares granted or awarded prior to  stockholder  approval of
the Plan or amendment  is granted or awarded  shall be the Date of Grant for all
purposes as if the Option,  Right,  Restricted Stock or Incentive Shares had not
been subject to  approval.  No Option,  or Right may be exercised  prior to such
stockholder approval, and any Restricted Stock or Incentive Shares awarded shall
be forfeited if such stockholder approval is not obtained.

17  Withholding
    -----------

     The  Corporation's  obligation to deliver Shares or pay any amount pursuant
to the terms of any Award  hereunder  shall be  subject to the  satisfaction  of
applicable federal, state and local tax withholding requirements.  To the extent
provided in the applicable  Agreement and in accordance with rules prescribed by
the  Committee,  an Optionee or Grantee  may  satisfy any such  withholding  tax
obligation  by any of the  following  means or by a  combination  of such means:
(i) tendering  a cash  payment,  (ii) authorizing  the  Corporation  to withhold
Shares otherwise issuable to the Optionee or Grantee, or (iii) delivering to the
Corporation already owned and unencumbered Shares.

18  Term of the Plan
    ----------------

     Unless  sooner  terminated  by the Board  pursuant  to Article 14, the Plan
shall terminate on June 30, 2005, and no Options,  Rights,  Restricted  Stock or
Incentive  Shares may be granted or awarded after such date. The  termination of
the Plan shall not affect the validity of any Award  outstanding  on the date of
termination.

19  Indemnification of Committee
    ----------------------------

     In addition  to such other  rights of  indemnification  as they may have as
Directors or as members of the Committee,  the members of the Committee shall be
indemnified  by the  Corporation  against  the  reasonable  expenses,  including
attorneys' fees, actually and reasonably incurred in connection with the defense
of any action, suit or proceeding,  or in connection with any appeal therein, to
which  they or any of them  may be a party  by  reason  of any  action  taken or
failure  to act  under or in  connection  with the  Plan or any  Option,  Right,
Restricted Stock or Incentive Shares granted or awarded  hereunder,  and against
all amounts  reasonably  paid by them in  settlement  thereof or paid by them in
satisfaction  of a judgment  in any such  action,  suit or  proceeding,  if such
members  acted in good faith and in a manner  which they  believed to be in, and
not opposed to, the best interests of the Corporation.

20  General Provisions
    ------------------

     20.1. The  establishment  of the Plan shall not confer upon any Employee or
Independent  Director any legal or equitable right against the Corporation,  any
Subsidiary or the Committee, except as expressly provided in the Plan.

     20.2.  The Plan does not  constitute  inducement or  consideration  for the
employment of any Employee or the service of any Independent Director, nor is it
a contract  between  the  Corporation  or any  Subsidiary  and any  Employee  or
Independent  Director.  Participation  in the Plan shall not give an Employee or
Independent  Director any right to be retained in the service of the Corporation
or any Subsidiary.

     20.3.  Neither  the  adoption  of  this  Plan  nor  its  submission  to the
stockholders,  shall be taken to impose  any  limitations  on the  powers of the
Corporation or its  Subsidiaries to issue,  grant, or assume options,  warrants,
rights, or restricted  stock,  otherwise than under this Plan, or to adopt other
stock  option  or  restricted  stock  plans  or to  impose  any  requirement  of
stockholder approval upon the same.

     20.4. The interests of any Employee or Independent  Director under the Plan
are not subject to the claims of creditors and may not, in any way, be assigned,
alienated or encumbered except as provided in Article 12.

     20.5. The Plan shall be governed,  construed and administered in accordance
with the laws of the State of Delaware and the intention of the Corporation that
Incentive Stock Options granted under the Plan qualify as such under section 422
of the Code.

     20.6. The Committee may require each person  acquiring  Shares  pursuant to
Awards  hereunder to represent to and agree with the Corporation in writing that
such person is acquiring the Shares without a view to distribution  thereof. The
certificates  for such Shares may include any legend which the  Committee  deems
appropriate to reflect any restrictions on transfer. All certificates for Shares
issued  pursuant to the Plan shall be subject to such stock transfer  orders and
other  restrictions  as the  Committee  may  deem  advisable  under  the  rules,
regulations and other  requirements  of the Securities and Exchange  Commission,
any  stock  exchange  upon  which  the  Common  Stock  is then  listed,  and any
applicable federal or state securities laws. The Committee may place a legend or
legends  on  any  such  certificates  to  make  appropriate  reference  to  such
restrictions.

     20.7.  The  Corporation  shall not be required to issue any  certificate or
certificates  for Shares with respect to Awards  under this Plan,  or record any
person as a holder of record of such Shares, without obtaining,  to the complete
satisfaction  of the  Committee,  the approval of all  regulatory  bodies deemed
necessary by the Committee,  and without  complying to the Committee's  complete
satisfaction,  with all rules and regulations, under federal, state or local law
deemed applicable by the Committee.




                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

     
                                                                   Exhibit 10.18

                                GSE Systems, Inc.
             (Exact name of registrant as specified in its charter)


                             MODIFICATION AGREEMENT
  

     THIS MODIFICATION AGREEMENT (this "Agreement") is made as of the ___ day of
January, 1999 by and among GSE POWER SYSTEMS, INC. (f/k/a Simulation,  Systems &
Services  Technologies  Company),  a Delaware  corporation ("GSE Power"),  MSHI,
INC., a Virginia corporation ("MSHI"),  GSE PROCESS SOLUTIONS,  INC., a Delaware
corporation ("GSE Process"),  GSE SYSTEMS, INC., a Delaware corporation ("GSE"),
GP INTERNATIONAL ENGINEERING & SIMULATION, INC., a Delaware corporation ("GPI"),
GP STRATEGIES  CORPORATION,  a Delaware  corporation ("GP Strategies"),  MANTECH
INTERNATIONAL  CORPORATION,  a New Jersey corporation  ("ManTech"),  GSE PROCESS
SOLUTIONS  B.V.  (f/k/a  Beleggingsmaatschappij  Rivier B.V.) ("GSE B.V."),  GSE
PROCESS  SOLUTIONS  SINGAPORE  (PTE) LIMITED ("GSE  Singapore")  and GSE PROCESS
SOLUTIONS  BELGIUM NV ("GSE  Belgium") and FIRST UNION NATIONAL BANK, a national
banking  association,   successor  by  merger  to  CoreStates  Bank,  N.A.  (the
"Lender").  GSE  Power,  MSHI  and  GSE  Process  are  collectively  called  the
"Borrowers." GSE, GPI, GSE B.V., GSE Singapore,  GSE Belgium,  GP Strategies and
ManTech  are  collectively  called  the  "Guarantors."  The  Borrowers  and  the
Guarantors are collectively called the "Obligors."

Recitals

     A. $7,000,000 GSE Power Line of Credit

     A-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000 (the "GSE Power Line of Credit") to GSE Power and MSHI pursuant to
a Letter of Credit,  Loan and Security  Agreement  dated  January 30,  1996,  as
amended  from time to time (the "GSE Power Line of Credit  Agreement").  The GSE
Power Line of Credit is evidenced by a Promissory Note dated January 30, 1996 in
the original  principal amount of $7,000,000,  as amended from time to time (the
"GSE Power Line of Credit Note").

     A-2.  The GSE Power Line of Credit is secured by, among other  things,  (a)
the GSE Power Line of Credit  Agreement,  whereby GSE Power and MSHI  granted to
the Lender a security  interest in (i) all of GSE Power's and MSHI 's  Accounts,
Inventory, Chattel Paper, Documents, Instruments, General Intangibles (including
without  limitation all tax refunds) and Equipment (whether or not fixtures) (as
defined  in the  GSE  Power  Line of  Credit  Agreement),  as more  particularly
described  therein  and (ii) a Lockbox  (the "GSE  Power  Lockbox"),  Restricted
Account #14106-95540, the Borrowers' Account #14106-95532 (as defined in the GSE
Power Line of Credit  Agreement) and any other account  established by GSE Power
or MSHI with the Lender and all cash and any other assets contained therein; (b)
a Security Agreement dated January 30, 1996 between GPI and the Lender (the "GPI
Security  Agreement"),  whereby GPI granted to the Lender a security interest in
all of GPI's inventory (including raw materials and work-in-process), equipment,
accounts, general intangibles, chattel paper, instruments and documents, as more
particularly   described  therein;  (c)  a  Collateral  Assignment  of  Patents,
Trademarks,  Copyrights,  Licenses  and Trade  Secrets  dated  January  30, 1996
between  GSE Power and the  Lender  (the "GSE  Power  Assignment  of  Patents"),
whereby  GSE Power  granted  to the  Lender a  security  interest  in all of GSE
Power's patents,  patent applications,  inventions,  trademarks,  service marks,
trademark  applications,  service mark  applications,  trademark  registrations,
service  mark  registrations,   tradenames,  trade  dress,  goodwill,  licenses,
copyrights,  copyright applications,  copyright registrations and trade secrets,
as more  particularly  described  therein;  and (d) a Collateral  Assignment  of
Patents,  Trademarks,  Copyrights,  Licenses and Trade Secrets dated January 30,
1996 between GPI and the Lender (the "GPI  Assignment of Patents"),  whereby GPI
granted  to the  Lender a  security  interest  in all of GPI's  patents,  patent
applications,  inventions,  trademarks,  service marks, trademark  applications,
service mark applications,  trademark registrations, service mark registrations,
tradenames, trade dress, goodwill, licenses, copyrights, copyright applications,
copyright  registrations  and  trade  secrets,  as more  particularly  described
therein.

     A-3. The GSE Power Line of Credit is  guaranteed by GSE and GPI pursuant to
separate  Guaranty  Agreements  dated January 30, 1996 (the "GSE Power Corporate
Guaranties").

     A-4. The GSE Power Line of Credit is also  guaranteed by the  Export-Import
Bank ("Exim")  pursuant to a Master Guarantee  Agreement (No.  PA-MGA-005) dated
December 12, 1995 and a Master  Guarantee  Agreement (No.  PA-MGA-96-005)  dated
February 13, 1997, as amended from time to time,  including without limitation a
letter  dated  December  17,  1998  evidencing  an  extension  by  Exim  of  the
Availability  Date (as defined in such Master Guarantee  Agreement) to March 31,
1999 (collectively,  the "Exim Guaranty"). In connection with the Exim Guaranty,
GSE Power and MSHI entered into Borrower  Agreements dated December 12, 1995 and
February 13, 1997 with the Lender,  as amended from time to time  (collectively,
the "Exim Borrower Agreement").

     A-5.  Pursuant to the GSE Power Line of Credit  Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit. In connection therewith, GSE Power and MSHI entered into separate Master
Letter of Credit  Agreements dated January 30, 1996, in favor of the Lender (the
"GSE Power
Letter of Credit Agreements").

     A-6. The GSE Power Line of Credit  Agreement,  the GSE Power Line of Credit
Note, the GPI Security Agreement,  the GSE Power Assignment of Patents,  the GPI
Assignment of Patents,  the GSE Power Corporate  Guaranties,  the Exim Guaranty,
the Exim Borrower  Agreement,  the GSE Power Letter of Credit Agreements and all
other documents evidencing,  securing,  guaranteeing or otherwise related to the
GSE Power Line of Credit are collectively called the "GSE Power Loan Documents".

     A-7. As of December 18, 1998, exclusive of any amounts which may become due
in connection with the GSE Power Letter of Credit Agreements, there is due under
the GSE Power Line of Credit  principal of Five Million Eight  Hundred  Thousand
Nine Hundred and 00/100  Dollars  ($5,800,900.00)  and interest of  Twenty-Three
Thousand Six Hundred Fifty-Five and 00/100 Dollars ($23,655.00), plus attorneys'
fees and other costs which are payable under the GSE Power Loan Documents.

     A-8. Pursuant to Article III of the GSE Power Line of Credit Agreement, and
included  within the maximum  amount  available  to be borrowed by GSE Power and
MSHI under the GSE Power Line of Credit,  there is outstanding  Letter of Credit
No. SM406588 in the face amount of $180,243 issued by the Lender for the benefit
of Central  Trust of China  Procurement  Department  (the "GSE  Power  Letter of
Credit").

     B. $3,000,000 GSE Process Line of Credit
         
     B-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000  (subsequently  reduced to  $3,000,000)  (the "GSE Process Line of
Credit")  to GSE  Process  pursuant  to a Letter of  Credit,  Loan and  Security
Agreement  dated  January 31,  1995,  as amended and  restated by an Amended and
Restated Letter of Credit,  Loan and Security  Agreement dated October 13, 1995,
as amended by an Amendment  Number One to Amended and Restated Letter of Credit,
Loan and  Security  Agreement  and  Promissory  Note  dated  February  23,  1996
("Amendment  Number One") and by an Amendment Number Two to Amended and Restated
Letter of Credit, Loan and Security Agreement and Promissory Note dated November
11, 1997 ("Amendment Number Two") (collectively, the "GSE Process Line of Credit
Agreement").  The GSE Process Line of Credit is  evidenced by a Promissory  Note
dated October 13, 1995 in the original  principal  amount of  $7,000,000  (which
replaces a  Promissory  Note dated  January 31, 1995 in the  original  principal
amount of  $6,000,000),  as amended  by  Amendment  Number One and by  Amendment
Number Two (collectively, the "GSE Process Line of Credit Note")

     B-2. The GSE Process Line of Credit is secured by, among other things,  (a)
the GSE Process  Line of Credit  Agreement,  whereby GSE Process  granted to the
Lender a security  interest  in (i) all of GSE  Process's  Accounts,  Inventory,
Chattel Paper,  Documents,  Instruments,  General Intangibles (including without
limitation all tax refunds) and Equipment  (whether or not fixtures) (as defined
in the GSE Process Line of Credit  Agreement),  as more  particularly  described
therein  and (ii) a  Lockbox(the  "GSE  Process  Lockbox"),  Restricted  Account
#2013-3257,  the  Borrower's  Account  #2013-3249 (as defined in the GSE Process
Line of Credit Agreement) and any other account  established by GSE Process with
the Lender and all cash and any other assets contained therein; and (b) a Demand
Note dated  January 31, 1995 from GSE to GSE Process in the  original  principal
amount of  $750,000,  which has been  endorsed  to the order of the Lender  (the
"Assigned Note").

     B-3.  The GSE  Process  Line of  Credit  is  guaranteed  by GSE  B.V.,  GSE
Singapore and GSE Belgium pursuant to separate Guaranties dated October 13, 1995
and by GP Strategies and ManTech pursuant to separate  Guarantees dated March 6,
1998 (the "GSE Process Guaranties").

     B-4. Pursuant to the GSE Process Line of Credit Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit.  In connection  therewith,  GSE Process  entered into a Master Letter of
Credit  Agreement  dated  January  31,  1995,  in favor of the Lender  (the "GSE
Process Letter of Credit Agreement").

     B-5.  The GSE Process  Line of Credit  Agreement,  the GSE Process  Line of
Credit Note,  the Assigned  Note,  the GSE Process  Guaranties,  the GSE Process
Letter  of  Credit  Agreement  and all  other  documents  evidencing,  securing,
guaranteeing  or  otherwise  related  to the  GSE  Process  Line of  Credit  are
collectively called the "GSE Process Loan Documents."

     B-6. As of December 18, 1998, exclusive of any amounts which may become due
in  connection  with the GSE Process  Letter of Credit  Agreement,  there is due
under the GSE Process Line of Credit principal of Zero and 00/100 Dollars ($-0-)
and  interest of One Thousand  One Hundred Ten and 52/100  Dollars  ($1,110.52),
plus  attorneys'  fees and other costs  which are payable  under the GSE Process
Loan Documents.

     B-7.  Pursuant to Article III of the GSE Process Line of Credit  Agreement,
and included  within the maximum amount  available to be borrowed by GSE Process
under the GSE Process Line of Credit,  there is outstanding Letter of Credit No.
405600 in the face  amount of  $630,000  issued by the Lender for the benefit of
8930 Stanford Boulevard, LLC (the "GSE Process Letter of Credit").

     C. The GSE Power  Line of Credit  and the GSE  Process  Line of Credit  are
called the "Lines of Credit." The GSE Power Line of Credit Agreement and the GSE
Process Line of Credit Agreement are called the "Line of Credit Agreements." The
GSE Power Line of Credit Note and the GSE Process Line of Credit Note are called
the "Notes." The GSE Power Loan Documents and the GSE Process Loan Documents are
called the "Loan  Documents."  The GSE Power Lockbox and the GSE Process Lockbox
are collectively  called the "Lockboxes."  Restricted  Account  #14106-95540 and
Restricted Account #2013-3257 are collectively called the "Restricted Accounts."
Borrowers'   Account   #14106-95532  and  Borrower's   Account   #2013-3249  are
collectively  called the  "Borrowers'  Accounts." The GSE Power Letter of Credit
Agreements  and the GSE  Process  Letter of Credit  Agreement  are  collectively
called the "Letter of Credit Agreements." The GSE Power Letter of Credit and the
GSE  Process  Letter of Credit  (and any  replacement  for such Letter of Credit
issued  pursuant to paragraph  10 hereof),  together  with any other  Letters of
Credit which may be issued by the Lender  pursuant to the terms of the Letter of
Credit  Agreements,  as amended by this Agreement,  are collectively  called the
"Letters of Credit."

     D. Capitalized terms used herein and no otherwise defined herein shall have
the meanings set forth in the applicable Loan Documents.

     E. The Lines of Credit matured on December 31, 1998.

     F. The Obligors have  requested  that the Lender  continue to make advances
under the Lines of Credit and extend the  maturity  dates of the Lines of Credit
until June 30,  1999 and the Lender is willing to do so subject to the terms and
conditions set forth in this Agreement.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
agreements set forth herein,  the sum of Ten Dollars ($10.00) and other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged by the parties, the parties hereto covenant and agree as follows.

1. Recitals. The Recitals set forth above are a material part of this Agreement.
The  Obligors  acknowledge  and affirm the  accuracy of the  Recitals  set forth
above.

