Colonel William F. Vernau was commissioned an Infantry Officer upon graduation from Officer Candidate School, Class 52-53, 20 May 1953. His first duty assignment was as Intercept Officer, 330th Communications Reconnaissance Company, Republic of Korea. | His subsequent duty assignments include: Operations Officer, 329th Communications Company, Republic of Korea; Analysis Officer, 3rd U.S. Army Security Agency Field Station, Sobe, Okinawa; Analysis Officer, National Security Agency, Fort Meade, Maryland; War Plans Officer, Headquarters, U.S. Army Security Agency, Pacific, Helemano, Hawaii; S-3, 9th U.S. Army Security Agency Field Station, Clark Air Force Base Philippines; Commanding Officer, 51st Special Operations Command, Sobe, Okinawa; Staff Officer, USA Combat Developments Command, Fort Belvoir, Virginia; Commanding Officer, 311th U.S. Army Security Agency Battalion, Fort Walters, Texas; Commanding Officer, Two ROCK Ranch Station Petaluma, California; Staff Officer, J2, Headquarters, U.S. Army, MACV, Republic of Vietnam; Executive Officer, Headquarters, USASA, Europe, Frankfurt, Germany; Chief, Readiness Command, Headquarters, USASA, Arlington, Virginia; Commanding Officer, 3rd U.S. Army Security Agency Field Station, Sobe, Okinawa; D.C.S Operations, Headquarters, U.S. Army Security Agency, Arlington, Virginia.