<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED CONDENSED BALANCE SHEET AS OF JUNE 30, 2000 (UNAUDITED) AND THE
CONSOLIDATED CONDENSED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30,
2000 (UNAUDITED), OF GTS DURATEK, INC. AND SUBSIDIARIES, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 7,006,051
<SECURITIES> 0
<RECEIVABLES> 49,839,153
<ALLOWANCES> (956,097)
<INVENTORY> 2,195,766
<CURRENT-ASSETS> 102,611,602
<PP&E> 146,653,212
<DEPRECIATION> (62,361,978)
<TOTAL-ASSETS> 282,813,917
<CURRENT-LIABILITIES> 85,352,401
<BONDS> 0
15,636,821
0
<COMMON> 148,238
<OTHER-SE> 65,877,827
<TOTAL-LIABILITY-AND-EQUITY> 282,813,917
<SALES> 0
<TOTAL-REVENUES> 93,874,344
<CGS> 0
<TOTAL-COSTS> 69,122,091
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 2,020,033
<INCOME-PRETAX> 8,976,321
<INCOME-TAX> 3,538,583
<INCOME-CONTINUING> 5,437,738
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 5,387,738
<EPS-BASIC> 0.35
<EPS-DILUTED> 0.28
</TABLE>
