Matrix Service Company Acquires Houston Interests, LLC, Expanding Process Design, Engineering and Construction ... GlobeNewswire (press release) TULSA, Okla., Dec. 13, 2016 (GLOBE NEWSWIRE) -- Matrix Service Company (Nasdaq:MTRX) announced today that its subsidiary, Matrix PDM Engineering Inc. has acquired privately-held, Tulsa-based Houston Interests, LLC, a premier global solutions ... |