Exhibit 1

CUSIP No. 60649T107 Page 1 of 1 Pages

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree, as of July 9, 2024, that only one statement containing the information required by Schedule 13D, and each amendment thereto, need be filed with respect to the ownership of each of the undersigned of shares of common stock of Mistras Group, Inc., a Delaware corporation, and the statement to which this Joint Filing Agreement is attached as Exhibit 1 is filed on behalf of each of the undersigned.

MILL ROAD CAPITAL III, L.P.
By:	Mill Road Capital III GP LLC,
	its General Partner
By:	/s/ Thomas E. Lynch
	Thomas E. Lynch
	Chairman and Management Committee Director
MILL ROAD CAPITAL III GP LLC
By:	/s/ Thomas E. Lynch
	Thomas E. Lynch
	Chairman and Management Committee Director
THOMAS E. LYNCH
/s/ Thomas E. Lynch