2.  Confirmation and Ratification of Documents;  Consent to this Agreement.  The
Obligors  agree  that the Loan  Documents  are in full force and effect and that
each Loan  Document  shall  remain in full  force and  effect  unless  and until
modified or amended in writing in accordance with its terms. The Obligors ratify
and confirm their  respective  obligations  under the Loan Documents,  and agree
that the execution and delivery of this Agreement  shall not in any way diminish
or invalidate any of their respective obligations under the Loan Documents.  All
parties  consent to the execution and delivery of this  Agreement and to all the
provisions of this  Agreement to the extent that such  provisions may modify the
terms and provisions of any of the Loan Documents.

3. Extension Fee/Administrative Fee.
(a) Upon execution of this  Agreement,  the Borrowers shall pay to the Lender by
certified or cashier's check an extension fee of $10,000.
(b)  Commencing  on the date of execution of this  Agreement  (representing  the
January 1999 monthly payment) and on the first day of each month thereafter, the
Borrowers shall pay monthly to the Lender an administrative fee of approximately
$500, the exact amount to be determined by the Lender.

4. Costs and Expenses. Upon execution of this Agreement, the Borrowers shall pay
to the Lender by  certified or  cashier's  check all actual costs and  expenses,
including, without limitation, attorneys' fees, UCC search costs and recordation
costs incurred by the Lender in connection with the Lines of Credit.

5. Landlord's Waivers.  Contemporaneously  with the execution of this Agreement,
the Borrowers shall deliver to the Lender  agreements  which must be in form and
substance  satisfactory  to the  Lender  in its  sole  discretion,  waiving  any
landlord's or  mortgagee's or  lienholder's  rights to enforce any claim against
the  Borrowers  against any  collateral of the Lender and allowing the Lender to
have  access  to its  collateral  for  purposes  of  inspection  and/or  to take
possession  thereof  in  accordance  with the  Lender's  rights  under  the Loan
Documents and applicable  law. In connection  therewith,  and  contemporaneously
with the execution of this Agreement,  the Borrowers shall provide to the Lender
copies of all leases,  mortgages or similar agreements  relating to any facility
that is not owned by the Borrowers at which any collateral is located.

6.  Permanent  Reductions in GSE Process Line of Credit.  Upon execution of this
Agreement,  the  availability  under the GSE  Process  Line of  Credit  shall be
permanently  reduced to $2,000,000.  Effective January 31, 1999, the GSE Process
Line of Credit shall be permanently reduced to $1,750,000. Effective February 3,
1999, the GSE Process Line of Credit shall be permanently reduced to $1,120,000.
Effective  March 31, 1999,  the GSE Process Line of Credit shall be  permanently
reduced to $1,000,000. In the event that, on the date that each of the foregoing
reductions is effective,  the amount  outstanding  under the GSE Process Line of
Credit shall exceed the amount available under the GSE Process Line of Credit as
reduced,  GSE Process shall pay to the Lender an amount equal to the  difference
between the amount  available as reduced and the amount  outstanding on the date
that each of the foregoing reductions is effective.

7. Qualified Receivables/Eligible Receivables/Borrowing Base Certificates.

     (a)  For  the GSE  Power  Line  of  Credit,  for  purposes  of  determining
Collateral  Value,  Qualified  Receivables  will continue to be valued at ninety
percent (90%) of their outstanding principal amount. The definition of Qualified
Receivables in the GSE Power Line of Credit Agreement is amended to provide that
the payment  obligation  represented by the Qualified  Receivable shall not have
been  outstanding  more  than 90  calendar  days  from the date of the  original
invoice.  Qualified  Receivables shall not include any intercompany  Receivables
(i.e., Receivables owed by an affiliate or subsidiary of either of the Borrowers
or any of the  Guarantors).  Inventory  (i.e.,  Unbilled  Receivables)  shall be
valued at fifty percent (50%) of their outstanding  principal amount.  Qualified
Receivables  and  Inventory  which are not included for purposes of  determining
Collateral  Value shall  nevertheless  remain as collateral for all  obligations
owed to the Lender.

     (b) For the GSE Process Line of Credit,  Collateral  Value will be equal to
80% of the amount of Eligible  Receivables  (as defined in the  applicable  loan
agreement).  The  definition of Eligible  Receivables in the GSE Process Line of
Credit Agreement is amended to provide that the payment  obligation  represented
by the  Qualified  Receivable  shall  not have  been  outstanding  more  than 60
calendar days from the date of the original invoice.  Eligible Receivables shall
not include any intercompany Receivables (i.e., Receivables owed by an affiliate
or  subsidiary  of  either of the  Borrowers  or any of the  Guarantors)  or any
International   Receivable.   Inventory  shall  be  valued  at  zero.   Eligible
Receivables  and  Inventory  which are not included for purposes of  determining
Collateral  Value shall  nevertheless  remain as collateral for all  obligations
owed to the Lender.  GSE Process  shall  maintain  at all times  (regardless  of
whether any amounts are outstanding  under the GSE Process Line of Credit or the
GSE  Process  Line of  Credit  has been  paid in full)  at least  $3,000,000  in
Eligible Receivables.

     (c) Each of the  Borrowers  shall  furnish the Lender with  borrowing  base
certificates  (in form acceptable to the Lender in its sole  discretion) (i) not
later than 1:00 p.m. (Baltimore, Maryland time) on Tuesday of each week (for the
week ending the prior Friday)  (regardless of whether any advance is requested),
(ii) not later than 1:00 p.m.  (Baltimore,  Maryland  time) on the  Business Day
following  any day  (which  must be a  Business  Day) on  which  an  advance  is
requested (which must be current as of the day immediately preceding the day the
borrowing  base  certificate  must be furnished to the Lender) and (iii) at such
other times as the Lender may request.  Such borrowing base certificates  should
be sent to (a) First  Union  National  Bank,  1970 Chain  Bridge  Road,  McLean,
Virginia 22102, Attn: David A. Dix, Vice President and (b) Audit and Collateral,
Philadelphia, Pennsylvania, Attn: Betty Boyle, Telecopy (215) 973-2224.

     8. Interest Rate. The unpaid  principal  balances (both the existing unpaid
principal  balances  and  future  advances)  of the Lines of Credit  shall  bear
interest  at the  Lender's  prime  rate plus one and  one-half  percent  (11/2%)
through  April 29,  1999.  Commencing  on April 30, 1999,  the unpaid  principal
balances (both the existing unpaid  principal  balances and future  advances) of
the Lines of Credit shall bear  interest at the  Lender's  prime rate plus three
percent  (3%).  The  Borrowers  will no  longer  have the  option  to  request a
Eurodollar Loan (as defined in the applicable Line of Credit  Agreements).  Upon
the  occurrence of an Event of Default,  interest shall accrue and be payable at
the applicable interest rate plus one percent (1%).

     9.  Maturity  Date.  The Lines of Credit shall expire on June 30, 1999 (the
"Maturity  Date") and all  principal,  interest and other sums then  outstanding
shall be immediately due and payable.  The Obligors  acknowledge that the Lender
has  previously  extended the maturity  dates of the Lines of Credit and further
acknowledge that the Lender has advised the Obligors that this will be the final
extension.

     10. Letters of Credit.

     (a) No  Letters  of Credit  that  expire  after the date the Exim  Guaranty
expires shall be issued under the GSE Power Line of Credit.  Notwithstanding the
foregoing,  any Letters of Credit issued under the GSE Power Line of Credit must
comply in all respects  with Section  4.10 of the Exim  Guaranty.  No Letters of
Credit shall be issued  under the GSE Process  Line of Credit,  except that upon
the  expiration of existing GSE Process  Letter of Credit No. 405600 in the face
amount of  $630,000  issued  by the  Lender  for the  benefit  of 8930  Stanford
Boulevard,  LLC, and provided  that no Event of Default has occurred  hereunder,
the  Lender  agrees to issue a Letter of Credit in the face  amount of  $555,000
with an expiration date of February 3, 2000 to replace such existing GSE Process
Letter of Credit.

     (b) By June 30, 1999,  the Borrowers must either (i) replace any Letters of
Credit  that  expire  after June 30,  1999 and cause the  beneficiaries  of such
Letters of Credit to return the original Letters of Credit to the Lender or (ii)
purchase  a  certificate  of deposit in an amount  equal to the  aggregate  face
amount of all Letters of Credit that expire after June 30, 1999,  which shall be
pledged to the Lender and (A)  applied by the Lender  against  any  amounts  due
under the  Letters of Credit in the event any Letters of Credit are drawn or (B)
returned to the  Borrowers  at such time as the  original  Letters of Credit are
returned to the Lender without  having been drawn,  provided that all principal,
interest  and other  sums due under the Lines of Credit  have been paid in full;
the Borrowers shall execute such  documentation  in connection  therewith as the
Lender may require in its sole discretion.

     11.  Lockbox.  Each of the  Borrowers  has  established  a Lockbox with the
Lender into which GSE Power and GSE  Process  have  directed,  or will direct by
written  notice in form and  substance  satisfactory  to the  Lender in its sole
discretion,  all  account  debtors  of GSE  Power  and GSE  Process  to send all
payments on accounts.  Amounts  received in each Lockbox shall be deposited upon
collection  into  collateral  accounts  (separately,  the "GSE Power  Collateral
Account"  and  the  "GSE  Process  Collateral  Account"  and  collectively,  the
"Collateral Accounts") over which the Lender shall have sole power of withdrawal
until  such time as the Lines of Credit  shall have been  fully  satisfied.  All
amounts in the GSE Power Collateral Account shall be applied,  on a daily basis,
to reduce the  outstanding  balance  of the GSE Power  Line of  Credit,  in such
manner as the Lender may  determine in its sole  discretion.  All amounts in the
GSE Process Collateral Account shall be applied, on a daily basis, to reduce the
outstanding  balance of the GSE  Process  Line of Credit,  in such manner as the
Lender  may  determine  in its  sole  discretion.  Immediately  upon an Event of
Default,  all amounts in the  Collateral  Accounts  may be applied to reduce the
outstanding balances of either or both of the Lines of Credit, in such manner as
the Lender may determine in its sole  discretion  (i.e.,  all amounts in the GSE
Power Collateral Account may be applied to reduce the outstanding balance of the
GSE Power Line of Credit  and/or the GSE Process  Line of Credit and all amounts
in the GSE Process  Collateral  Account may be applied to reduce the outstanding
balance of the GSE Process  Line of Credit  and/or the GSE Power Line of Credit,
in such manner as the Lender may determine in its sole discretion).

     12. Financial Covenants.  The financial covenants set forth in Article X of
the Line of Credit Agreements are deleted and replaced with the following:

     (a) GSE shall  maintain a ratio of Total  Liabilities to Tangible Net Worth
(i.e., Total Stockholders'  Equity less goodwill and other intangible assets and
software  development costs) of not more than 3.9 to 1.0 at all times commencing
on December 31, 1998 and thereafter.

     (b) GSE shall maintain a Tangible Net Worth of not less than  $5,000,000 at
all times commencing on December 31, 1998 and thereafter.

     (c) GSE shall maintain a ratio of  EBIT/Interest of not less than 4.0 times
at all times commencing on December 31, 1998 and thereafter.

     (d) GSE shall maintain Net Working  Capital of not less than  $1,000,000 at
all times commencing on December 31, 1998 and thereafter.

     (e) GSE shall maintain  EBITDA for each quarter of not less than $1,250,000
(to be tested at December 31, 1998 and quarterly thereafter).

     Unless otherwise  defined,  all accounting terms shall have the definitions
given them in  accordance  with  generally  accepted  accounting  principles  as
applied to GSE and its subsidiaries, on a consistent basis by its accountants in
the  preparation  of  its  previous  annual  financial  statements,  and  unless
otherwise  indicated,  all accounting  terms and covenants shall be applied on a
consolidated basis.

     13. Borrowings.

     (a) Section 11.3 of the Line of Credit  Agreements  is deleted and replaced
with the  following:  Neither of the  Borrowers  shall incur any  liability  for
borrowed money except for the indebtedness to the Lender.

     (b) The definition of Permitted Liens is amended to delete subsection (h).

     (c) Notwithstanding the foregoing,  existing  indebtedness to GSE or any of
the  stockholders  of GSE as set forth in  Schedule 1 attached  hereto  shall be
permitted and the Borrowers shall be permitted to incur  indebtedness  after the
date hereof as set forth on Schedule 2 attached hereto.

     14. Financial Statements and Information.

     (a)  Commencing  on January 15, 1999 and on the fifteenth day of each month
thereafter,  the  Borrowers  shall provide on a monthly basis a list of accounts
receivable,  a listing of open unbilled contracts receivable (for GSE Power) and
accounts  payable agings and listings  current as of the end of the prior month.
The Borrowers  shall send such list to (a) First Union National Bank, 1970 Chain
Bridge Road,  McLean,  Virginia 22102,  Attn: David A. Dix, Vice President,  (b)
Audit and Collateral Management, Philadelphia,  Pennsylvania, Attn: Betty Boyle,
Telecopy (215) 973-2224 and (c) Exim.

     (b) The  Borrowers  shall  provide  the Lender and Exim on a monthly  basis
consolidated and consolidating  financial  statements in such form and detail as
the Lender may require and a certificate of the chief  financial  officer of GSE
stating  whether  any default or Event of Default  has  occurred  under the Loan
Documents,  this  Agreement or any documents  executed in  connection  with this
Agreement  and, if so,  stating the facts with respect  thereto.  The  Borrowers
shall also  provide the Lender and Exim on a monthly  basis with both a Contract
Status  Report and open export  purchase  order  listing  certified by the chief
financial  officer of GSE stating  whether GSE Power and MSHI are in  compliance
with  the  terms  and   conditions   of  the  Exim  Guaranty  and  related  Loan
Authorization  Agreement and Borrower  Agreement and, if not,  stating the facts
relating to such  noncompliance.  Such Contract Status Report shall also include
letter of credit  coverage,  currency and United States made product content and
such other information as the Lender may request.

     (c) Within one hundred  twenty (120) days from the end of each fiscal year,
the  Borrowers  shall  provide  to the  Lender  and Exim the  complete  10-K and
consolidating  balance sheets and income and expense  statements of GSE together
with its subsidiaries audited by an independent certified public accountant firm
selected by GSE and acceptable to the Lender.  Within  forty-five (45) days from
the end of each fiscal  quarter,  the Borrowers  shall provide to the Lender and
Exim the complete 10-Q and  consolidating  balance sheets and income and expense
statements  of GSE together  with its  subsidiaries,  in  reasonable  detail and
prepared in accordance with GAAP and certified by the chief financial officer of
GSE. The foregoing financial statements shall be accompanied by a certificate of
the chief  financial  officer of GSE  stating  whether  any  default or Event of
Default has occurred under the Loan  Documents,  this Agreement or any documents
executed in connection  with this  Agreement  and, if so, stating the facts with
respect thereto.  Such  certificate  shall also state whether GSE Power and MSHI
are in compliance  with the terms and conditions of the Exim Guaranty,  the Exim
Borrower Agreement and the related Loan Authorization  Agreement.  The Borrowers
shall provide to the Lender and Exim such other  financial or other  information
as the Lender may request in its reasonable discretion from time to time.

     (d) Within one hundred  twenty (120) days from the end of each fiscal year,
GP  Strategies  shall  provide  to the  Lender  and  Exim a copy of its 10-K and
ManTech shall provide to the Lender and Exim the consolidated balance sheets and
income and expense statements of ManTech together with its subsidiaries  audited
by a national  independent  certified public  accountant firm. Within sixty (60)
days from the end of each fiscal  quarter,  GP  Strategies  shall provide to the
Lender and Exim a copy of its 10 Q SEC reports and ManTech  shall provide to the
Lender  and  Exim  the  consolidated  balance  sheets  and  income  and  expense
statements of Mantech in the same form currently being provided to the Lender in
connection  with a separate  loan made by the Lender to  ManTech.  If the Lender
desires  additional  financial  information  from GP Strategies and ManTech,  GP
Strategies  and  ManTech  will  permit  the  Lender's   officers  or  authorized
representatives  or accountants to discuss GP Strategies' and ManTech's affairs,
finances and accounts with their  respective  officers at such reasonable  times
during  normal  business  hours,  and as often as the Lender may desire.  In the
event GP Strategies and/or ManTech refuses to so discuss such affairs,  finances
and accounts or promptly  provide such  supplemental  material as the Lender may
reasonably  request  during  such  discussions,  an  Event of  Default  shall be
conclusively  deemed to have occurred,  and the Lender may proceed to assert its
rights under this  Agreement,  any documents  executed in  connection  with this
Agreement or the Loan Documents as if such Event of Default had occurred without
regard to whether an Event of Default has actually occurred.

     (e) The Borrowers shall provide to the Lender such other financial or other
information as the Lender may request in its reasonable  discretion from time to
time.

     15. Primary Depository Account.  The Borrowers shall maintain their primary
depository accounts with the Lender.

     16. Cross-Default and Cross-Collateralization.

     (a) A default  under the GSE Power Line of Credit shall be a default  under
the GSE Process Line of Credit.  A default  under the GSE Process Line of Credit
shall be a default under the GSE Power Line of Credit.

