<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>fortinosec.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
POWER OF ATTORNEY




      Know all by these presents that the undersigned hereby
constitutes and appoints Robert Buckley, Paula A. Pluta and
Joanna Tow as his true and lawful attorneys-in-fact to:
(1)	execute for and on behalf of the
undersigned Forms 3, 4 and 5 in
accordance with Section 16(a) of the
Securities Exchange Act of 1934, as
amended, and the rules thereunder, for
and in relation to any and all reportable
transactions in the securities of GSI
Group, Inc.;
(2)	do and perform any and all acts for and
on behalf of the undersigned which may
be necessary or desirable to complete the
execution of any such Form 3, 4 and 5
and timely filing of such forms with the
United States Securities and Exchange
Commission and any other authority; and
(3)	take any other action of any type
whatsoever in connection with the
foregoing which, in the opinion of such
attorneys-in-fact, may be of benefit to, in
the best interest of, or legally required by,
the undersigned, it being understood that
the documents executed by such
attorneys-in-fact on behalf of the
undersigned pursuant to this Power of
Attorney shall be in such form and shall
contain such terms and conditions as such
attorneys-in-fact may approve in their
discretion.
      The undersigned hereby grants to each attorney-in-fact,
individually, full power and authority to do and perform all and
every act and thing whatsoever requisite, necessary and proper
to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as each attorney-in-
fact might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming that
each attorney-in-fact, or his substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted.  The
undersigned acknowledges that the foregoing attorneys-in-fact,
in serving in such capacity at the request of the undersigned, are
not assuming any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934,
as amended.
      IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 21st day of
December, 2011.


	/s/ Dennis J.
Fortino
	Signature

	Dennis J. Fortino
	Print Name
</TEXT>
</DOCUMENT>
