He married Marjorie Emory Simpson, a graduate of the Rinehart School of Sculpture, with her, in 1936, he designed the Norfolk, Virginia, Bicentennial half dollar.[6][7][8]
During World War II Simpson volunteered for service and served with the Army in the Pacific from 1942 until 1946. While in the service he designed two decorative grille-works for the entrance at the Army headquarters building at Honolulu and at Guadalcanal American Memorial. He was awarded the Army Commendation Medal for his designs.[10]
He taught at the Virginia Military Institute from 1953-1956.
^Downing, Sarah (2015). On This Day in Norfolk, Virginia History. Mount Pleasant, South Carolina: Arcadia Publishing. p. 90. ISBN978-1-626-19703-9. Retrieved April 27, 2023. The Seventy-fifth Congress authorized the minting of a silver half-dollar to mark both the 300th anniversary of the Norfolk land grant as well as the 250th anniversary of the founding of the Borough of Norfolk [...] The half-dollar was designed by artist William Marks Simpson.
^Yeoman, Richard S (1976). A Guide Book of United States Coins. Western Publishing Company. p. 204. William Marks Simpson and his wife, Marjorie Emory Simpson, designed the piece
^Parramore, Thomas C. (2000). Norfolk: The First Four Centuries. Charlottesville: University of Virginia Press. p. 325. ISBN978-0-813-91988-1. Retrieved April 27, 2023. Sculptor William Marks Simpson Jr., a Norfolk native, was in 1930 awarded the Prix de Rome, one of the most coveted prizes in the plastic arts.