     (b) The  collateral  covered by the GSE Power Line of Credit  Agreement and
the GPI Security  Agreement shall also secure the GSE Process Line of Credit and
the GSE Process Letter of Credit. The collateral covered by the GSE Process Line
of Credit  Agreement  shall also secure the GSE Power Line of Credit and the GSE
Power Letter of Credit.  The term  "Borrower's  Obligations"  as used in the GSE
Power Line of Credit Agreement shall mean collectively  "Borrower's Obligations"
as  defined  in  the  GSE  Power  Line  of  Credit   Agreement  and  "Borrower's
Obligations"  as defined in the GSE Process Line of Credit  Agreement.  The term
"Borrower's  Obligations"  as used in the GSE Process  Line of Credit  Agreement
shall mean collectively  "Borrower's  Obligations" as defined in the GSE Process
Line of Credit  Agreement  and  "Borrower's  Obligations"  as defined in the GSE
Power Line of Credit  Agreement.  The term  "Liabilities"  as defined in the GPI
Security  Agreement  shall mean  "Liabilities"  as  defined in the GPI  Security
Agreement and shall also include the  obligations of GPI as guarantor of the GSE
Process Line of Credit pursuant to its Amended and Restated Guaranty executed in
connection  with  this  Agreement.  The  Borrowers  and GPI  hereby  assign  and
reassign,  pledge and repledge and grant and regrant to the Lender,  and confirm
that the Lender has a perfected and continuing  security interest,  in, and lien
on the  following:  (a) all of the  Borrowers'  and GPI's  Accounts,  Inventory,
Chattel Paper, Documents,  Instruments,  General Intangibles (including, without
limitation,  all tax refunds), and Equipment (whether or not fixtures),  whether
now owned or existing or  hereafter  acquired  or  arising,  other than  vehicle
leases and equipment leases,  (b) all returned,  rejected or repossessed  goods,
the sale or lease of which  shall have given or shall give rise to an Account or
Chattel Paper,  (c) all insurance  policies  relating to the foregoing,  (d) all
books and records in whatever media (paper, electronic or otherwise) recorded or
stored,  with respect to the foregoing and all equipment and general intangibles
necessary  or  beneficial  to retain,  access  and/or  process  the  information
contained  in  those  books  and  records,  (e) the  Lockboxes,  the  Borrowers'
Accounts,  the Restricted  Accounts,  and any other account maintained by any of
the Borrowers or GPI with the Lender and all cash held therein; and (f) all cash
and non-cash proceeds and products of the foregoing,  as security for all of the
Borrowers'  indebtedness  under  the  Lines of  Credit,  the  Letter  of  Credit
Agreements (or any  obligations  related to the Letters of Credit) and all other
obligations of the Obligors under any of the Loan  Documents,  this Agreement or
any documents executed in connection with this Agreement.

     17. Guaranties.  GSE and GPI shall continue to guarantee the GSE Power Line
of Credit.  GSE shall continue to guarantee the GSE Process Line of Credit.  GSE
B.V.,  GSE  Singapore,  GSE Belgium,  GP  Strategies  and  ManTech,  jointly and
severally,  shall  continue to  guarantee  the GSE Process Line of Credit and in
addition  shall  guarantee  the GSE Power Line of Credit.  The liability of GSE,
GPI,  GSE B.V.,  GSE  Singapore  and GSE  Belgium  is and shall  continue  to be
unlimited.  The liability of GP Strategies  and ManTech is and shall continue to
be limited to $1,500,000  each, which shall increase by an amount equal to fifty
percent  (50%) of any amounts drawn by the  beneficiary  of Letter of Credit No.
405600  and/or any  replacement  for such  Letter of Credit  issued  pursuant to
paragraph  10  hereof on or prior to their  respective  expiration  dates.  Such
increases  shall  be  effective  immediately  and  automatically  upon  any such
draw(s).  GSE Power and GSE Process shall also  guarantee the Lines of Credit of
each other. In addition, all other affiliates and subsidiaries of GSE, GSE Power
and GSE Process  (the  "Additional  Guarantors")  shall  jointly  and  severally
guarantee the Lines of Credit, such guarantees to be unlimited.

     18. MIDFA  Guaranty.  The Borrowers  shall use their best efforts to obtain
$1,000,000  in insurance  from the  Maryland  Industrial  Development  Financing
Authority  ("MIDFA")  for the Lines of  Credit.  The  Borrowers  shall be solely
responsible for obtaining the MIDFA guarantee and for paying any premiums,  fees
or other costs related  thereto.  Commencing on January 1, 1999 and on the first
day of each month  thereafter  until the Lines of Credit have been paid in full,
the  Borrowers  shall provide to the Lender a written  status  report  detailing
these efforts, together with copies of all correspondence,  agreements and other
writings related to such efforts.

     19.  Audits of  Collateral.  The  Borrowers  shall permit the Lender or any
agent or representative  thereof,  at any reasonable time and from time to time,
to  conduct a field  audit of the  inventory  and a book  audit of the  accounts
receivable  and other  collateral at least twice between the date of closing and
the Maturity Date. The Obligors shall be responsible  for all costs and expenses
associated with such audits,  which shall be deemed to be obligations  which are
secured by the Loan  Documents,  as amended by this  Agreement and the documents
executed in connection with this Agreement.

     20.  Refinancing.  The  Borrowers  shall use their  best  efforts to secure
refinancing or seek debt and/or equity in amounts  sufficient to satisfy in full
the Lines of Credit on or prior to the Maturity Date.  Commencing on January 15,
1999 and on the fifteenth day of each month thereafter until the Lines of Credit
have been paid in full,  the  Borrowers  shall  provide  to the Lender a written
status report  detailing  these efforts,  together with copies of all supporting
documentation,  including  all  material  correspondence,  agreements  and other
writings related to such efforts.

     21.  Press  Releases.  The  Borrowers  shall  provide  the  Lender  and the
Export-Import  Bank with copies of all press  releases  relating to the Obligors
and any subsidiaries or affiliates of the Obligors  contemporaneously with their
release.

     22. Additional Documentation/Post-Closing Items.

     (a)  Contemporaneously  with the  execution  hereof,  the  Borrowers  shall
execute  modifications of the Notes,  substantially in the forms attached hereto
as Exhibit A.
     (b)  Contemporaneously  with  the  execution  hereof,  the  Guarantors  and
Additional  Guarantors  shall  execute  guaranties,  substantially  in the forms
attached hereto as Exhibit B.
     (d) Within ten (10) days after the execution hereof,  the Borrowers and GPI
shall  deliver to the Lender a list of all of the  locations at which any of the
collateral is located,  the approximate value of the collateral  located at each
such location and a listing of the collateral located at each such location and,
within two (2) days of a request by the Lender shall  execute and deliver to the
Lender such amendments to the existing financing  statements and such additional
financing statements as the Lender may request.
     (e)  Within (2) days of a request  by the  Lender,  GSE Power and GPI shall
execute  and  deliver to the Lender  such  amendments/reaffirmations  of the GSE
Power  Assignment  of Patents  and the GPI  Assignment  of Patents  and  related
documents as the Lender may request.
     (f) Within five (5) days after the execution  hereof,  the Borrowers  shall
deliver to the Lender a letter signed by counsel for the Borrowers  stating that
(i) Ryan  Nuclear  Industries  (RNI) is a  division  of GSE  Power  and is not a
separately  organized legal entity;  (ii) Ryan Nuclear  Industries  (RNI) is the
same entity that the Borrowers  report on the borrowing base  certificates  that
the Borrowers submit to the Lender and (iii) GSE Process Solutions BV (KOREA) is
a division of GSE Process  Solutions  BV  (Netherlands)  and is not a separately
organized legal entity.

     23.  Resolutions of the  Obligors/Good  Standing.  Within fifteen (15) days
after the execution of this Agreement,  the Obligors shall deliver to the Lender
resolutions  prepared by the Obligors  evidencing their consent to the execution
of this Agreement and the documents  executed in connection with this Agreement.
Within ten (10) days after the execution of this  Agreement,  the Obligors shall
also obtain and deliver to the Lender current good standing certificates for all
of the  jurisdictions  in which the Obligors are incorporated or doing business.
Notwithstanding the foregoing,  GP Strategies and ManTech shall only be required
to obtain and deliver to the Lender, within ten (10) days after the execution of
this Agreement,  current good standing  certificates  for the  jurisdictions  in
which GP Strategies and ManTech are  incorporated  and for the State of Maryland
if GP Strategies or ManTech are doing business in Maryland.

     24. Representations and Warranties.  In order to induce the Lender to enter
into this  Agreement,  the  Obligors  represent  and  warrant  to the  Lender as
follows:


     (a)  Existing  Representations  and  Warranties.  The  representations  and
warranties  set forth in the Loan Documents are true and correct in all material
respects  (references to financial  statements of the Borrowers and GSE shall be
deemed to be references to the latest financial  statements of the Borrowers and
GSE) with the same effect as though made on and as of the date hereof, except to
the extent  that such  representations  and  warranties  expressly  relate to an
earlier date.

     (b) No Defaults or Events of Default.  The Borrowers are in compliance with
all  terms  and  provisions  of the Loan  Documents,  except  for the  financial
covenants set forth in Article X of the Line of Credit Agreements.

     (c)  Organization  and  Standing.   Each  Obligor  is  a  corporation  duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction  of its  incorporation,  with  corporate  power adequate to own and
operate the properties owned by it, to carry on the business conducted by it, to
enter  into  and  perform  this  Agreement  and to  carry  out the  transactions
contemplated hereby.

     (d)  Authorization  and  Validity.  The  execution  and  delivery  of  this
Agreement  by  each  of the  Obligors  and the  performance  of  each  Obligor's
obligations  hereunder have been duly authorized by proper  corporate action and
this  Agreement  constitutes  the legal,  valid and binding  obligations of each
Obligor and is enforceable in accordance with its terms.

     (e)  Compliance  with  Other  Instruments.  None  of  the  Obligors  are in
violation of any provision of its articles of  incorporation  or by-laws and are
not in default  under any existing  judgment or decree or of any  existing  law,
governmental order, rule or regulation  applicable to it, or of any agreement or
other  instrument  to which it is a party or by which it or its assets are bound
to the extent  that any such  violation  would  affect the ability of any of the
Obligors to perform any of their obligations under this Agreement, any documents
executed in connection with this Agreement or the Loan Documents in any material
respect.   Neither  the  execution  and  delivery  of  this  Agreement  nor  the
consummation of the transactions  herein  contemplated,  nor compliance with the
terms and provisions  hereof,  has constituted or resulted in or will constitute
or  result  in a breach of the  articles  of  incorporation  or  by-laws  of any
Obligor,  or the violation of any  presently  existing  applicable  governmental
requirement or will conflict or will be inconsistent  with or will result in any
breach of, any of the terms,  covenants,  conditions or provisions  thereof,  or
will  constitute  a  default  under,  any  indenture,  mortgage,  deed of trust,
instrument,  document, agreement or contract of any kind to which any Obligor is
a party or by which any  Obligor  may be bound or subject to the extent that any
such  breach or default  would  affect the  ability  of any of the  Obligors  to
perform any of their obligations under this Agreement, any documents executed in
connection with this Agreement or the Loan Documents in any material respect.

     (f) Assets. The Borrowers' and GPI's assets are not subject to any existing
liens or  encumbrances  except  that  granted to the  Lender  except as shown on
Exhibit C attached hereto.

     (g) No Claims,  etc. There are no claims,  defenses or setoffs with respect
to the Notes or with respect to any of the other Loan Documents, or with respect
to the  indebtedness  evidenced  or  secured  thereby  or  with  respect  to the
collection or  enforcement of any of the same (and to the extent any such claim,
setoff  or  defense  exists,  they are each  waived  and  relinquished  in their
entirety).

     (h) Disclosure. This Agreement and all agreements,  documents, certificates
or  statements  furnished  to the  Lender  by or on behalf  of the  Obligors  in
connection  with the  transactions  contemplated  hereby are true,  correct  and
complete and do not contain any untrue statement of material fact.

     (i) Benefit.  Each Obligor has derived direct or indirect benefit from this
Agreement and the transactions contemplated hereby.

     (j) Free Act and Will. The Obligors are not entering into this Agreement in
reliance upon any statement, representation or warranty of any nature whatsoever
made by the  Lender,  or any other  person or  entity  whatsoever,  which is not
expressly  stated  herein,  and each  Obligor  has entered  into this  Agreement
entirely of its own free act and will.

     (k) Ryan  Nuclear  Industries  (RNI).  Ryan Nuclear  Industries  (RNI) is a
division  of GSE Power and is not a  separately  organized  legal  entity.  Ryan
Nuclear  Industries  (RNI) is the same entity that the  Borrowers  report on the
borrowing base certificates that the Borrowers submit to the Lender.

     (l) GSE Process Solutions BV (KOREA). GSE Process Solutions BV (KOREA) is a
division of GSE  Process  Solutions  BV  (Netherlands)  and is not a  separately
organized legal entity.

     25.  Events  of  Default.  The  occurrence  of  one or  more  of any of the
following  events (the "Events of Default") shall constitute an Event of Default
under this Agreement:

     (a)  Failure to pay to the Lender  when due any  amounts  required  by this
Agreement or any document executed in connection with this Agreement.

     (b) Failure to comply with or perform as and when required,  or to observe,
any of the terms,  conditions  or  covenants  of this  Agreement or any document
executed in connection with this Agreement.

     (c) If any representation or warranty made herein, in any document executed
in  connection  with this  Agreement  or in any report,  certificate,  financial
statement or other instrument furnished in connection with this Agreement, shall
prove to have been materially false or misleading on the date as of which it was
made.

     (d) If the Lender  determines in good faith that a material  adverse change
has occurred in the financial  condition or business condition of GSE, GSE Power
and/or GSE Process.

     (e) If the Exim Guaranty has not been extended fourteen (14) days before it
is due to expire;

     (f) If the Exim Guaranty otherwise ceases to be in full force and effect or
a default occurs thereunder or under the Exim Borrower Agreement.

     (g) If any of the  Letters  of  Credit  are  drawn  and not  repaid  by the
Borrowers immediately upon demand by the Lender.

     (h) If the Borrower fails to provide  satisfactorily,  in the Lender's sole
determination,  for the Borrower's year 2000  compatibility  and the same is not
cured within thirty (30) days after written notice thereof.

     (i)  If a  default  which  remains  uncured  after  the  expiration  of any
applicable  cure  period  or an Event of  Default  occurs  under any of the Loan
Documents and such default shall not be cured within any applicable cure periods
set forth therein.

     26. Remedies.  Immediately upon the occurrence of any Event of Default, the
Lender shall have the right to exercise any and all rights available to it under
this Agreement,  any document  executed in connection with this Agreement or any
of the Loan Documents and applicable  law. All rights and remedies  available to
the Lender under this Agreement,  any document  executed in connection with this
Agreement  or any of the  Loan  Documents  and  applicable  law may be  asserted
concurrently,  cumulatively or  successively,  from time to time, as long as the
parties hereto shall be indebted to the Lender.

     27.  Release.  Each  Obligor,  for  itself  and  its  directors,  officers,
employees,  agents,  members,  predecessors,   successors  and  assigns,  hereby
releases and forever waives and relinquishes all claims,  demands,  obligations,
liabilities and causes of action of whatsoever kind or nature,  whether known or
unknown,  which it or he has,  may have or might  have or  assert  now or in the
future  against the Lender  and/or any  affiliates  or entities  related to such
entity,  and any of the directors,  officers,  employees,  agents,  predecessors
(including  CoreStates Bank, N.A.),  successors and assigns, as the case may be,
of  all  such  entities,  in  connection  with,  directly  or  indirectly,  this
Agreement,  the Loan  Documents,  any document  executed in connection with this
Agreement or any  transactions  contemplated  hereby or thereby,  any prior loan
made or credit  extended  to the  Borrowers  by the Lender or  otherwise  to any
relationship between any Obligor and the Lender.

     28.  Further  Assurances  and  Corrective  Instruments.  The Obligors  will
execute, acknowledge and deliver, from time to time, such supplements hereto and
such  further  instruments  and  documents,  as the  Lender  may  require in its
reasonable  discretion to protect,  perfect and enforce the Lender's interest in
any  collateral  security for the Lines of Credit or to facilitate  the carrying
out of the intentions of the parties to this Agreement.

     29. Waiver of Trial by Jury. Each Obligor and the Lender hereby waive trial
by jury in any action or  proceeding  to which any Obligor and the Lender may be
parties,  arising out of or in any way pertaining to this Agreement,  any of the
documents  executed in connection with this Agreement or the Loan Documents.  It
is agreed and understood that this waiver  constitutes a waiver of trial by jury
of all claims  against all  parties to such  actions or  proceedings,  including
claims  against  parties who are not parties to this  Agreement.  This waiver is
knowingly,  willingly  and  voluntarily  made by each  Obligor and each  Obligor
hereby represents that no  representations  of fact or opinion have been made by
any individual to induce this waiver of trial by jury or to in any way modify or
nullify its effect. Each Obligor further represents that it has been represented
or has had the  opportunity  to be  represented in the signing of this Agreement
and in the making of this waiver by independent  legal counsel,  selected of its
own free will,  and that it has had the  opportunity to discuss this waiver with
counsel.

     30. Bankruptcy.

     (a) Each of the  Borrowers  and GPI warrants and  represents  to the Lender
that it has no present  intent (i) to file any voluntary  petition in bankruptcy
under any Chapter of the Bankruptcy  Code or directly or indirectly to cause any
of the  Borrowers,  GPI or any other person or entity that may hereafter own any
interest in, or claim any  beneficial  interest in, any collateral for the Lines
of Credit, to file any voluntary petition in bankruptcy under any Chapter of the
Bankruptcy Code or to have any involuntary  petition in bankruptcy filed against
it under any Chapter of the  Bankruptcy  Code or (ii) in any manner  directly or
indirectly to cause any of the Borrowers, GPI or any other person or entity that
may  hereafter  own any  interest in, or claim any  beneficial  interest in, any
collateral for the Lines of Credit, to seek relief, protection,  reorganization,
liquidation,  dissolution,  or similar  relief for  debtors  under any  federal,
state, or local law, or in equity, or (iii) in any manner directly or indirectly
to cause any of the  collateral for the Lines of Credit to be the subject of any
bankruptcy  or  insolvency  proceedings  or the  property of any  bankruptcy  or
insolvency estate.

