Covanta announced the appointment of Charles E. Clarke to the role of vice president, safety and health. Clarke comes to Covanta from Air Liquide, based in Houston, TX, where he was a Corporate Safety and Industrial Hygiene manager. At Covanta, he is tasked with setting the direction and driving continuous improvement of the company's safety and health programs, identifying leading and lagging indicators for new and existing operations, construction and capital projects. He reports to Michael J. de Castro, Covanta's Executive Vice President of Supply Chain. Mr. Clarke brings more than 25 years of safety, health and environmental excellence. In addition to Air Liquide, he has held various senior-level positions with Ascend Performance Materials, Rhone-Poulenc/Aventis and others, where he managed global teams specializing in world-class programs and performance.