The firm currently employs 475 in 7 locations and three countries – and has designed buildings in all of the 50 states and in 20 countries. In the 2007 fiscal year the firm had an annual revenue of $70 million.
The company originally called Ellerbe & Co. was founded by Franklin Ellerbe in 1909 in St. Paul, Minnesota. Its first clients included the Mayo Clinic and 3M. Thomas Ellerbe took over the company in 1921 upon his father's death. When he retired in 1966 it became an employee-owned company. In 1987 it merged with Welton Becket and Associates of Los Angeles and became Ellerbe Becket. In 1988 it opened a sports design division in Kansas City. On October 26, 2009 Ellerbe Becket joined the architecture, planning, and engineering firm AECOM. Ellerbe Becket’s professional expertise and practice strengths in the design of healthcare, sports, government, corporate and higher education facilities complement the global AECOM platform.