     (b) Each of the Borrowers and GPI acknowledges and agrees that in the event
the collateral for the Lines of Credit or any portion  thereof shall ever become
the  subject of any  bankruptcy  or  insolvency  estate,  then the Lender  shall
immediately  become  entitled,  among  other  relief to which the  Lender may be
entitled under this  Agreement,  the Loan Documents,  the documents  executed in
connection with this Agreement and at law or in equity,  to obtain upon ex parte
application  therefor and without  further  notice or action of any kind, (i) an
order from the court  prohibiting the use by the trustee in bankruptcy or by any
of  the  Borrowers  or  GPI as  debtor  in  possession  of  the  Lender's  "cash
collateral"  (as such term is defined in Section 363 of the Bankruptcy  Code) in
connection  with the Lines of Credit,  and (ii) an order from the court granting
immediate  relief  from  the  automatic  stay  pursuant  to  Section  362 of the
Bankruptcy  Code so as to permit  the Lender to  exercise  all of its rights and
remedies pursuant to this Agreement,  the Loan Documents, the documents executed
in  connection  with this  Agreement  and at law and in equity,  and each of the
Borrowers  and GPI  further  acknowledges  and  agrees  that the  occurrence  or
existence of any Event of Default under this Agreement  shall, in and of itself,
constitute "cause" for relief from the automatic stay pursuant to the provisions
of Section 362(d)(1) of the Bankruptcy Code.

     (c) Each of the Borrowers and GPI further  acknowledges  and agrees that in
the event of the filing of any voluntary or  involuntary  petition in bankruptcy
by or against any of the  Borrowers or GPI,  none of the  Borrowers or GPI shall
assert or request any other party to assert that the automatic  stay provided by
Section 362 of the  Bankruptcy  Code shall  operate or be  interpreted  to stay,
interdict,  condition,  reduce,  or inhibit the ability of the Lender to enforce
any  rights  it has by  virtue  of this  Agreement  the  Loan  Documents  or the
documents  executed in connection with this  Agreement,  or any other rights the
Lender has,  whether  now or  hereafter  acquired,  against any person or entity
which is not a debtor in such  bankruptcy  proceedings  or against any  property
owned by any such  non-debtor;  and further  that, in the event of the filing of
any  voluntary or  involuntary  petition in  bankruptcy by or against any of the
Borrowers or GPI, none of the Borrowers or GPI shall seek a supplemental stay or
any other relief,  whether  injunctive or otherwise,  pursuant to Section 105 of
the  Bankruptcy  Code or any other  provision of the  Bankruptcy  Code, to stay,
interdict,  condition,  reduce,  or inhibit the ability of the Lender to enforce
any rights it has by virtue of this Agreement, the Loan Documents, the documents
executed in connection with this Agreement or at law or in equity,  or any other
rights the Lender has, whether now or hereafter acquired,  against any person or
entity  which is not a debtor in such  bankruptcy  proceedings,  or against  any
property owned by any such non-debtor.

     31.  Consent to Assignment of Lines of Credit and  Disclosure of Documents.
Each of the Obligors consents to the sale and assignment by the Lender of any or
all of their  interest in the Lines of Credit at any time in the  Lender's  sole
and  absolute  discretion.  Within  fifteen  (15)  days  after  any such sale or
assignment, the Lender shall provide the Obligors with notice of the name of the
individual or entity  purchasing such Lines of Credit.  In conjunction with such
assignment,  each of the  Obligors  consents  to the  disclosure  of any and all
books,  records,  files,  loan agreements,  notes,  deeds of trust,  guaranties,
financing statements, assignments of leases, statements, ledger cards, signature
cards,  corporate and/or partnership  documents,  financial statements,  leases,
appraisals, environmental audits, hazard and liability insurance policies, title
insurance policies, loan payment histories, income tax returns, credit analyses,
notes,  correspondence,  internal memoranda, checks, deposit account records and
other documents which are in the Lender's  possession or control or to which the
Lender is entitled under the terms of this Agreement,  any documents executed in
connection  with this Agreement or the Loan  Documents  relating to the Lines of
Credit to prospective assignees.

     32. Power of Attorney. Each of the Obligors makes, constitutes and appoints
the Lender and any agent of the  Lender  designated  by the Lender as their true
and lawful  attorney-in-fact  with full power and authority to endorse,  execute
and sign for them and in their name all  documents  and writings  which they are
required to execute and deliver to the Lender under this Agreement, any document
executed in  connection  with this  Agreement or the Loan  Documents,  which the
Lender deems necessary or appropriate to create, perfect, preserve,  protect, or
enforce the  Lender's  security  interest or rights  under this  Agreement,  any
document  executed in  connection  with this  Agreement  or the Loan  Documents.
Notwithstanding  the foregoing,  the Lender agrees not to exercise the foregoing
power  unless the Obligors  have not complied  with any request by the Lender to
endorse or execute such  documents and writings and delivered  such endorsed and
executed  documents and writings to the Lender within five (5) days of a request
by the Lender.

     33. Year 2000 Compatibility. By June 30, 1999, the Borrowers shall take all
reasonable action necessary to assure that the Borrowers'  computer-based system
is able to operate and effectively  process data (including  dates) on and after
January 1, 2000, in order to (a) conduct  normal  internal  business  operations
(i.e.,  processing of timesheets,  running of payroll, the operation of internal
automated  financial  operations and human resources computer systems,  periodic
progress  reports for work  performed  and  invoices to enable  payment for work
performed),  and (b) avoid any  material  adverse  effect  that may occur to any
Borrower's  business  operations  performed  for the benefit of such  Borrower's
customers as a result of any Borrower's  failure to provide  satisfactorily,  in
the Lender's sole  determination,  for such Borrower's year 2000  compatibility.
All such  systems (i) shall not cease to perform or provide (and shall not cause
any software  and/or system which is material to the operations of such Borrower
or any  interface  therewith  to  provide)  invalid  or  incorrect  results as a
consequence  of date  functionality  and/or data;  (ii) shall not experience any
degradation  of performance  or  functionality  arising from or relating to date
functionality  and/or data which is material to the  operations of such Borrower
or any material interface therewith and which represents or references different
centuries,  more than one century or leap years;  (iii)  shall  effectively  and
accurately  manage and  manipulate  data which is material to the  operations of
such  Borrower or any material  interface  therewith  and used by such  business
computer  related systems and derived from,  involving or relating in any way to
dates,  including  single  century  formulas  and  multi-century  or  leap  year
formulas;  and (iv) shall not cause an  abnormal  ending  scenario  within  such
business  computer  related  systems or in any software and/or system with which
such  systems  interface  (or  generate  incorrect  values  or  invalid  results
involving  such  dates)  that  could  have a  material  adverse  effect  on such
Borrower's  business  operations.  By February 28,  1999,  the  Borrowers  shall
provide the Lender with an assessment  with respect to the Borrowers'  year 2000
vulnerability.  By March 31, 1999,  the Borrowers  shall provide the Lender with
its written plan setting  forth in  reasonable  detail the actions the Borrowers
intend to take to  ensure  the  Borrowers'  year  2000  compatibility  and shall
provide the Lender quarterly, or more frequently upon the Lender's request, with
reports evidencing the Borrowers'  progress toward year 2000  compatibility.  By
June 30, 1999, the Borrowers shall also provide the Lender with its written plan
setting  forth in  reasonable  detail a  contingency  plan in the event that the
Borrowers have not completed the actions the Borrowers  intend to take to ensure
year 2000  compatibility by December 31, 1999. The Borrowers' failure to provide
satisfactorily, in the Lender's sole determination, for the Borrowers' year 2000
compatibility shall be an Event of Default.

     34. Miscellaneous.

     (a) Waivers by the Lender. Neither any failure nor any delay on the part of
the Lender in exercising any right,  power or remedy under this  Agreement,  any
documents  executed in connection with this Agreement or the Loan Documents,  or
under  applicable law shall operate as a waiver  thereof,  nor shall a single or
partial exercise thereof preclude any other or further  exercises thereof or the
exercise of any other right,  power or remedy.  No waiver or  forbearance by the
Lender as to any of the  Obligors  shall  waive or release  any rights or claims
which the Lender may now have or hereafter  have against any other person,  firm
or  individual.  The Lender  reserves all rights except to the extent  expressly
provided herein.

     (b)  Modifications.  No  modification  or waiver of any  provision  of this
Agreement,  any documents executed in connection with this Agreement or the Loan
Documents,  and no  consent  by the  Lender  to any  departure  by the  Obligors
therefrom  shall in any event be effective  unless the  modification,  waiver or
consent shall be in writing.  Any such waiver or consent shall be effective only
in the specific  instance or for the purpose for which  given.  No notice to, or
demand upon the Obligors in any case shall  entitle the Obligors to any other or
further notice or demand in the same, similar or other circumstances.

     (c) No  Novation.  Nothing  set  forth in this  Agreement  or in any of the
documents  executed in connection with this Agreement shall cause a novation nor
shall it extinguish,  terminate,  or impair the Obligors'  obligations under the
Loan Documents, as amended by this Agreement, or affect the priority of the lien
of the Lender established by the Loan Documents.

     (d) Applicable Law. The  performance,  construction and enforcement of this
Agreement, the documents executed in connection with this Agreement and the Loan
Documents shall be governed by the laws of the State of Maryland.

     (e)  Survival;   Successors  and  Assigns.   All   covenants,   agreements,
representations  and  warranties  made  herein,  in any  documents  executed  in
connection  with this Agreement and in the Loan Documents shall continue in full
force and effect.  Whenever in this Agreement any of the parties is referred to,
such  reference  shall be deemed to include the  successors  and assigns of such
party. All covenants, agreements, representations and warranties by or on behalf
of the Obligors which are contained in this Agreement, in any documents executed
in  connection  with this  Agreement and the Loan  Documents  shall inure to the
benefit of the Lender and its successors and assigns.

     (f) Severability. If any term, provision or condition, or any part thereof,
of this Agreement,  any documents  executed in connection with this Agreement or
the Loan  Documents  shall  for any  reason  be found or held to be  invalid  or
unenforceable  by any court or  governmental  agency of competent  jurisdiction,
such invalidity or  enforceability  shall not affect the remainder of such term,
provision  or  condition or any other term,  provision  or  condition,  and this
Agreement, any documents executed in connection with this Agreement and the Loan
Documents  shall  survive and be construed  as if such invalid or  unenforceable
term, provision or condition had not been contained therein.

     (g) Merger and  Integration.  This  Agreement,  any  documents  executed in
connection  with  this  Agreement  and the Loan  Documents  contain  the  entire
agreement  of the  parties  hereto with  respect to the matters  covered and the
transactions  contemplated hereby, and no other agreement,  statement or promise
made by any party  hereto,  or any employee,  officer,  agent or attorney of any
party hereto, shall be valid or binding.

     (h) Headings. The headings and subheadings contained in the titling of this
Agreement are intended to be used for convenience  only and shall not be used or
deemed to limit or diminish any of the provisions hereof.

     (i) Gender,  Singular. All references made (a) in the neuter,  masculine or
feminine  gender shall be deemed to have been made in all such genders,  and (b)
in  the  singular  or  plural   number  shall  be  deemed  to  have  been  made,
respectively, in the plural or singular number as well.

     (j) Time of Essence. Time is of the essence of this Agreement.

     35. Notices.  Any notices  required or permitted by this Agreement shall be
in writing and shall be deemed  delivered  if hand  delivered  or  delivered  by
certified mail, postage prepaid,  return receipt  requested,  or by facsimile or
telegraph  as  follows,  unless  such  address  is  changed  by  written  notice
hereunder:

     If to the Obligors: GSE Systems, Inc.

     9189 Red Branch Road
     Columbia, MD  21045
     Facsimile:        (410) 772-3641
     Attention:        Steve Fogarty
     Senior Vice President/Chief Financial Officer

     If to ManTech:             ManTech International  Corporation
                                12015 Lee Jackson Highway
                                8th Floor
                                Fairfax, VA  22033-3300
                                Attention:        Jodee E. Batdorf, Esquire

     If to GP Strategies:       GP Strategies Corporation
                                9 West 57th Street
                                Suite 4170
                                New York, New York
                                Attention:        Andrea D. Kantor, Esquire

     with a copy to:            Hedy L. Nelson, Esquire
                                1899 L Street, N.W.
                                Third Floor
                                Washington, D.C.  20036

     If to the Lender:          First Union National Bank
                                1970 Chain Bridge Road
                                7th Floor
                                McLean, Virginia  22102
                                Facsimile: (703) 760-5817
                                Attention:        David A. Dix
                                Vice President

     with a copy to:            Piper & Marbury L.L.P.
                                36 South Charles Street
                                Baltimore, Maryland 21201
                                Facsimile: (410) 576-5055
                                Attention:  Richard M. Kremen, Esquire

     36.  Counterparts.  This  Agreement may be executed  simultaneously  in any
number of  counterparts,  each of which shall be deemed an original,  but all of
which shall constitute one in the same agreement.

     37. Condition  Precedent to  Effectiveness.  Within five (5) days after the
execution  of this  Agreement,  the  Borrowers  shall  obtain and provide to the
Lender the written consent of Exim to this Agreement and the documents  executed
in connection with this Agreement.  This Agreement and the documents executed in
connection  with this Agreement  shall be effective as of January 1, 1999 on the
earlier of the date the  Borrowers  provide such written  consent of Exim to the
Lender or the date which is five (5) business days after Exim receives a written
request  for such  consent  in the  event  that Exim  does not  respond  to such
request. In the event that the Borrowers fail to obtain and provide such written
consent of Exim to the Lender  within five (5) days after the  execution of this
Agreement,  this  Agreement and the documents  executed in connection  with this
Agreement shall not become  effective.  In such event, the Lines of Credit shall
have  matured  on  December  31,  1998 and the  Lender  shall  have the right to
exercise any and all rights  available to it under any of the Loan Documents and
applicable law.

     IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  or caused to be
executed, this Agreement under seal as of the date first written above.

WITNESS/ATTEST: BORROWERS:                  GSE POWER SYSTEMS, INC.
                                            f/k/a Simulation, Systems & Services
                                                  Technologies Company


                                            By:/S/   STEPHEN J. FOGARTY  (SEAL)
- ---------------------------------              --------------------------------
                                               Name: Stephen J. Fogarty
                                                    ---------------------------
                                              Title: Senior Vice President
                                                    ---------------------------


                                            MSHI, INC.



                                            By:/S/   STEPHEN J. FOGARTY  (SEAL)
- ----------------------------------             -------------------------------- 

                                               Name: Stephen J. Fogarty
                                                    ---------------------------

                                              Title: Senior Vice President
                                                     --------------------------


                                            GSE PROCESS SOLUTIONS, INC.



                                            By:/S/   STEPHEN J. FOGARTY  (SEAL)
- -----------------------------------            --------------------------------

                                               Name: Stephen J. Fogarty
                                                    ---------------------------

                                              Title: Senior Vice President
                                                     --------------------------
GUARANTORS:



                                            GSE SYSTEMS, INC.


                                            By:/S/   STEPHEN J. FOGARTY  (SEAL)
- -----------------------------------            --------------------------------

                                               Name: Stephen J. Fogarty
                                                    ---------------------------
                                            
                                              Title: Senior Vice President
                                                    ---------------------------


                                            GP INTERNATIONAL ENGINEERING
                                                              & SIMULATION, INC.


                                            By:/S/   STEPHEN J. FOGARTY  (SEAL)
- -----------------------------------            -------------------------------- 

                                               Name: Stephen J. Fogarty
                                                    ---------------------------
      
                                              Title: Senior Vice President  
                                                    ---------------------------

                                            GP STRATEGIES CORPORATION


                                            By:/S/   SCOTT GREENBERG     (SEAL)
- ------------------------------------           -------------------------------- 
                                               Name: Scott Greenberg
                                                    --------------------------- 
                                              Title: Executive Vice President
                                                    ---------------------------

                                            MANTECH INTERNATIONAL CORPORATION


                                            By:/S/   MATTHEW P. GALASKI   (SEAL)
- ------------------------------------           --------------------------------
               
                                               Name: Matthew P. Galaski
                                                    ---------------------------

                                              Title: Vice President
                                                    ---------------------------


                                            GSE PROCESS SOLUTIONS B.V.


