John M. Dionisio joined Corinthian's board in April 2008. Mr. Dionisio, 59, is chairman and chief executive officer of AECOM Technology Corp., a NYSE-listed company that provides professional technical and management support services for its clients around the world. He previously served as president, and prior to that, executive vice president and chief operating officer for AECOM, which has approximately $4.2 billion in annual revenue and 35,000 employees serving clients in more than 60 countries. During his 36-year career with AECOM and its predecessor companies, Dionisio has held a number of senior management positions, including serving as president and chief executive officer of its DMJM Harris business. Dionisio earned a master of science degree in civil engineering from Polytechnic Institute of New York and a bachelor of science degree in civil engineering from The City College of New York.