MISTRAS Group, Inc. announced it has elevated members of its organizational leadership team. Dennis M. Bertolotti has been promoted to President and Chief Operating Officer (COO) of MISTRAS Group worldwide. Jonathan H. Wolk now holds the title of Senior Executive Vice President, and will continue to serve as Chief Financial Officer (CFO) and Treasurer.

The changes will be effective June 1, 2016. Both executives will continue to report to Dr. Sotirios J. Vahaviolos, MISTRAS Group's Chairman and Chief Executive Officer, and operate from the company's world headquarters in Princeton Junction, New Jersey, USA.