                                            By:/S/   STEPHEN J. FOGARTY   (SEAL)
- ------------------------------------           --------------------------------

                                               Name: Stephen J. Fogarty
                                                    ---------------------------

                                              Title: Senior Vice President
                                                    ---------------------------


                                            GSE PROCESS SOLUTIONS
                                                         SINGAPORE (PTE) LIMITED



                                            By:/S/CHRISTOPHER M. CARNAVOS (SEAL)
- -------------------------------------          --------------------------------

                                               Name:Christopher M. Carnavos
                                                    ---------------------------

                                              Title:Director
                                                    ---------------------------


                                            GSE PROCESS SOLUTIONS BELGIUM NV


                                            By:/S/   STEPHEN J. FOGARTY   (SEAL)
- --------------------------------------         --------------------------------

                                               Name: Stephen J. Fogarty
                                                    ---------------------------

                                              Title: Director
                                                    ---------------------------


LENDER: FIRST UNION NATIONAL BANK


                                             By:/S/  DAVID A. DIX         (SEAL)
                                                -------------------------------
                    
                                                Name:David A. Dix
                                                     --------------------------

                                               Title:Vice President
                                                     -------------------------




STATE OF ______________________     
                                              SS:
CITY/COUNTY OF ________________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to  be  the  ____________________  of  GSE  Power
Systems,  Inc., f/k/a Simulation,  Systems & Services  Technologies Company, and
that (s)he, in such capacity,  being authorized to do so, executed the foregoing
instrument for the purposes therein contained,  by signing the name of GSE Power
Systems, Inc., as ____________________ of GSE Power Systems, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                              ---------------------------------
                                              Notary Public
My Commission expires:


STATE OF ______________________     
                                              SS:
CITY/COUNTY OF ________________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself to be the  ____________________ of MSHI, Inc., and
that (s)he, in such capacity,  being authorized to do so, executed the foregoing
instrument  for the  purposes  therein  contained,  by signing the name of MSHI,
Inc., as ____________________ of MSHI, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                             ----------------------------------
                                             Notary Public
My Commission expires:



STATE OF ______________________     
                                             SS:
CITY/COUNTY OF _______________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of  GSE  Process
Solutions,  Inc., and that (s)he, in such capacity,  being  authorized to do so,
executed the foregoing instrument for the purposes therein contained, by signing
the name of GSE Process Solutions,  Inc., as ____________________ of GSE Process
Solutions, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                                              ---------------------------------
                                              Notary Public
My Commission expires:


STATE OF ______________________   
                                              SS:
CITY/COUNTY OF _______________     

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of GSE  Systems,
Inc., and that (s)he, in such capacity,  being authorized to do so, executed the
foregoing instrument for the purposes therein contained,  by signing the name of
GSE Systems, Inc., as ____________________ of GSE Systems, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                                               --------------------------------
                                               Notary Public
My Commission expires:



STATE OF ______________________     
                                                SS:
CITY/COUNTY OF _______________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself to be the ____________________ of GP International
Engineering  &  Simulation,  Inc.,  and  that  (s)he,  in such  capacity,  being
authorized to do so, executed the foregoing  instrument for the purposes therein
contained,  by signing the name of GP  International  Engineering  & Simulation,
Inc., as ____________________ of GP International Engineering & Simulation, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                              
                                               --------------------------------
                                               Notary Public
My Commission expires:


STATE OF ______________________     
                                               SS:
CITY/COUNTY OF ________________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of GP Strategies
Corporation,  and that  (s)he,  in such  capacity,  being  authorized  to do so,
executed the foregoing instrument for the purposes therein contained, by signing
the name of GP Strategies Corporation,  as ____________________ of GP Strategies
Corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                                               --------------------------------
                                               Notary Public
My Commission expires:




STATE OF ______________________     
                                               SS:
CITY/COUNTY OF ________________     

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged   himself/herself  to  be  the   ____________________   of  ManTech
International Corporation, and that (s)he, in such capacity, being authorized to
do so, executed the foregoing instrument for the purposes therein contained,  by
signing the name of ManTech International  Corporation,  as ____________________
of ManTech International Corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                                  
                                               --------------------------------
                                               Notary Public
My Commission expires:


STATE OF ______________________     
                                               SS:
CITY/COUNTY OF ________________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of  GSE  Process
Solutions  B.V., and that (s)he,  in such capacity,  being  authorized to do so,
executed the foregoing instrument for the purposes therein contained, by signing
the name of GSE Process Solutions B.V., as  ____________________  of GSE Process
Solutions B.V.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                               
                                               --------------------------------
                                               Notary Public
My Commission expires:



STATE OF ______________________ 
                                               SS:
CITY/COUNTY OF _______________  

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of  GSE  Process
Solutions  Singapore  (PTE) Limited,  and that (s)he,  in such  capacity,  being
authorized to do so, executed the foregoing  instrument for the purposes therein
contained, by signing the name of GSE Process Solutions Singapore (PTE) Limited,
as ____________________ of GSE Process Solutions Singapore (PTE) Limited.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                   
                                               --------------------------------
                                               Notary Public 
My Commission expires:


STATE OF ______________________    
                                               SS:
CITY/COUNTY OF _______________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of  GSE  Process
Solutions  Belgium NV, and that (s)he, in such capacity,  being authorized to do
so, executed the foregoing  instrument for the purposes  therein  contained,  by
signing the name of GSE Process Solutions Belgium NV, as ____________________ of
GSE Process Solutions Belgium NV.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                                               --------------------------------
                                               Notary Public
My Commission expires:



STATE OF ______________________
                                               SS:
CITY/COUNTY OF ________________      

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the undersigned officer,  personally appeared David A. Dix, who acknowledged
himself to be a Vice  President of First Union  National  Bank,  and that he, in
such capacity,  being authorized to do so, executed the foregoing instrument for
the  purposes  therein  contained,  by signing the name of First Union  National
Bank, as a Vice President of First Union National Bank.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                               --------------------------------
                                               Notary Public
My Commission expires:



                                                                   Exhibit 10.19
                              UNCONDITIONAL GUARANTY


     THIS  UNCONDITIONAL  GUARANTY (this "Guaranty") is made as of the _____ day
of January, 1999 by GSE SYSTEMS, INC., a Delaware corporation (the "Guarantor"),
in favor of FIRST UNION  NATIONAL BANK (the  "Lender,"  which term shall include
any subsequent holder of the Notes (as defined below)).

                                    Recitals

     A. $7,000,000 GSE Power Line of Credit

     A-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000 (the "GSE Power Line of Credit") to GSE Power Systems, Inc. (f/k/a
Simulation,  Systems & Services  Technologies  Company),  a Delaware corporation
("GSE  Power") and MSHI,  INC., a Virginia  corporation  ("MSHI")  pursuant to a
Letter of Credit, Loan and Security Agreement dated January 30, 1996, as amended
from time to time (the "GSE Power Line of Credit Agreement"). The GSE Power Line
of Credit is  evidenced  by a  Promissory  Note dated  January  30,  1996 in the
original principal amount of $7,000,000,  as amended from time to time (the "GSE
Power Line of Credit Note").

     A-2.  Pursuant to the GSE Power Line of Credit  Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit. In connection therewith, GSE Power and MSHI entered into separate Master
Letter of Credit  Agreements dated January 30, 1996, in favor of the Lender (the
"GSE Power Letter of Credit Agreements").

     A-3. The GSE Power Line of Credit  Agreement,  the GSE Power Line of Credit
Note,  the GSE  Power  Letter  of  Credit  Agreements  and all  other  documents
evidencing, securing, guaranteeing or otherwise related to the GSE Power Line of
Credit are collectively called the "GSE Power Loan Documents".

     A-4. As of December 18, 1998, exclusive of any amounts which may become due
in connection with the GSE Power Letter of Credit Agreements, there is due under
the GSE Power Line of Credit  principal of Five Million Eight  Hundred  Thousand
Nine Hundred and 00/100  Dollars  ($5,800,900.00)  and interest of  Twenty-Three
Thousand Six Hundred Fifty-Five and 00/100 Dollars ($23,655.00), plus attorneys'
fees and other costs which are payable under the GSE Power Loan Documents.

     A-5. Pursuant to Article III of the GSE Power Line of Credit Agreement, and
included  within the maximum  amount  available  to be borrowed by GSE Power and
MSHI under the GSE Power Line of Credit,  there is outstanding  Letter of Credit
No. SM406588 in the face amount of $180,243 issued by the Lender for the benefit
of Central  Trust of China  Procurement  Department  (the "GSE  Power  Letter of
Credit").

     B. $3,000,000 GSE Process Line of Credit

     B-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000  (subsequently  reduced to  $3,000,000)  (the "GSE Process Line of
Credit") to GSE Process Solutions, Inc., a Delaware corporation ("GSE Process"),
pursuant to a Letter of Credit,  Loan and Security  Agreement  dated January 31,
1995, as amended and restated by an Amended and Restated Letter of Credit,  Loan
and Security Agreement dated October 13, 1995, as amended by an Amendment Number
One to Amended and Restated  Letter of Credit,  Loan and Security  Agreement and
Promissory  Note dated  February  23, 1996  ("Amendment  Number  One") and by an
Amendment Number Two to Amended and Restated Letter of Credit, Loan and Security
Agreement and Promissory Note dated November 11, 1997  ("Amendment  Number Two")
(collectively, the "GSE Process Line of Credit Agreement"). The GSE Process Line
of Credit is  evidenced  by a  Promissory  Note dated  October  13,  1995 in the
original  principal amount of $7,000,000 (which replaces a Promissory Note dated
January 31,  1995 in the original principal amount of $6,000,000), as amended by
Amendment Number One and by Amendment Number Two (collectively, the "GSE Process
Line of Credit Note")

     B-2. Pursuant to the GSE Process Line of Credit Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit.  In connection  therewith,  GSE Process  entered into a Master Letter of
Credit  Agreement  dated  January  31,  1995,  in favor of the Lender  (the "GSE
Process Letter of Credit Agreement").

     B-3.  The GSE Process  Line of Credit  Agreement,  the GSE Process  Line of
Credit Note, the GSE Process Letter of Credit  Agreement and all other documents
evidencing,  securing, guaranteeing or otherwise related to the GSE Process Line
of Credit are collectively called the "GSE Process Loan Documents."

     B-4. As of December 18, 1998, exclusive of any amounts which may become due
in  connection  with the GSE Process  Letter of Credit  Agreement,  there is due
under the GSE Process Line of Credit principal of Zero and 00/100 Dollars ($-0-)
and  interest of One Thousand  One Hundred Ten and 52/100  Dollars  ($1,110.52),
plus  attorneys'  fees and other costs  which are payable  under the GSE Process
Loan Documents.

     B-5.  Pursuant to Article III of the GSE Process Line of Credit  Agreement,
and included  within the maximum amount  available to be borrowed by GSE Process
under the GSE Process Line of Credit,  there is outstanding Letter of Credit No.
405600 in the face  amount of  $630,000  issued by the Lender for the benefit of
8930 Stanford Boulevard, LLC (the "GSE Process Letter of Credit").

     C. GSE Power,  MSHI and GSE  Process  are called the  "Borrowers."  The GSE
Power Line of Credit and the GSE Process Line of Credit are called the "Lines of
Credit."  The GSE Power  Letter of Credit and the GSE  Process  Letter of Credit
(and  any  replacement  for  such  Letter  of  Credit  issued  pursuant  to  the
Modification  Agreement (as defined below)),  together with any other Letters of
Credit which may be issued by the Lender  pursuant to the terms of the Letter of
Credit  Agreements,  as amended by this Agreement,  are collectively  called the
"Letters of Credit." The GSE Power Line of Credit Note,  the GSE Process Line of
Credit  Note,  the GSE Power  Letter of Credit  Agreements  and the GSE  Process
Letter of Credit  Agreement  are  called  the "Notes."   The Notes and all other
documents evidencing,  securing,  guaranteeing or otherwise related to the Lines
of Credit or the Letters of Credit,  including any modifications,  restatements,
extensions, renewals and replacements thereof, are collectively called the "Loan
Documents," which term shall also include the Modification Agreement (as defined
below).

     D. GSE Power, MSHI, GSE Process, the Guarantor,  the Lender and others have
entered into a Modification  Agreement of even date herewith (the  "Modification
Agreement"), pursuant to which the Guarantor agreed to execute this Guaranty.

     NOW, THEREFORE, WITNESSETH, in consideration of the agreement of the Lender
to enter into the  Modification  Agreement,  the Guarantor  hereby covenants and
agrees as follows:

     The undersigned  hereby guarantees to the Lender that payment of principal,
interest,  late charges and any other sums payable under the Notes shall be made
according to the terms of the Notes without  deduction by reason of any set-off,
defense  or   counterclaim,   irrespective  of  any  invalidity   therein,   the
unenforceability thereof or the insufficiency, invalidity or unenforceability of
any  security  therefor,  and  hereby  unconditionally  consent  to  the  terms,
covenants and conditions of the Notes and the other Loan  Documents;  and hereby
consents,  without notice to the undersigned,  to the extension,  in whole or in
part from  time to time,  whether  or not for a term in  excess of the  original
term,  of the  payment of the Notes;  and agrees in case the dates of payment of
the Notes shall be extended in whole or in part,  that all moneys due thereunder
shall be paid when due according to such  extension or  extensions;  and further
consents  to the  waiving or  amendment  by the Lender of any term,  covenant or
condition  of the Notes or the other  Loan  Documents  or of any  indulgence  or
release granted  thereunder;  and further consents to any changes or alterations
which may be made in any term, covenant or condition of the Loan Documents;  and
agrees that no change, alteration, modification, renewal, or extension of any of
the Loan  Documents  shall  alter  or  affect  the  liability  of the  Guarantor
hereunder;  and further consents to the release of any collateral the Lender may
have  under  the  Loan  Documents  or to the  subordination  of the  Loan or the
collateral  securing the Loan to any other debt or security  interest under such
terms  and  conditions  as the  Lender  may  agree to in its  sole and  absolute
discretion;  and further hereby waives  presentment,  demand of payment from the
maker, protest and notice of nonpayment.

     If the  Borrowers  shall fail to make any  payment of any sum due under the
Notes, or if the Borrowers  shall default in any term,  covenant or condition of
the Loan Documents,  then the undersigned hereby  unconditionally  guarantees to
the Lender that the  undersigned  shall (without  first  requiring the Lender to
proceed against the Borrowers,  or any other security) (1) pay to the Lender the
entire unpaid  balance with interest and costs,  and (2) cure any default in any
term,  covenant or  condition of the Loan  Documents.  The  undersigned  further
agrees to  indemnify  and hold  harmless,  the Lender  from any loss  (including
actual  attorneys'  fees)  resulting  from any  default  made at any time by the
Borrowers  in any terms of the Loan  Documents or by the  undersigned  under the
terms of this Guaranty.

     The undersigned  hereby waives notice of acceptance of this Guaranty by the
Lender and any and all notices and demands of every kind and  description  which
may be required  to be given by any  statute or rule of law,  and agree that the
liability of the undersigned  hereunder shall in no way be affected,  diminished
or released by any forbearance  which may be granted to the Borrowers (or to any
successor  to it or to any  person  or  entity  which  shall  have  assumed  the
obligations  of the  Borrowers  under the  Notes) or by any  waiver of any term,
covenant or  condition  in the Loan  Documents by the Lender or by reason of any
change or  modification  in any of the Loan  Documents,  or by the acceptance of
additional  security  or the  release  by the Lender of any  security  or of any
person or entity primarily or secondarily liable.

     The  Guarantor  agrees  that this  Guaranty  may be  enforced by the Lender
without  the  necessity  at any time of  resorting  to or  exhausting  any other
security or collateral and without the necessity at any time of having  recourse
to the Notes or  enforcing  any rights it may have  against any other  person or
entity.  The  undersigned  further  agrees that nothing herein  contained  shall
prevent  the Lender from suing on the Notes or from  exercising  any other right
available  to it under the Notes or any of the other Loan  Documents  or against
any other person or entity, and the exercise of any of the aforementioned rights
shall not constitute a legal or equitable discharge of the undersigned, it being
the purpose and intent of the undersigned that his/her or its obligations  under
this  Guaranty   shall  be  absolute  and   unconditional   under  any  and  all
circumstances  and s/he or it shall be released  therefrom  only upon payment of
all sums due hereunder and under the Notes and the other Loan Documents.

     This Guaranty shall continue to be effective or be reinstated,  as the case
may be, if at any time any payment is rescinded or must otherwise be returned by
the Lender upon the insolvency, bankruptcy or reorganization of the Borrowers or
otherwise, all as though such payment had not been made.

     Any  indebtedness  of the  Borrowers  to the  Guarantor,  now or  hereafter
existing,  is hereby  subordinated  to the  indebtedness of the Borrowers to the
Lender.  The Guarantor agrees that, after a default (including the expiration of
any applicable cure period) in any term, covenant,  or condition of the Notes or
the other Loan  Documents  and until the  indebtedness  of the  Borrowers to the
Lender has been paid in full, the Guarantor will not seek, accept, or retain for
the Guarantor's  own account,  any payment from the Borrowers on account of such
subordinated  debt.  Following  a  default  (including  the  expiration  of  any
applicable cure period) in any term, covenant,  or condition of the Notes or the
other  Loan  Documents,  any  payments  to the  Guarantor  on  account  of  such
subordinated  debt shall be collected and received by the Guarantor in trust for
the Lender  and shall be paid over to the Lender on account of the  indebtedness
of the Borrowers to the Lender without impairing or releasing the obligations of
the Guarantor  hereunder.  Until ninety-five (95) days after the indebtedness of
the  Borrowers  to the  Lender  has been  paid in  full,  the  Guarantor  hereby
unconditionally  and  irrevocably  agrees that (1) the Guarantor will not at any
time assert  against the  Borrowers (or the  Borrowers'  estate in the event the
Borrowers  becomes  bankrupt or becomes  the  subject of any case or  proceeding
under the bankruptcy laws of the United States of America) any right or claim to
indemnification,  reimbursement, contribution, or payment for or with respect to
any and all amounts the  Guarantor  may pay or be  obligated  to pay the Lender,
including,  without limitation, the indebtedness of the Borrowers to the Lender,
and any and all  obligations  which  the  Guarantor  may  perform,  satisfy,  or
discharge,  under or with respect to this Guaranty and (2) the Guarantor  waives
and  releases  all such  rights  and claims to  indemnification,  reimbursement,
contribution, or payment which the Guarantor may have now or at any time against
the  Borrowers  (or the  Borrowers'  estate in the event the  Borrowers  becomes
bankrupt or becomes the subject of any case or proceeding  under the  bankruptcy
laws of the United States of America).

     The undersigned  hereby  authorizes any clerk of any court of record or any
attorney  to  enter in any  court  of  competent  jurisdiction  in the  State of
Maryland  or any other  State or  Territory  of the United  States  judgment  by
confession  against  the  undersigned  in favor  of the  Lender  for the  entire
principal  amount of the Notes then  remaining  unpaid  with  interest  thereon,
together with attorneys' fees of fifteen percent (15%) and court costs,  without
stay of  execution  or right of appeal  expressly  waiving  the  benefit  of all
exemption  laws and all  irregularity  or error in entering said judgment or the
execution thereon. No single exercise of the foregoing power to confess judgment
shall be deemed to exhaust the power,  whether or not any such exercise shall be
held by any court to be invalid,  voidable or void, but the power shall continue
undiminished,  and it may be exercised  from time to time as often as the Lender
shall elect,  until such time as the Lender shall have received  payment in full
of all  indebtedness  of the  Borrowers  to the Lender  together  with costs and
indebtedness  of  the  undersigned  under  this  Guaranty.  Notwithstanding  the
Lender's  right to  obtain  a  confessed  judgment  which  includes  an award of
attorneys'  fees of 15% of the unpaid  principal  sum, the Lender agrees that at
such time as all  indebtedness  under the Notes is fully paid,  the Lender shall
only be entitled to recover its actual  attorneys fees and expenses incurred in
connection with the Notes.

