Simmons became one of the first programmers at the United States Steel Corporation when it installed a UNIVAC I in 1954. He became active in the company's efforts to standardize its programming efforts at its various divisions. Simmons was active in various capacities in CODASYL starting in 1960. He served on the Executive Committee as secretary, as well as chairman of the Planning Committee and the List Processing Task Force, which later became the Data Base Task Group.
From the guide to the Warren G. Simmons papers., 1953-2002, (University of Minnesota Libraries. Charles Babbage Institute. [cbi])