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EX-32.2 - CFO CERTIFICATION - Mistras Group, Inc.mg-2017123110kexhibit322.htm
EX-32.1 - CEO CERTIFICATION - Mistras Group, Inc.mg-2017123110kexhibit321.htm
EX-31.2 - CFO CERTIFICATION - Mistras Group, Inc.mg-2017123110kexhibit312.htm
EX-31.1 - CEO CERTIFICATION - Mistras Group, Inc.mg-2017123110kexhibit311.htm
EX-23.1 - AUDITORS CONSENT - Mistras Group, Inc.a123117consentexhibit231.htm
EX-10.19 - DIRECTOR COMPENSATION - Mistras Group, Inc.mg-2017123110kexhibit1019.htm
EX-10.3 - CREDIT AGREEMENT - Mistras Group, Inc.creditagreement.htm
10-K - 10-K - Mistras Group, Inc.mg-2017123110k.htm
Exhibit 21.1

The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary.

 
 
Other Names under which
 
Jurisdiction of
Name
 
Subsidiary Does Business
 
Organization
Aetos Group, Inc.
 
 
 
Delaware
Carmagen Engineering International, Inc.
 
 
 
New Jersey
CISMIS Springfield Corp.
 
 
 
Delaware
Conam Inspection and Engineering Services, Inc.
 
 
 
Delaware
Conam Inspection Services Inc.
 
 
 
Delaware
GMA Aeronautica S.L.U.
 
 
 
Germany
GMA Engineering GmbH
 
 
 
Germany
GMA Holding B.V.
 
 
 
The Netherlands
GMA Werkstoffprufung GmbH
 
 
 
Germany
Mistras Arizona Inspection Services Inc.
 
 
 
Delaware
Mistras Canada, Inc.
 
 
 
Canada
Mistras GMA Holdings GmbH
 
 
 
Germany
Mistras Group B.V.
 
 
 
The Netherlands
Mistras Group GmbH
 
 
 
Germany
Mistras Group Limited
 
 
 
United Kingdom
Mistras Group SAS
 
 
 
France
Mistras Group Hellas A.B.E.E.
 
 
 
Greece
Mistras International Holdings Inc.
 
 
 
Delaware
Mistras Quebec Holdings Inc.
 
 
 
Canada
Mistras Services Inc.
 
 
 
Canada
MWC Management Inc.
 
 
 
Canada
NDT do Brasil Ltd.
 
 
 
Brazil
Physical Acoustics Corporation
 
 
 
Delaware
Physical Acoustics India Private Ltd.
 
 
 
India
Physical Acoustics South America Ltda.
 
 
 
Brazil
Quality Services Laboratories, Inc.
 
 
 
Delaware
QSL NDT Inc.
 
 
 
Delaware
QSL NDT Quebec Inc.
 
 
 
Canada
R.A.C. Group Inc.
 
 
 
Canada
Rope Access Calgary, Inc.
 
 
 
Canada
The Nacher Corporation
 
 
 
Louisiana
ThermTech Services, Inc.
 
 
 
Florida