     The  undersigned  hereby  waives all right to trial by jury of all  claims,
defenses,  counterclaims  and suits of any kind arising from or relating to this
Guaranty.  The  undersigned  acknowledges  that  s/he or it  makes  this  waiver
voluntarily  and  knowingly  after  consultation  with counsel of his/her or its
choice. The undersigned agrees that all such claims, defenses, counterclaims and
suits shall be tried before a judge of competent jurisdiction, without a jury.

     All  laws  exempting  real  or  personal   property  from  execution,   and
inquisition and extension upon any levy on real or personal  property are hereby
waived and  condemnation  agreed to, and no benefit of exemption will be claimed
under or by virtue of any exemption  law now in force or which  hereafter may be
passed.

     The undersigned hereby waives promptness,  diligence,  notice of acceptance
and any other notice with respect to any of the terms,  covenants or  conditions
of this Guaranty or any of the other Loan Documents and any requirement that the
Lender protect,  secure,  perfect or insure any security interest or lien or any
property  subject  thereto or exhaust  any right or take any action  against the
Borrowers or any other person or entity or any collateral.

     Notwithstanding  anything  to the  contrary  herein,  the Lender  agrees to
notify the undersigned upon the occurrence of an Event of Default (as defined in
the Modification Agreement).

     The undersigned hereby requests the Lender, if it wishes to send any notice
to the undersigned,  although all notices and demands have been waived except as
set forth in the  immediately  preceding  paragraph,  to send such notice to the
undersigned  at 9189 Red  Branch  Road,  Columbia,  Maryland  21045,  Attention:
Stephen J. Fogarty.

     The  undersigned  hereby  acknowledges,  consents  and  agrees (1) that the
provisions of this Guaranty and the rights of all parties mentioned herein shall
be governed by the laws of the State of Maryland and  interpreted  and construed
in accordance with such laws (excluding  Maryland conflict of laws) and (2) that
the United States  District  Court for the District of Maryland and any court of
competent  jurisdiction of the State of Maryland shall have  jurisdiction in any
proceeding instituted to enforce this Guaranty,  and any objections to venue are
hereby waived.

     A default  (including the expiration of any applicable  cure period) in any
term,  covenant,  or  condition of the Notes or the other Loan  Documents  shall
constitute and be deemed a default under this Guaranty.

     Upon a  default  under  this  Guaranty,  including  the  expiration  of any
applicable  grace or cure  periods,  the Lender  may,  at its option and without
notice or demand,  declare an amount equal to the  remainder  of the  Borrowers'
obligations  under the Loan Documents to be  immediately  due and payable by the
Guarantor,  whether or not the same are due and payable by the Borrowers at that
time.  The books  and  records  of the  Lender  showing  the  amount  due by the
Borrowers  shall be binding upon the Guarantor  for the purpose of  establishing
such items and shall be prima facie proof thereof.  The Guarantor  agrees to pay
the Lender's  actual  attorneys' fees and all other costs and expenses which may
be incurred by the Lender in the  enforcement of this  Guaranty,  whether or not
suit is filed.

     The rights, powers,  privileges and discretions (the "rights") to which the
Lender may be entitled  hereunder  shall inure to the benefit of its  successors
and assigns. All the rights of the Lender are cumulative and not alternative and
may be enforced successively or concurrently.  Failure of the Lender to exercise
any of its rights  shall not be deemed a waiver  thereof and no waiver of any of
its  rights  shall be  deemed  to  apply to any  other  rights  nor  shall it be
effective unless in writing and signed by the Lender.  The terms,  covenants and
conditions  of or imposed  upon the  undersigned  herein  shall be binding  upon
his/her or its personal representatives, successors and assigns.

     In case any  provision  (or any part of any  provision)  contained  in this
Guaranty shall for any reason be held to be invalid, illegal or unenforceable in
any respect,  such invalidity,  illegality or unenforceability  shall not affect
any other  provision  (or  remaining  part of the  affected  provision)  of this
Guaranty but this  Guaranty  shall be construed as if such  invalid,  illegal or
unenforceable  provision (or part thereof) had never been  contained  herein but
only to the extent it is invalid, illegal or unenforceable.

     This Guaranty  replaces and  supercedes  all prior  guaranties  made by the
undersigned.

     Time is of the essence.

     IN WITNESS  WHEREOF,  the undersigned has executed this Guaranty under seal
effective as of the date first above written.

WITNESS/ATTEST:                             GSE SYSTEMS, INC.


                                            By:/S/   STEPHEN J. FOGARTY   (SEAL)
- -----------------------------------            --------------------------------

                                               Name: Stephen J. Fogarty
                                                    ---------------------------
                                            
                                              Title: Senior Vice President
                                                    ---------------------------
                                                              


STATE OF ______________________                     
                                            SS:
CITY/COUNTY OF _______________             

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of GSE  Systems,
Inc., and that (s)he, in such capacity,  being authorized to do so, executed the
foregoing instrument for the purposes therein contained,  by signing the name of
GSE Systems, Inc., as ____________________ of GSE Systems, Inc.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.

                                            
                                               --------------------------------
                                              Notary Public
My Commission expires:



                                                                   Exhibit 10.20

                             UNCONDITIONAL GUARANTY

     THIS  UNCONDITIONAL  GUARANTY (this "Guaranty") is made as of the _____ day
of January,  1999 by GP  STRATEGIES  CORPORATION,  a Delaware  corporation  (the
"Guarantor"),  in favor of FIRST UNION NATIONAL BANK (the  "Lender,"  which term
shall include any subsequent holder of the Notes (as defined below)).

                                                     Recitals

     A. $7,000,000 GSE Power Line of Credit

     A-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000 (the "GSE Power Line of Credit") to GSE Power Systems, Inc. (f/k/a
Simulation,  Systems & Services  Technologies  Company),  a Delaware corporation
("GSE  Power") and MSHI,  INC., a Virginia  corporation  ("MSHI")  pursuant to a
Letter of Credit, Loan and Security Agreement dated January 30, 1996, as amended
from time to time (the "GSE Power Line of Credit Agreement"). The GSE Power Line
of Credit is  evidenced  by a  Promissory  Note dated  January  30,  1996 in the
original principal amount of $7,000,000,  as amended from time to time (the "GSE
Power Line of Credit Note").

     A-2.  Pursuant to the GSE Power Line of Credit  Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit. In connection therewith, GSE Power and MSHI entered into separate Master
Letter of Credit  Agreements dated January 30, 1996, in favor of the Lender (the
"GSE Power Letter of Credit Agreements").

     A-3. The GSE Power Line of Credit  Agreement,  the GSE Power Line of Credit
Note,  the GSE  Power  Letter  of  Credit  Agreements  and all  other  documents
evidencing, securing, guaranteeing or otherwise related to the GSE Power Line of
Credit are collectively called the "GSE Power Loan Documents".

     A-4. As of December 18, 1998, exclusive of any amounts which may become due
in connection with the GSE Power Letter of Credit Agreements, there is due under
the GSE Power Line of Credit  principal of Five Million Eight  Hundred  Thousand
Nine Hundred and 00/100  Dollars  ($5,800,900.00)  and interest of  Twenty-Three
Thousand Six Hundred Fifty-Five and 00/100 Dollars ($23,655.00), plus attorneys'
fees and other costs which are payable under the GSE Power Loan Documents.

     A-5. Pursuant to Article III of the GSE Power Line of Credit Agreement, and
included  within the maximum  amount  available  to be borrowed by GSE Power and
MSHI under the GSE Power Line of Credit,  there is outstanding  Letter of Credit
No. SM406588 in the face amount of $180,243 issued by the Lender for the benefit
of Central  Trust of China  Procurement  Department  (the "GSE  Power  Letter of
Credit").

     B. $3,000,000 GSE Process Line of Credit

     B-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000  (subsequently  reduced to  $3,000,000)  (the "GSE Process Line of
Credit") to GSE Process Solutions, Inc., a Delaware corporation ("GSE Process"),
pursuant to a Letter of Credit,  Loan and Security  Agreement  dated January 31,
1995, as amended and restated by an Amended and Restated Letter of Credit,  Loan
and Security Agreement dated October 13, 1995, as amended by an Amendment Number
One to Amended and Restated  Letter of Credit,  Loan and Security  Agreement and
Promissory  Note dated  February  23, 1996  ("Amendment  Number  One") and by an
Amendment Number Two to Amended and Restated Letter of Credit, Loan and Security
Agreement and Promissory Note dated November 11, 1997  ("Amendment  Number Two")
(collectively, the "GSE Process Line of Credit Agreement"). The GSE Process Line
of Credit is  evidenced  by a  Promissory  Note dated  October  13,  1995 in the
original  principal amount of $7,000,000 (which replaces a Promissory Note dated
January 31,  1995 in the original principal amount of $6,000,000), as amended by
Amendment Number One and by Amendment Number Two (collectively, the "GSE Process
Line of Credit Note")

     B-2. Pursuant to the GSE Process Line of Credit Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit.  In connection  therewith,  GSE Process  entered into a Master Letter of
Credit  Agreement  dated  January  31,  1995,  in favor of the Lender  (the "GSE
Process Letter of Credit Agreement").

     B-3.  The GSE Process  Line of Credit  Agreement,  the GSE Process  Line of
Credit Note, the GSE Process Letter of Credit  Agreement and all other documents
evidencing,  securing, guaranteeing or otherwise related to the GSE Process Line
of Credit are collectively called the "GSE Process Loan Documents."

     B-4. As of December 18, 1998, exclusive of any amounts which may become due
in  connection  with the GSE Process  Letter of Credit  Agreement,  there is due
under the GSE Process Line of Credit principal of Zero and 00/100 Dollars ($-0-)
and  interest of One Thousand  One Hundred Ten and 52/100  Dollars  ($1,110.52),
plus  attorneys'  fees and other costs  which are payable  under the GSE Process
Loan Documents.

     B-5.  Pursuant to Article III of the GSE Process Line of Credit  Agreement,
and included  within the maximum amount  available to be borrowed by GSE Process
under the GSE Process Line of Credit,  there is outstanding Letter of Credit No.
405600 in the face  amount of  $630,000  issued by the Lender for the benefit of
8930 Stanford Boulevard, LLC (the "GSE Process Letter of Credit").

     C. GSE Power,  MSHI and GSE  Process  are called the  "Borrowers."  The GSE
Power Line of Credit and the GSE Process Line of Credit are called the "Lines of
Credit."  The GSE Power  Letter of Credit and the GSE  Process  Letter of Credit
(and  any  replacement  for  such  Letter  of  Credit  issued  pursuant  to  the
Modification  Agreement (as defined below)),  together with any other Letters of
Credit which may be issued by the Lender  pursuant to the terms of the Letter of
Credit  Agreements,  as amended by this Agreement,  are collectively  called the
"Letters of Credit." The GSE Power Line of Credit Note,  the GSE Process Line of
Credit  Note,  the GSE Power  Letter of Credit  Agreements  and the GSE  Process
Letter of Credit  Agreement  are  called  the  "Notes."  The Notes and all other
documents evidencing,  securing,  guaranteeing or otherwise related to the Lines
of Credit or the Letters of Credit,  including any modifications,  restatements,
extensions, renewals and replacements thereof, are collectively called the "Loan
Documents," which term shall also include the Modification Agreement (as defined
below).

     D. GSE Power, MSHI, GSE Process, the Guarantor,  the Lender and others have
entered into a Modification  Agreement of even date herewith (the  "Modification
Agreement"), pursuant to which the Guarantor agreed to execute this Guaranty.

     NOW, THEREFORE, WITNESSETH, in consideration of the agreement of the Lender
to enter into the  Modification  Agreement,  the Guarantor  hereby covenants and
agrees as follows:

     The undersigned  hereby guarantees to the Lender that payment of principal,
interest,  late charges and any other sums payable under the Notes shall be made
according to the terms of the Notes without  deduction by reason of any set-off,
defense  or   counterclaim,   irrespective  of  any  invalidity   therein,   the
unenforceability thereof or the insufficiency, invalidity or unenforceability of
any  security  therefor,  and  hereby  unconditionally  consent  to  the  terms,
covenants and conditions of the Notes and the other Loan  Documents;  and hereby
consents,  without notice to the undersigned,  to the extension,  in whole or in
part from  time to time,  whether  or not for a term in  excess of the  original
term,  of the  payment of the Notes;  and agrees in case the dates of payment of
the Notes shall be extended in whole or in part,  that all moneys due thereunder
shall be paid when due according to such  extension or  extensions;  and further
consents  to the  waiving or  amendment  by the Lender of any term,  covenant or
condition  of the Notes or the other  Loan  Documents  or of any  indulgence  or
release granted  thereunder;  and further consents to any changes or alterations
which may be made in any term, covenant or condition of the Loan Documents;  and
agrees that no change, alteration, modification, renewal, or extension of any of
the Loan  Documents  shall  alter  or  affect  the  liability  of the  Guarantor
hereunder;  and further consents to the release of any collateral the Lender may
have  under  the  Loan  Documents  or to the  subordination  of the  Loan or the
collateral  securing the Loan to any other debt or security  interest under such
terms  and  conditions  as the  Lender  may  agree to in its  sole and  absolute
discretion;  and further hereby waives  presentment,  demand of payment from the
maker, protest and notice of nonpayment.

     If the  Borrowers  shall fail to make any  payment of any sum due under the
Notes, or if the Borrowers  shall default in any term,  covenant or condition of
the Loan Documents,  then the undersigned hereby  unconditionally  guarantees to
the Lender that the  undersigned  shall (without  first  requiring the Lender to
proceed against the Borrowers,  or any other security) (1) pay to the Lender the
entire unpaid  balance with interest and costs,  and (2) cure any default in any
term,  covenant or  condition of the Loan  Documents.  The  undersigned  further
agrees to  indemnify  and hold  harmless,  the Lender  from any loss  (including
actual  attorneys'  fees)  resulting  from any  default  made at any time by the
Borrowers  in any terms of the Loan  Documents or by the  undersigned  under the
terms of this Guaranty.

     The undersigned  hereby waives notice of acceptance of this Guaranty by the
Lender and any and all notices and demands of every kind and  description  which
may be required  to be given by any  statute or rule of law,  and agree that the
liability of the undersigned  hereunder shall in no way be affected,  diminished
or released by any forbearance  which may be granted to the Borrowers (or to any
successor  to it or to any  person  or  entity  which  shall  have  assumed  the
obligations  of the  Borrowers  under the  Notes) or by any  waiver of any term,
covenant or  condition  in the Loan  Documents by the Lender or by reason of any
change or  modification  in any of the Loan  Documents,  or by the acceptance of
additional  security  or the  release  by the Lender of any  security  or of any
person or entity primarily or secondarily liable.

     The  Guarantor  agrees  that this  Guaranty  may be  enforced by the Lender
without  the  necessity  at any time of  resorting  to or  exhausting  any other
security or collateral and without the necessity at any time of having  recourse
to the Notes or  enforcing  any rights it may have  against any other  person or
entity.  The  undersigned  further  agrees that nothing herein  contained  shall
prevent  the Lender from suing on the Notes or from  exercising  any other right
available  to it under the Notes or any of the other Loan  Documents  or against
any other person or entity, and the exercise of any of the aforementioned rights
shall not constitute a legal or equitable discharge of the undersigned, it being
the purpose and intent of the undersigned that his/her or its obligations  under
this  Guaranty   shall  be  absolute  and   unconditional   under  any  and  all
circumstances  and s/he or it shall be released  therefrom  only upon payment of
all sums due hereunder and under the Notes and the other Loan Documents.

     This Guaranty shall continue to be effective or be reinstated,  as the case
may be, if at any time any payment is rescinded or must otherwise be returned by
the Lender upon the insolvency, bankruptcy or reorganization of the Borrowers or
otherwise, all as though such payment had not been made.

     Any  indebtedness  of the  Borrowers  to the  Guarantor,  now or  hereafter
existing,  is hereby  subordinated  to the  indebtedness of the Borrowers to the
Lender.  The Guarantor agrees that, after a default (including the expiration of
any applicable cure period) in any term, covenant,  or condition of the Notes or
the other Loan  Documents  and until the  indebtedness  of the  Borrowers to the
Lender has been paid in full, the Guarantor will not seek, accept, or retain for
the Guarantor's  own account,  any payment from the Borrowers on account of such
subordinated  debt.  Following  a  default  (including  the  expiration  of  any
applicable cure period) in any term, covenant,  or condition of the Notes or the
other  Loan  Documents,  any  payments  to the  Guarantor  on  account  of  such
subordinated  debt shall be collected and received by the Guarantor in trust for
the Lender  and shall be paid over to the Lender on account of the  indebtedness
of the Borrowers to the Lender without impairing or releasing the obligations of
the Guarantor  hereunder.  Until ninety-five (95) days after the indebtedness of
the  Borrowers  to the  Lender  has been  paid in  full,  the  Guarantor  hereby
unconditionally  and  irrevocably  agrees that (1) the Guarantor will not at any
time assert  against the  Borrowers (or the  Borrowers'  estate in the event the
Borrowers  becomes  bankrupt or becomes  the  subject of any case or  proceeding
under the bankruptcy laws of the United States of America) any right or claim to
indemnification,  reimbursement, contribution, or payment for or with respect to
any and all amounts the  Guarantor  may pay or be  obligated  to pay the Lender,
including,  without limitation, the indebtedness of the Borrowers to the Lender,
and any and all  obligations  which  the  Guarantor  may  perform,  satisfy,  or
discharge,  under or with respect to this Guaranty and (2) the Guarantor  waives
and  releases  all such  rights  and claims to  indemnification,  reimbursement,
contribution, or payment which the Guarantor may have now or at any time against
the  Borrowers  (or the  Borrowers'  estate in the event the  Borrowers  becomes
bankrupt or becomes the subject of any case or proceeding  under the  bankruptcy
laws of the United States of America).

