AECOM is an infrastructure consulting firm headquartered in Dallas, Texas, formed in 1990 through a management buyout of five business units from Ashland Oil. It provides planning, design, engineering, program management and construction management across transportation, water, environment, energy and buildings, and it ranks consistently among the largest design firms in the United States by revenue. The company works for public agencies and private owners in more than 150 countries, with U.S. work concentrated in transportation and water infrastructure. AECOM is leading program management, design and engineering on the Port of Seattle’s S Concourse Evolution at Seattle-Tacoma International Airport, a $2.5 billion renovation that adds a second passenger level to the airport’s principal international concourse.
AECOM describes itself in terms of the project lifecycle rather than a trade: planners, designers, engineers, consultants and program and construction managers working across cities, transportation, buildings, water, new energy and the environment. The six service lines it puts forward are advisory, architecture and design, construction management, engineering, environmental services and program management. Market pages are organised around cities, energy, transportation, water, healthcare and national governments.
The company’s own account of its origins is that it was formed by the merger of five entities, with an official founding in 1990, though several predecessor firms had histories going back more than 120 years. More than 50 companies have joined since. It listed on the New York Stock Exchange in 2007.
The published fast facts are worth reading as stated. Revenue was 16.1 billion dollars in fiscal 2024. Engineering News-Record named it the world’s top design firm in 2025 and ranked it first in general building, transportation and water. Fortune has included it among the World’s Most Admired Companies for eleven consecutive years, and it sits at number 259 on the Fortune 500. Ethisphere named it one of the 2026 World’s Most Ethical Companies.
The office structure is a useful reference point for anyone trying to reach the right team. The global headquarters is at 13355 Noel Road, Suite 400 in Dallas. The Americas are also served from 300 South Grand in Los Angeles and from AECOM Canada in Markham, Ontario. Europe runs through Aldgate Tower in London. Middle East operations work from International Tower at Capital Gate in Abu Dhabi and a regional headquarters at The Business Gate in Riyadh. Asia is headquartered in Kowloon, Hong Kong, with a Singapore office on Beach Road. Australia and New Zealand are covered from Fortitude Valley in Brisbane, and India from DLF Cyber City in Gurugram. Beyond those, the site maintains localised pages for more than forty countries.
Named projects the company chooses to lead with include One World Trade Center, the Intuit Dome, the Port of Los Angeles Waterfront, Mercedes-Benz Stadium, Golden 1 Center and Warner Bros. World Abu Dhabi. Public-facing material for contractors sits under contract vehicles and supply chain pages.
