Following high school, Erdman studied architecture at the University of Illinois at Urbana-Champaign.
He joined the United States Army Corps of Engineers in 1943, where he helped build the Remagen pontoon bridge.
An integrated healthcare design-build company, Marshall Erdman & Associates grew rapidly, expanding into six different markets throughout the U.S.
In early 2008, Marshall Erdman & Associates was purchased by Cogdell Spencer, a healthcare real estate investment trust, for $247 million.
In addition to founding Marshall Erdman & Associates, he introduced U-Form-It prefabricated house kits to the market in 1953 and Techline office furniture in 1969.