     The undersigned  hereby  authorizes any clerk of any court of record or any
attorney  to  enter in any  court  of  competent  jurisdiction  in the  State of
Maryland  or any other  State or  Territory  of the United  States  judgment  by
confession  against  the  undersigned  in favor  of the  Lender  for the  entire
principal  amount of the Notes then  remaining  unpaid  with  interest  thereon,
together with attorneys' fees of fifteen percent (15%) and court costs,  without
stay of  execution  or right of appeal  expressly  waiving  the  benefit  of all
exemption  laws and all  irregularity  or error in entering said judgment or the
execution thereon. No single exercise of the foregoing power to confess judgment
shall be deemed to exhaust the power,  whether or not any such exercise shall be
held by any court to be invalid,  voidable or void, but the power shall continue
undiminished,  and it may be exercised  from time to time as often as the Lender
shall elect,  until such time as the Lender shall have received  payment in full
of all  indebtedness  of the  Borrowers  to the Lender  together  with costs and
indebtedness  of  the  undersigned  under  this  Guaranty.  Notwithstanding  the
Lender's  right to  obtain  a  confessed  judgment  which  includes  an award of
attorneys'  fees of 15% of the unpaid  principal  sum, the Lender agrees that at
such time as all  indebtedness  under the Notes is fully paid,  the Lender shall
only be entitled to recover its actual  attorneys' fees and expenses incurred in
connection with the Notes.

     The  undersigned  hereby  waives all right to trial by jury of all  claims,
defenses,  counterclaims  and suits of any kind arising from or relating to this
Guaranty.  The  undersigned  acknowledges  that  s/he or it  makes  this  waiver
voluntarily  and  knowingly  after  consultation  with counsel of his/her or its
choice. The undersigned agrees that all such claims, defenses, counterclaims and
suits shall be tried before a judge of competent jurisdiction, without a jury.

     All  laws  exempting  real  or  personal   property  from  execution,   and
inquisition and extension upon any levy on real or personal  property are hereby
waived and  condemnation  agreed to, and no benefit of exemption will be claimed
under or by virtue of any exemption  law now in force or which  hereafter may be
passed.

     The undersigned hereby waives promptness,  diligence,  notice of acceptance
and any other notice with respect to any of the terms,  covenants or  conditions
of this Guaranty or any of the other Loan Documents and any requirement that the
Lender protect,  secure,  perfect or insure any security interest or lien or any
property  subject  thereto or exhaust  any right or take any action  against the
Borrowers or any other person or entity or any collateral.

     Notwithstanding  anything  to the  contrary  herein,  the Lender  agrees to
notify the undersigned upon the occurrence of an Event of Default (as defined in
the Modification Agreement).

     The undersigned hereby requests the Lender, if it wishes to send any notice
to the undersigned,  although all notices and demands have been waived except as
set forth in the  immediately  preceding  paragraph,  to send such notice to the
undersigned at 9 West 57th Street,  Suite 4170,  New York, New York,  Attention:
Andrea D. Kantor, Esquire.

     The  undersigned  hereby  acknowledges,  consents  and  agrees (1) that the
provisions of this Guaranty and the rights of all parties mentioned herein shall
be governed by the laws of the State of Maryland and  interpreted  and construed
in accordance with such laws (excluding  Maryland conflict of laws) and (2) that
the United States  District  Court for the District of Maryland and any court of
competent  jurisdiction of the State of Maryland shall have  jurisdiction in any
proceeding instituted to enforce this Guaranty,  and any objections to venue are
hereby waived.

     A default  (including the expiration of any applicable  cure period) in any
term,  covenant,  or  condition of the Notes or the other Loan  Documents  shall
constitute and be deemed a default under this Guaranty.

     Upon a  default  under  this  Guaranty,  including  the  expiration  of any
applicable  grace or cure  periods,  the Lender  may,  at its option and without
notice or demand,  declare an amount equal to the  remainder  of the  Borrowers'
obligations  under the Loan Documents to be  immediately  due and payable by the
Guarantor,  whether or not the same are due and payable by the Borrowers at that
time.  The books  and  records  of the  Lender  showing  the  amount  due by the
Borrowers  shall be binding upon the Guarantor  for the purpose of  establishing
such items and shall be prima facie proof thereof.  The Guarantor  agrees to pay
the Lender's  actual  attorneys' fees and all other costs and expenses which may
be incurred by the Lender in the  enforcement of this  Guaranty,  whether or not
suit is filed.

     The rights, powers,  privileges and discretions (the "rights") to which the
Lender may be entitled  hereunder  shall inure to the benefit of its  successors
and assigns. All the rights of the Lender are cumulative and not alternative and
may be enforced successively or concurrently.  Failure of the Lender to exercise
any of its rights  shall not be deemed a waiver  thereof and no waiver of any of
its  rights  shall be  deemed  to  apply to any  other  rights  nor  shall it be
effective unless in writing and signed by the Lender.  The terms,  covenants and
conditions  of or imposed  upon the  undersigned  herein  shall be binding  upon
his/her or its personal representatives, successors and assigns.

     In case any  provision  (or any part of any  provision)  contained  in this
Guaranty shall for any reason be held to be invalid, illegal or unenforceable in
any respect,  such invalidity,  illegality or unenforceability  shall not affect
any other  provision  (or  remaining  part of the  affected  provision)  of this
Guaranty but this  Guaranty  shall be construed as if such  invalid,  illegal or
unenforceable  provision (or part thereof) had never been  contained  herein but
only to the extent it is invalid, illegal or unenforceable.

     Notwithstanding   anything   to  the   contrary   contained   herein,   the
undersigned's  liability  under this  Guaranty  shall be  limited to  $1,500,000
(subject to increase as set forth in the  immediately  succeeding  paragraph) of
the principal and interest due under the Notes  (including any amounts which may
be or become due upon a draw under any Letters of Credit),  which  amount  shall
not be reduced by any payments from the  Borrowers,  any other  guarantor or any
other source unless and until the  outstanding  principal and interest due under
the Notes is less than $1,500,000 (or $1,500,000  plus the Increased  Amount (as
defined in the immediately  succeeding paragraph as applicable).  There shall be
no limit on the undersigned's  liability for costs of collection incurred by the
Lender to enforce  this  Guaranty.  The  undersigned  agrees to pay the Lender's
actual  attorneys' fees and all other costs and expenses that may be incurred by
the Lender in the  enforcement of this  Guaranty,  whether or not suit is filed.
This  limitation  on  liability  is not  intended  and  shall  not in any way be
construed  to require the Lender to pursue its remedies  against the  Borrowers,
any other guarantor or any collateral before exercising its remedies against the
undersigned.  Notwithstanding the foregoing, the Lender agrees that at such time
as the  undersigned  has paid to the Lender such  $1,500,000 (or $1,500,000 plus
the Increased  Amount (as defined in the  immediately  succeeding  paragraph) as
applicable) plus all actual  attorneys' fees and all other costs and expenses of
collection  incurred  by the  Lender as of the date the  undersigned  makes such
payment to the Lender,  the undersigned  shall have no further liability for any
remaining  indebtedness  due under the Notes or any attorneys' fees or costs and
expenses  incurred  by the  Lender  after the date the  undersigned  makes  such
payment to the Lender,  provided that such  agreement  shall be null and void if
the  Lender  is  required  by a court of  competent  jurisdiction  under a final
non-appealable  order  to  return  all or any  portion  of such  payment  to the
undersigned,  a trustee in bankruptcy, a receiver or any other third party, as a
preference,  fraudulent  conveyance or for any other reason under any applicable
federal or state law.

     Notwithstanding  the  foregoing,  the  liability of the  undersigned  shall
increase from  $1,500,000  to  $1,500,000  plus an amount equal to fifty percent
(50%) of any amounts  drawn by the  beneficiary  of Letter of Credit No.  405600
and/or  any  replacement  for such  Letter  of  Credit  issued  pursuant  to the
Modification  Agreement on or prior to their  respective  expiration  dates (the
"Increased  Amount").   Such  increases  shall  be  effective   immediately  and
automatically upon any such draw(s).

     This Guaranty  replaces and  supercedes  all prior  guaranties  made by the
undersigned.

     Time is of the essence.


     IN WITNESS  WHEREOF,  the undersigned has executed this Guaranty under seal
effective as of the date first above written.

WITNESS/ATTEST:                           GP STRATEGIES CORPORATION
                                        

                                          By:/S/   SCOTT GREENBERG       (SEAL)
                                             ----------------------------------

                                             Name: Scott Greenberg
                                                  -----------------------------
                                         
                                            Title: Executive Vice President
                                                  -----------------------------


STATE OF ______________________              
                                          SS:
CITY/COUNTY OF _______________           

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged  himself/herself  to be the  ____________________  of GP Strategies
Corporation,  and that  (s)he,  in such  capacity,  being  authorized  to do so,
executed the foregoing instrument for the purposes therein contained, by signing
the name of GP Strategies Corporation,  as ____________________ of GP Strategies
Corporation.

         IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                   
                                          -------------------------------------
                                          Notary Public
My Commission expires:

                                                                   Exhibit 10.21


                             UNCONDITIONAL GUARANTY


     THIS  UNCONDITIONAL  GUARANTY (this "Guaranty") is made as of the _____ day
of January, 1999_ by MANTECH INTERNATIONAL CORPORATION, a New Jersey corporation
(the  "Guarantor"),  in favor of FIRST UNION NATIONAL BANK (the "Lender,"  which
term shall include any subsequent holder of the Notes (as defined below)).

                                    Recitals

     A. $7,000,000 GSE Power Line of Credit

     A-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000 (the "GSE Power Line of Credit") to GSE Power Systems, Inc. (f/k/a
Simulation,  Systems & Services  Technologies  Company),  a Delaware corporation
("GSE  Power") and MSHI,  INC., a Virginia  corporation  ("MSHI")  pursuant to a
Letter of Credit, Loan and Security Agreement dated January 30, 1996, as amended
from time to time (the "GSE Power Line of Credit Agreement"). The GSE Power Line
of Credit is  evidenced  by a  Promissory  Note dated  January  30,  1996 in the
original principal amount of $7,000,000,  as amended from time to time (the "GSE
Power Line of Credit Note").

     A-2.  Pursuant to the GSE Power Line of Credit  Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit. In connection therewith, GSE Power and MSHI entered into separate Master
Letter of Credit  Agreements dated January 30, 1996, in favor of the Lender (the
"GSE Power Letter of Credit Agreements").

     A-3. The GSE Power Line of Credit  Agreement,  the GSE Power Line of Credit
Note,  the GSE  Power  Letter  of  Credit  Agreements  and all  other  documents
evidencing, securing, guaranteeing or otherwise related to the GSE Power Line of
Credit are collectively called the "GSE Power Loan Documents".

     A-4. As of December 18, 1998, exclusive of any amounts which may become due
in connection with the GSE Power Letter of Credit Agreements, there is due under
the GSE Power Line of Credit  principal of Five Million Eight  Hundred  Thousand
Nine Hundred and 00/100  Dollars  ($5,800,900.00)  and interest of  Twenty-Three
Thousand Six Hundred Fifty-Five and 00/100 Dollars ($23,655.00), plus attorneys'
fees and other costs which are payable under the GSE Power Loan Documents.

     A-5. Pursuant to Article III of the GSE Power Line of Credit Agreement, and
included  within the maximum  amount  available  to be borrowed by GSE Power and
MSHI under the GSE Power Line of Credit,  there is outstanding  Letter of Credit
No. SM406588 in the face amount of $180,243 issued by the Lender for the benefit
of Central  Trust of China  Procurement  Department  (the "GSE  Power  Letter of
Credit").

     B. $3,000,000 GSE Process Line of Credit

     B-1. The Lender extended a line of credit in the original  principal amount
of $7,000,000  (subsequently  reduced to  $3,000,000)  (the "GSE Process Line of
Credit") to GSE Process Solutions, Inc., a Delaware corporation ("GSE Process"),
pursuant to a Letter of Credit,  Loan and Security  Agreement  dated January 31,
1995, as amended and restated by an Amended and Restated Letter of Credit,  Loan
and Security Agreement dated October 13, 1995, as amended by an Amendment Number
One to Amended and Restated  Letter of Credit,  Loan and Security  Agreement and
Promissory  Note dated  February  23, 1996  ("Amendment  Number  One") and by an
Amendment Number Two to Amended and Restated Letter of Credit, Loan and Security
Agreement and Promissory Note dated November 11, 1997  ("Amendment  Number Two")
(collectively, the "GSE Process Line of Credit Agreement"). The GSE Process Line
of Credit is  evidenced  by a  Promissory  Note dated  October  13,  1995 in the
original  principal amount of $7,000,000 (which replaces a Promissory Note dated
January 31,  1995 in the original principal amount of $6,000,000), as amended by
Amendment Number One and by Amendment Number Two (collectively, the "GSE Process
Line of Credit Note")

     B-2. Pursuant to the GSE Process Line of Credit Agreement,  the Lender also
agreed to issue from time to time, subject to the provisions thereof, letters of
credit.  In connection  therewith,  GSE Process  entered into a Master Letter of
Credit  Agreement  dated  January  31,  1995,  in favor of the Lender  (the "GSE
Process Letter of Credit Agreement").

     B-3.  The GSE Process  Line of Credit  Agreement,  the GSE Process  Line of
Credit Note, the GSE Process Letter of Credit  Agreement and all other documents
evidencing,  securing, guaranteeing or otherwise related to the GSE Process Line
of Credit are collectively called the "GSE Process Loan Documents."

     B-4. As of December 18, 1998, exclusive of any amounts which may become due
in  connection  with the GSE Process  Letter of Credit  Agreement,  there is due
under the GSE Process Line of Credit principal of Zero and 00/100 Dollars ($-0-)
and  interest of One Thousand  One Hundred Ten and 52/100  Dollars  ($1,110.52),
plus  attorneys'  fees and other costs  which are payable  under the GSE Process
Loan Documents.

     B-5.  Pursuant to Article III of the GSE Process Line of Credit  Agreement,
and included  within the maximum amount  available to be borrowed by GSE Process
under the GSE Process Line of Credit,  there is outstanding Letter of Credit No.
405600 in the face  amount of  $630,000  issued by the Lender for the benefit of
8930 Stanford Boulevard, LLC (the "GSE Process Letter of Credit").

     C. GSE Power,  MSHI and GSE  Process  are called the  "Borrowers."  The GSE
Power Line of Credit and the GSE Process Line of Credit are called the "Lines of
Credit."  The GSE Power  Letter of Credit and the GSE  Process  Letter of Credit
(and  any  replacement  for  such  Letter  of  Credit  issued  pursuant  to  the
Modification  Agreement (as defined below)),  together with any other Letters of
Credit which may be issued by the Lender  pursuant to the terms of the Letter of
Credit  Agreements,  as amended by this Agreement,  are collectively  called the
"Letters of Credit." The GSE Power Line of Credit Note,  the GSE Process Line of
Credit  Note,  the GSE Power  Letter of Credit  Agreements  and the GSE  Process
Letter of Credit  Agreement  are  called  the  "Notes."  The Notes and all other
documents evidencing,  securing,  guaranteeing or otherwise related to the Lines
of Credit or the Letters of Credit,  including any modifications,  restatements,
extensions, renewals and replacements thereof, are collectively called the "Loan
Documents," which term shall also include the Modification Agreement (as defined
below).

     D. GSE Power, MSHI, GSE Process, the Guarantor,  the Lender and others have
entered into a Modification  Agreement of even date herewith (the  "Modification
Agreement"), pursuant to which the Guarantor agreed to execute this Guaranty.

     NOW, THEREFORE, WITNESSETH, in consideration of the agreement of the Lender
to enter into the  Modification  Agreement,  the Guarantor  hereby covenants and
agrees as follows:

     The undersigned  hereby guarantees to the Lender that payment of principal,
interest,  late charges and any other sums payable under the Notes shall be made
according to the terms of the Notes without  deduction by reason of any set-off,
defense  or   counterclaim,   irrespective  of  any  invalidity   therein,   the
unenforceability thereof or the insufficiency, invalidity or unenforceability of
any  security  therefor,  and  hereby  unconditionally  consent  to  the  terms,
covenants and conditions of the Notes and the other Loan  Documents;  and hereby
consents,  without notice to the undersigned,  to the extension,  in whole or in
part from  time to time,  whether  or not for a term in  excess of the  original
term,  of the  payment of the Notes;  and agrees in case the dates of payment of
the Notes shall be extended in whole or in part,  that all moneys due thereunder
shall be paid when due according to such  extension or  extensions;  and further
consents  to the  waiving or  amendment  by the Lender of any term,  covenant or
condition  of the Notes or the other  Loan  Documents  or of any  indulgence  or
release granted  thereunder;  and further consents to any changes or alterations
which may be made in any term, covenant or condition of the Loan Documents;  and
agrees that no change, alteration, modification, renewal, or extension of any of
the Loan  Documents  shall  alter  or  affect  the  liability  of the  Guarantor
hereunder;  and further consents to the release of any collateral the Lender may
have  under  the  Loan  Documents  or to the  subordination  of the  Loan or the
collateral  securing the Loan to any other debt or security  interest under such
terms  and  conditions  as the  Lender  may  agree to in its  sole and  absolute
discretion;  and further hereby waives  presentment,  demand of payment from the
maker, protest and notice of nonpayment.

     If the  Borrowers  shall fail to make any  payment of any sum due under the
Notes, or if the Borrowers  shall default in any term,  covenant or condition of
the Loan Documents,  then the undersigned hereby  unconditionally  guarantees to
the Lender that the  undersigned  shall (without  first  requiring the Lender to
proceed against the Borrowers,  or any other security) (1) pay to the Lender the
entire unpaid  balance with interest and costs,  and (2) cure any default in any
term,  covenant or  condition of the Loan  Documents.  The  undersigned  further
agrees to  indemnify  and hold  harmless,  the Lender  from any loss  (including
actual  attorneys'  fees)  resulting  from any  default  made at any time by the
Borrowers  in any terms of the Loan  Documents or by the  undersigned  under the
terms of this Guaranty.

