Power of Attorney Relating to Section 16 Filings
Know all by these presents, that the undersigned hereby constitutes and appoints each of Michael Cain,
Silvia Martinez, Debra Collins and Ella Crawley with full power of substitution and resubstitution, the
undersigned's true and lawful attorney-in-fact to:
(1) prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S.
Securities and Exchange Commission (the "SEC") a Form ID, including amendments thereto, and any
other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to
make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act
of 1934, as amended (the "Exchange Act") or any rule or regulation of the SEC;
(2) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or
director of Aspen Insurance Holdings Limited (the "Company"), any Form 3, 4, and 5 in accordance with
Section 16(a) of the Exchange Act;
(3) prepare and sign on behalf of the undersigned any Form 144 Notice under the Securities Act of
1933, as amended (the "Securities Act"), and file the same with the SEC;
(4) do and perform any and all acts for and on behalf of the undersigned which may be necessary or
desirable to complete and execute any such Form 3, 4, 5, or 144, complete and execute any
amendment or amendments thereto, and timely file such form with the SEC and any stock exchange or
similar authority; and
(5) 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-fact's discretion.
The undersigned hereby grants to each 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-fact's 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, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Exchange Act or Section 5 of the Securities Act or Rule
144 promulgated under such Act.
This Power of Attorney shall remain in effect until the undersigned is no longer required to file Forms 3,
4, 5 and 144 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
attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 22 day of May, 2017.
/s/Tim Aman
Tim Aman
