LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS

Know all by these present that the undersigned hereby makes
constitutes and appoints and Frederic G. Hammond
signing singly and acting individually, as the undersigneds
true and lawful attorney in fact with full power and
authority as hereinafter described to
1	execute for and on behalf of the undersigned in the
undersigned's capacity as an officer and or director of Aspen
Technology Inc. the Company Forms 3 4 and 5 including
any amendments thereto in accordance with Section 16a of the
Securities Exchange Act of 1934 and the rules thereunder the
Exchange Act
2	do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to prepare
complete and execute any such Form 3 4 or 5 prepare, complete
and execute any amendment or amendments thereto and timely
deliver and file such form with the United States Securities and
Exchange Commission and any stock exchange or similar authority
3	seek or obtain as the undersigneds representative and on
the undersigneds behalf information regarding transactions in
the Companys securities from any third party including brokers
employee benefit plan administrators and trustees and the
undersigned hereby authorizes any such person to release any such
information to such attorney in fact and approves and ratifies
any such release of information and
4	take any other action of any type whatsoever in connection
with the foregoing which in the opinion of such
attorney 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 attorney 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
attorney in fact may approve in such attorney in facts
discretion.
The undersigned hereby grants such attorney in fact full
power and authority to do and perform any and every act and thing
whatsoever requisite necessary or proper to be done in the
exercise of any of the rights and powers herein granted as fully
to all intents and purposes as the undersigned might or could do
if personally present with full power of substitution or
revocation hereby ratifying and confirming all that such
attorney in fact or such attorney in facts 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
attorney in fact in serving in such capacity at the request of
the undersigned are not assuming nor relieving nor is the
Company assuming nor relieving any of the undersigneds
responsibilities to comply with Section 16 of the Exchange Act.
The undersigned acknowledges that neither the Company nor the
foregoing attorney in fact assume i any liability for the
undersigneds responsibility to comply with the requirement of
the Exchange Act ii any liability of the undersigned for any
failure to comply with such requirements or iii any obligation
or liability of the undersigned for profit disgorgement under
Section 16b of the Exchange Act.
This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3 4
and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company unless earlier
revoked by the undersigned in a signed writing delivered to the
foregoing attorney in fact.
IN WITNESS WHEREOF the undersigned has caused this Power of
Attorney to be executed as of this 15th day of April 2010.
/s/ Mark E. Fusco
Mark E. Fusco




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