John Dionisio

John Dionisio

Vice Chairman

John’s Vice Chair’s principal GISI role is to share his experiences from building and overseeing a multi-billion-dollar global business; while introducing our partner companies to his global relationships and proven global strategies. He is committed to enabling GISI, its partner firms and their leadership to attain their potentials. As a founding shareholder of AECOM and co-founder of GISI, John embraces the importance of management and employee ownership as a key for having our partner firms’ strategic interests aligned.

John brings a truly distinguished record in business- and value-building, is a touchstone for global expansion by creating a culture of excellence for clients and co-workers.

Climbing the ranks from engineering manager at PRC Harris to president, CEO and executive chairman of AECOM, which tripled its revenue to $10 billion and doubled its workforce, while expanding its service offerings and geographic reach under his leadership. Previously, he was president and CEO of DMJM Harris, and president and CEO of Frederick R Harris.

John’s professional affiliations include Registered Professional Engineer; National Society of Professional Engineers; New York State Society of Professional Engineers; Distinguished Member, American Society of Civil Engineers; American Council of Engineering Companies; National Academy of Construction; Society of American Military Engineers; American Public Transportation Association; Concrete Industry Foundation; New York Building Congress; New York Building Foundation; and New Jersey Alliance for Action.

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