John Walker was laid down on 1 June 1942, under a Maritime Commission (MARCOM) contract, MCE hull 305, by the Bethlehem-Fairfield Shipyard, Baltimore, Maryland; she was sponsored by Mrs. Arthur J. Williams, the wife of the assistant secretary for MARCOM, and was launched on 22 July 1942.[1][2]
Maritime Administration. "John Walker". Ship History Database Vessel Status Card. U.S. Department of Transportation, Maritime Administration. Retrieved 5 March 2020.