POWER OF ATTORNEY
    The undersigned, being a person required to file reports pursuant to
Section 16 of the Securities Exchange Act of 1934 (the "Exchange Act")
regarding the undersigned?s beneficial ownership of equity securities in
Mistras Group, Inc. (the "Company"), hereby constitutes and appoints each
of Michael Keefe, Edward Prajzner and Melissa Beaumont, signing singly,
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
Exchange Actor any rule or regulation of the SEC;

(2)	execute for and on behalf of the undersigned, as a Section 16
reporting person of the Company, Forms 3, 4, and 5 in accordance with
Section 16(a) of the Exchange Act and the rules thereunder, and any other
forms or reports the undersigned may be required to file in connection with
the undersigned's ownership, acquisition, or disposition of securities of
the Company;

(3)	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, or 5, or other form or report, and timely file such form or report with
the SEC and any stock exchange or similar authority; 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-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 powersherein 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.

	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 attorneys-in-fact.  This Power of Attorney supersedes and revokes
all previous Powers of Attorney regarding the undersigned?s obligations under
Section 16 of the Exchange Act in connection with the undersigned?s beneficial
ownership of equity securities in the Company.

Dated:  May 14, 2019


						       /s/ Jonathan T. Wolk