MG(Ret) Singlaub attended flight school at Fort Rucker as a 55-year-old Brigadier General. Helicopter use in Special Forces operations was increasing, so he felt he needed a better understanding of their use and employment.
MG (Ret.) Singlaub served as the Chief of Staff, United Nations Command, United States Forces, Korea, and the Eighth U.S. Army in Seoul, Korea, while also serving as the U.N. Command Senior Military Member of the Military Armistice Commission at Panmunjom.
In addition to his wartime command positions, MG(Ret) Singlaub played a significant role in the creation of the Ranger Training Center at Fort Benning, