John M. Dionisio leads AECOM (NYSE: ACM), a $6-billion global provider of professional technical and management support services. AECOM’s 47,000 employees – including architects, engineers, designers, planners, scientists and management professionals – serve clients in more than 100 countries around the world.

Prior to being appointed to his current role in 2005, he served as Executive Vice President and Chief Operating Officer, and earlier as the Chief Executive Officer and President of AECOM legacy operating company DMJM Harris.

Under Mr. Dionisio’s leadership as CEO, AECOM has tripled its revenue and doubled its workforce, while considerably expanding its service offerings and geographic reach. During 2007, Mr. Dionisio oversaw the company’s initial public offering (IPO) on the New York Stock Exchange (NYSE), which was one of the 10 largest NYSE listings for 2007, and one of the largest engineering industry IPOs of all time.

During Mr. Dionisio’s 35-plus-year career at AECOM, his leadership has also helped advance the company’s transportation and energy infrastructure business in the Americas. Mr. Dionisio oversaw the combination of three AECOM business units – Frederic R. Harris, DMJM Infrastructure, and Holmes & Narver Infrastructure – to form DMJM Harris in 2000.

While heading DMJM Harris, Mr. Dionisio was involved in the advancement of many notable projects. These include the Second Avenue Subway in New York, Tren Urbano transit rail system in San Juan, Puerto Rico, the State Highway 130 toll-way in Texas, Southern California’s Metrolink Commuter Rail System, and the new World Trade Center PATH Terminal in Lower Manhattan.

A Fortune 500 company, AECOM provides a blend of global reach, local knowledge, innovation, and technical excellence in delivering solutions that enhance and sustain the world’s built, natural and social environments. For more information, visit www.aecom.com.