MISTRAS Group, Inc. announced that its Board of Directors appointed Dennis Bertolotti as its President and Chief Executive Officer, effective August 10, 2017, succeeding the company's Chairman, Dr. Sotirios Vahaviolos. Dr. Vahaviolos will remain active in the business as Executive Chairman, focusing on strategy and technology, and will continue to lead the Board of Directors. Mr. Bertolotti has also been elected to serve on the company's Board of Directors commencing August 10, 2017.

The Board also elevated Jonathan Wolk to the position of Senior Executive Vice President and Chief Operating Officer, also effective August 10, 2017. Mr. Wolk will continue serving as the company's Chief Financial Officer until a new CFO is appointed. Mr. Wolk joined MISTRAS as Executive Vice President and CFO in November 2013 and became Senior Executive Vice President in 2016.

Prior to joining MISTRAS, Mr. Wolk served as Senior Vice President and CFO for American Woodmark for almost 10 years, and served in various executive and management positions before then.