Hill International, Inc. announced that Mark Rynning, PE, has joined the firm as Chief Operating Officer. Rynning comes to Hill following more than three decades with Tetra Tech, Inc. where he led the Resilient, Sustainable Infrastructure (RSI) Division. Under Rynning?s leadership, the RSI Division performed design and construction management services for federal, state, local, and private owners in the water/wastewater, transportation, and high-performance building sectors in the United States, United Kingdom, and Australia.

Rynning began his career as a design engineer, rising through the ranks to become a project manager, client manager, operation leader, and business unit leader before assuming the Division President role at Tetra Tech. As Hill?s COO, Mark will report to Hill Chief Executive Officer Raouf S. Ghali and oversee Hill?s operations around the world. Rynning holds Bachelor of Civil Engineering and Master of Business Administration degrees from the University of Florida and is a registered Professional Engineer in Florida.