     The undersigned  hereby waives notice of acceptance of this Guaranty by the
Lender and any and all notices and demands of every kind and  description  which
may be required  to be given by any  statute or rule of law,  and agree that the
liability of the undersigned  hereunder shall in no way be affected,  diminished
or released by any forbearance  which may be granted to the Borrowers (or to any
successor  to it or to any  person  or  entity  which  shall  have  assumed  the
obligations  of the  Borrowers  under the  Notes) or by any  waiver of any term,
covenant or  condition  in the Loan  Documents by the Lender or by reason of any
change or  modification  in any of the Loan  Documents,  or by the acceptance of
additional  security  or the  release  by the Lender of any  security  or of any
person or entity primarily or secondarily liable.

     The  Guarantor  agrees  that this  Guaranty  may be  enforced by the Lender
without  the  necessity  at any time of  resorting  to or  exhausting  any other
security or collateral and without the necessity at any time of having  recourse
to the Notes or  enforcing  any rights it may have  against any other  person or
entity.  The  undersigned  further  agrees that nothing herein  contained  shall
prevent  the Lender from suing on the Notes or from  exercising  any other right
available  to it under the Notes or any of the other Loan  Documents  or against
any other person or entity, and the exercise of any of the aforementioned rights
shall not constitute a legal or equitable discharge of the undersigned, it being
the purpose and intent of the undersigned that his/her or its obligations  under
this  Guaranty   shall  be  absolute  and   unconditional   under  any  and  all
circumstances  and s/he or it shall be released  therefrom  only upon payment of
all sums due hereunder and under the Notes and the other Loan Documents.

     This Guaranty shall continue to be effective or be reinstated,  as the case
may be, if at any time any payment is rescinded or must otherwise be returned by
the Lender upon the insolvency, bankruptcy or reorganization of the Borrowers or
otherwise, all as though such payment had not been made.

     Any  indebtedness  of the  Borrowers  to the  Guarantor,  now or  hereafter
existing,  is hereby  subordinated  to the  indebtedness of the Borrowers to the
Lender.  The Guarantor agrees that, after a default (including the expiration of
any applicable cure period) in any term, covenant,  or condition of the Notes or
the other Loan  Documents  and until the  indebtedness  of the  Borrowers to the
Lender has been paid in full, the Guarantor will not seek, accept, or retain for
the Guarantor's  own account,  any payment from the Borrowers on account of such
subordinated  debt.  Following  a  default  (including  the  expiration  of  any
applicable cure period) in any term, covenant,  or condition of the Notes or the
other  Loan  Documents,  any  payments  to the  Guarantor  on  account  of  such
subordinated  debt shall be collected and received by the Guarantor in trust for
the Lender  and shall be paid over to the Lender on account of the  indebtedness
of the Borrowers to the Lender without impairing or releasing the obligations of
the Guarantor  hereunder.  Until ninety-five (95) days after the indebtedness of
the  Borrowers  to the  Lender  has been  paid in  full,  the  Guarantor  hereby
unconditionally  and  irrevocably  agrees that (1) the Guarantor will not at any
time assert  against the  Borrowers (or the  Borrowers'  estate in the event the
Borrowers  becomes  bankrupt or becomes  the  subject of any case or  proceeding
under the bankruptcy laws of the United States of America) any right or claim to
indemnification,  reimbursement, contribution, or payment for or with respect to
any and all amounts the  Guarantor  may pay or be  obligated  to pay the Lender,
including,  without limitation, the indebtedness of the Borrowers to the Lender,
and any and all  obligations  which  the  Guarantor  may  perform,  satisfy,  or
discharge,  under or with respect to this Guaranty and (2) the Guarantor  waives
and  releases  all such  rights  and claims to  indemnification,  reimbursement,
contribution, or payment which the Guarantor may have now or at any time against
the  Borrowers  (or the  Borrowers'  estate in the event the  Borrowers  becomes
bankrupt or becomes the subject of any case or proceeding  under the  bankruptcy
laws of the United States of America).

     The undersigned  hereby  authorizes any clerk of any court of record or any
attorney  to  enter in any  court  of  competent  jurisdiction  in the  State of
Maryland  or any other  State or  Territory  of the United  States  judgment  by
confession  against  the  undersigned  in favor  of the  Lender  for the  entire
principal  amount of the Notes then  remaining  unpaid  with  interest  thereon,
together with attorneys' fees of fifteen percent (15%) and court costs,  without
stay of  execution  or right of appeal  expressly  waiving  the  benefit  of all
exemption  laws and all  irregularity  or error in entering said judgment or the
execution thereon. No single exercise of the foregoing power to confess judgment
shall be deemed to exhaust the power,  whether or not any such exercise shall be
held by any court to be invalid,  voidable or void, but the power shall continue
undiminished,  and it may be exercised  from time to time as often as the Lender
shall elect,  until such time as the Lender shall have received  payment in full
of all  indebtedness  of the  Borrowers  to the Lender  together  with costs and
indebtedness  of  the  undersigned  under  this  Guaranty.  Notwithstanding  the
Lender's  right to  obtain  a  confessed  judgment  which  includes  an award of
attorneys'  fees of 15% of the unpaid  principal  sum, the Lender agrees that at
such time as all  indebtedness  under the Notes is fully paid,  the Lender shall
only be entitled to recover its actual  attorneys' fees and expenses incurred in
connection with the Notes.

     The  undersigned  hereby  waives all right to trial by jury of all  claims,
defenses,  counterclaims  and suits of any kind arising from or relating to this
Guaranty.  The  undersigned  acknowledges  that  s/he or it  makes  this  waiver
voluntarily  and  knowingly  after  consultation  with counsel of his/her or its
choice. The undersigned agrees that all such claims, defenses, counterclaims and
suits shall be tried before a judge of competent jurisdiction, without a jury.

     All  laws  exempting  real  or  personal   property  from  execution,   and
inquisition and extension upon any levy on real or personal  property are hereby
waived and  condemnation  agreed to, and no benefit of exemption will be claimed
under or by virtue of any exemption  law now in force or which  hereafter may be
passed.

     The undersigned hereby waives promptness,  diligence,  notice of acceptance
and any other notice with respect to any of the terms,  covenants or  conditions
of this Guaranty or any of the other Loan Documents and any requirement that the
Lender protect,  secure,  perfect or insure any security interest or lien or any
property  subject  thereto or exhaust  any right or take any action  against the
Borrowers or any other person or entity or any collateral.

     Notwithstanding  anything  to the  contrary  contained  herein,  the Lender
agrees to notify the undersigned  upon the occurrence of an Event of Default (as
defined in the Modification Agreement).

     The undersigned hereby requests the Lender, if it wishes to send any notice
to the undersigned,  although all notices and demands have been waived except as
set forth in the  immediately  preceding  paragraph,  to send such notice to the
undersigned  at  12015  Lee  Jackson  Highway,  8th  Floor,  Fairfax,   Virginia
22033-3300, Attention: Jodee E. Batdorf, Esquire.

     The  undersigned  hereby  acknowledges,  consents  and  agrees (1) that the
provisions of this Guaranty and the rights of all parties mentioned herein shall
be governed by the laws of the State of Maryland and  interpreted  and construed
in accordance with such laws (excluding  Maryland conflict of laws) and (2) that
the United States  District  Court for the District of Maryland and any court of
competent  jurisdiction of the State of Maryland shall have  jurisdiction in any
proceeding instituted to enforce this Guaranty,  and any objections to venue are
hereby waived.

     A default  (including the expiration of any applicable  cure period) in any
term,  covenant,  or  condition of the Notes or the other Loan  Documents  shall
constitute and be deemed a default under this Guaranty.

     Upon a  default  under  this  Guaranty,  including  the  expiration  of any
applicable  grace or cure  periods,  the Lender  may,  at its option and without
notice or demand,  declare an amount equal to the  remainder  of the  Borrowers'
obligations  under the Loan Documents to be  immediately  due and payable by the
Guarantor,  whether or not the same are due and payable by the Borrowers at that
time.  The books  and  records  of the  Lender  showing  the  amount  due by the
Borrowers  shall be binding upon the Guarantor  for the purpose of  establishing
such items and shall be prima facie proof thereof.  The Guarantor  agrees to pay
the Lender's  actual  attorneys' fees and all other costs and expenses which may
be incurred by the Lender in the  enforcement of this  Guaranty,  whether or not
suit is filed.

     The rights, powers,  privileges and discretions (the "rights") to which the
Lender may be entitled  hereunder  shall inure to the benefit of its  successors
and assigns. All the rights of the Lender are cumulative and not alternative and
may be enforced successively or concurrently.  Failure of the Lender to exercise
any of its rights  shall not be deemed a waiver  thereof and no waiver of any of
its  rights  shall be  deemed  to  apply to any  other  rights  nor  shall it be
effective unless in writing and signed by the Lender.  The terms,  covenants and
conditions  of or imposed  upon the  undersigned  herein  shall be binding  upon
his/her or its personal representatives, successors and assigns.

     In case any  provision  (or any part of any  provision)  contained  in this
Guaranty shall for any reason be held to be invalid, illegal or unenforceable in
any respect,  such invalidity,  illegality or unenforceability  shall not affect
any other  provision  (or  remaining  part of the  affected  provision)  of this
Guaranty but this  Guaranty  shall be construed as if such  invalid,  illegal or
unenforceable  provision (or part thereof) had never been  contained  herein but
only to the extent it is invalid, illegal or unenforceable.

     Notwithstanding   anything   to  the   contrary   contained   herein,   the
undersigned's  liability  under this  Guaranty  shall be  limited to  $1,500,000
(subject to increase as set forth in the  immediately  succeeding  paragraph) of
the principal and interest due under the Notes  (including any amounts which may
be or become due upon a draw under any Letters of Credit),  which  amount  shall
not be reduced by any payments from the  Borrowers,  any other  guarantor or any
other source unless and until the  outstanding  principal and interest due under
the Notes is less than $1,500,000 (or $1,500,000  plus the Increased  Amount (as
defined in the immediately succeeding paragraph) as applicable).  There shall be
no limit on the undersigned's  liability for costs of collection incurred by the
Lender to enforce  this  Guaranty.  The  undersigned  agrees to pay the Lender's
actual  attorneys' fees and all other costs and expenses that may be incurred by
the Lender in the  enforcement of this  Guaranty,  whether or not suit is filed.
This  limitation  on  liability  is not  intended  and  shall  not in any way be
construed  to require the Lender to pursue its remedies  against the  Borrowers,
any other guarantor or any collateral before exercising its remedies against the
undersigned.  Notwithstanding the foregoing, the Lender agrees that at such time
as the  undersigned  has paid to the Lender such  $1,500,000 (or $1,500,000 plus
the Increased  Amount (as defined in the  immediately  succeeding  paragraph) as
applicable) plus all actual  attorneys' fees and all other costs and expenses of
collection  incurred  by the  Lender as of the date the  undersigned  makes such
payment to the Lender,  the undersigned  shall have no further liability for any
remaining  indebtedness  due under the Notes or any attorneys' fees or costs and
expenses  incurred  by the  Lender  after the date the  undersigned  makes  such
payment to the Lender,  provided that such  agreement  shall be null and void if
the  Lender  is  required  by a court of  competent  jurisdiction  under a final
non-appealable  order  to  return  all or any  portion  of such  payment  to the
undersigned,  a trustee in bankruptcy, a receiver or any other third party, as a
preference,  fraudulent  conveyance or for any other reason under any applicable
federal or state law.

     Notwithstanding  the  foregoing,  the  liability of the  undersigned  shall
increase from  $1,500,000  to  $1,500,000  plus an amount equal to fifty percent
(50%) of any amounts  drawn by the  beneficiary  of Letter of Credit No.  405600
and/or  any  replacement  for such  Letter  of  Credit  issued  pursuant  to the
Modification  Agreement on or prior to their  respective  expiration  dates (the
"Increased   Amount").   Such  increase  shall  be  effective   immediately  and
automatically upon any such draw(s).

     This Guaranty  replaces and  supercedes  all prior  guaranties  made by the
undersigned.

     Time is of the essence.

     IN WITNESS  WHEREOF,  the undersigned has executed this Guaranty under seal
effective as of the date first above written.

WITNESS/ATTEST:                          MANTECH INTERNATIONAL CORPORATION


                                         By:/S/   MATTHEW P. GALASKI     (SEAL)
- -------------------------------------       -----------------------------------

                                            Name: Matthew P. Galaski            
                                                 ------------------------------

                                           Title: Vice President
                                                 ------------------------------

STATE OF ______________________                    
                                         SS:
CITY/COUNTY OF _______________         

     I HEREBY CERTIFY that on this __________ day of ___________, 19____, before
me, the  undersigned  officer,  personally  appeared  ____________________,  who
acknowledged   himself/herself  to  be  the   ____________________   of  ManTech
International Corporation, and that (s)he, in such capacity, being authorized to
do so, executed the foregoing instrument for the purposes therein contained,  by
signing the name of ManTech International  Corporation,  as ____________________
of ManTech International Corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and Notarial Seal.


                                         --------------------------------------
                                         Notary Public
My Commission expires:


                                                                    EXHIBIT 21.1

                                GSE SYSTEMS, INC.
                                    FORM 10-K
                      For the Year Ended December 31, 1998



SUBSIDIARIES OF REGISTRANT


     The  companies  listed below are directly or  indirectly  owned 100% by GSE
Systems,  Inc. and are included in its  consolidated  financial  statements.  GS
Information  Systems FSC Ltd, GSE Systems  International  Ltd,  MSHI,  Inc., GSE
Power Systems AB and GSE Process  Solutions,  Inc. are wholly owned subsidiaries
of GSE Systems,  Inc. GP  International  Engineering & Simulation,  Inc. and GSE
Services Company L.L.C. are wholly owned subsidiaries of GSE Power Systems, Inc.
which is a wholly owned subsidiary of MSHI, Inc. GSE Process Solutions B.V. is a
wholly owned subsidiary of GSE Process  Solutions,  Inc.  GSE Process  Solutions
Belgium N.V. and GSE Process Solutions  Singapore (Pte) Limited are wholly owned
subsidiaries  of GSE Process  Solutions B.V. J. L. Ryan,  Inc.,  acquired by GSE
Power  Systems,  Inc. in December  1997, has been merged with and into GSE Power
Systems,  Inc. as of  February  1998,  with GSE Power  Systems,  Inc.  being the
surviving corporation.


Name                                                Jurisdiction of Organization
- ----                                                ----------------------------
GS Information Systems FSC Ltd.                     Barbados
GSE Systems International Ltd.                      State of Delaware
MSHI, Inc.                                          State of Virginia
GSE Power Systems, Inc.                             State of Delaware
GP International Engineering & Simulation, Inc.     State of Delaware
GSE Services Company L.L.C.                         State of Delaware
GSE Power Systems AB                                Sweden
GSE Process Solutions, Inc.                         State of Delaware
GSE Process Solutions B.V.                          Netherlands
GSE Process Solutions Belgium N.V.                  Belgium
GSE Process Solutions Singapore (Pte) Limited       Singapore



                                                                    Exhibit 24.1
                                GSE SYSTEMS, INC.

                                    FORM 10-K

                      For the Year Ended December 31, 1998

                       CONSENT OF INDEPENDENT ACCOUNTANTS


     We consent to the incorporation by reference in the registration  statement
of GSE  Systems,  Inc.  on Form S-8 (File No.  333-08805)  of our  report  dated
February 24, 1999, on our audits of the consolidated financial statements of GSE
Systems, Inc. as of December 31, 1998 and 1997, and for the years ended December
31, 1998, 1997, and 1996, which report is included in this Annual Report on Form
10-K.










                                                     PricewaterhouseCoopers, LLP
McLean, Virginia
March 29, 1999



                                                                    EXHIBIT 24.1
                                GSE SYSTEMS, INC.
                              9189 Red Branch Road
                            Columbia, Maryland 21045


                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS that the undersigned  Officers and Directors
of GSE Systems,  Inc., a Delaware  corporation,  hereby  constitute  and appoint
Christopher  M. Carnavos,  Jeffery G. Hough and Stephen J. Fogarty,  and each of
them, the true and lawful agents and  attorneys-in-fact  of the undersigned with
full power and authority in said agents and attorneys-in-fact, and in any one or
both of them, to sign,  for the  undersigned  and in their  respective  names as
Officers and Directors of the  Corporation the Annual Report on Form 10-K of the
Corporation to be filed with the Securities and Exchange Commission, Washington,
D.C., under the Securities  Exchange Act of 1934, as amended,  and any amendment
or amendments to such Annual  Report;  hereby  ratifying and confirming all acts
taken by such  agents  and  attorneys-in-fact,  or any one or more of  them,  as
herein authorized.

Dated:   March 26, 1999



         Name                            Title

/S/ JEROME I. FELDMAN             Chairman of the Board
- ---------------------------         
    Jerome I. Feldman

/S/ CHRISTOPHER M. CARNAVOS       President and Director
- ---------------------------       (Principal Executive Officer)
    Christopher M. Carnavos
                                  Senior Vice President and Chief Financial 
/S/ JEFFERY G. HOUGH              Officer  (Principal Finance and Accounting 
- ---------------------------       Officer)
    Jeffery G. Hough

/S/  SHELDON L. GLASHOW           Director 
- ---------------------------       
     Sheldon L. Glashow

/S/ JOHN A. MOORE, JR.            Director
- ---------------------------         
    John A. Moore, Jr.

/S/ GEORGE J. PEDERSEN            Director  
- ---------------------------        
    George J. Pedersen

/S/ SYLVAN SCHEFLER               Director  
- -------------------------         
    Sylvan Schefler




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