<PAGE>
EXHIBIT (16)
Executed Powers of Attorney
<PAGE>
POWER OF ATTORNEY
The undersigned, being a Trustee of the HighMark Funds, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest and Alyssa
Albertelli each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things
and to execute any and all instruments that said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to
enable HighMark Funds to comply with the Investment Company Act of 1940, as
amended, and the Securities Act of 1933, as amended ("Acts"), and any rules,
regulations or requirements of the Securities and Exchange Commission in
respect thereof, and in connection with the filing and effectiveness of any
registration statement or statement of HighMark Funds pursuant to said Acts
and any and all amendments thereto (including post-effective amendments),
including specifically, but without limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the undersigned
as a Trustee of HighMark Funds any and all such amendments filed with the
Securities and Exchange Commission under said Acts, any Notification of
Registration under the Investment Company Act of 1940 and any other
instruments or documents related thereto, and the undersigned does hereby
ratify and confirm all that said attorneys and agents, or either of them,
shall do or cause to be done by virtue thereof.
SIGNATURE TITLE DATE
/S/ MARK E. NAGLE President October 10, 1998
-----------------
Mark E. Nagle
-12-
<PAGE>
POWER OF ATTORNEY
The undersigned, being a Trustee of the HighMark Funds, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest and Alyssa
Albertelli each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things
and to execute any and all instruments that said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to
enable HighMark Funds to comply with the Investment Company Act of 1940, as
amended, and the Securities Act of 1933, as amended ("Acts"), and any rules,
regulations or requirements of the Securities and Exchange Commission in
respect thereof, and in connection with the filing and effectiveness of any
registration statement or statement of HighMark Funds pursuant to said Acts
and any and all amendments thereto (including post-effective amendments),
including specifically, but without limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the undersigned
as a Trustee of HighMark Funds any and all such amendments filed with the
Securities and Exchange Commission under said Acts, any Notification of
Registration under the Investment Company Act of 1940 and any other
instruments or documents related thereto, and the undersigned does hereby
ratify and confirm all that said attorneys and agents, or either of them,
shall do or cause to be done by virtue thereof.
SIGNATURE TITLE DATE
/S/ ROBERT J. DELLACROCE Treasurer and October 10, 1998
------------------------ Chief Financial Officer
Robert J. DellaCroce
<PAGE>
POWER OF ATTORNEY
The undersigned, being a Trustee of the HighMark Funds, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest and Alyssa
Albertelli each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things
and to execute any and all instruments that said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to
enable HighMark Funds to comply with the Investment Company Act of 1940, as
amended, and the Securities Act of 1933, as amended ("Acts"), and any rules,
regulations or requirements of the Securities and Exchange Commission in
respect thereof, and in connection with the filing and effectiveness of any
registration statement or statement of HighMark Funds pursuant to said Acts
and any and all amendments thereto (including post-effective amendments),
including specifically, but without limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the undersigned
as a Trustee of HighMark Funds any and all such amendments filed with the
Securities and Exchange Commission under said Acts, any Notification of
Registration under the Investment Company Act of 1940 and any other
instruments or documents related thereto, and the undersigned does hereby
ratify and confirm all that said attorneys and agents, or either of them,
shall do or cause to be done by virtue thereof.
SIGNATURE TITLE DATE
/S/ THOMAS L. BRAJE Trustee
----------------------
Thomas L. Braje
/S/ DAVID A. GOLDFARB Trustee
----------------------
David A. Goldfarb
/S/ WILLIAM R. HOWELL Trustee
----------------------
William R. Howell
/S/ JOSEPH C. JAEGER Trustee
----------------------
Joseph C. Jaeger
/S/ FREDERICK J. LONG Trustee
----------------------
Frederick J. Long
/S/ PAUL L. SMITH Trustee
----------------------
Paul L. Smith
<PAGE>
POWER OF ATTORNEY
The undersigned, being a Trustee of the HighMark Funds, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest and Alyssa
Albertelli each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things
and to execute any and all instruments that said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to
enable HighMark Funds to comply with the Investment Company Act of 1940, as
amended, and the Securities Act of 1933, as amended ("Acts"), and any rules,
regulations or requirements of the Securities and Exchange Commission in
respect thereof, and in connection with the filing and effectiveness of any
registration statement or statement of HighMark Funds pursuant to said Acts
and any and all amendments thereto (including post-effective amendments),
including specifically, but without limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the undersigned
as a Trustee of HighMark Funds any and all such amendments filed with the
Securities and Exchange Commission under said Acts, any Notification of
Registration under the Investment Company Act of 1940 and any other
instruments or documents related thereto, and the undersigned does hereby
ratify and confirm all that said attorneys and agents, or either of them,
shall do or cause to be done by virtue thereof.
SIGNATURE TITLE DATE
/S/ MICHAEL L. NOEL Trustee September 9, 1999
-------------------
Michael L. Noel
<PAGE>
POWER OF ATTORNEY
The undersigned, being a Trustee of the HighMark Funds, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest and Alyssa
Albertelli each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things
and to execute any and all instruments that said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to
enable HighMark Funds to comply with the Investment Company Act of 1940, as
amended, and the Securities Act of 1933, as amended ("Acts"), and any rules,
regulations or requirements of the Securities and Exchange Commission in
respect thereof, and in connection with the filing and effectiveness of any
registration statement or statement of HighMark Funds pursuant to said Acts
and any and all amendments thereto (including post-effective amendments),
including specifically, but without limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the undersigned
as a Trustee of HighMark Funds any and all such amendments filed with the
Securities and Exchange Commission under said Acts, any Notification of
Registration under the Investment Company Act of 1940 and any other
instruments or documents related thereto, and the undersigned does hereby
ratify and confirm all that said attorneys and agents, or either of them,
shall do or cause to be done by virtue thereof.
SIGNATURE TITLE DATE
/S/ ROBERT M. WHITLER Trustee September 9, 1999
---------------------
Robert M. Whitler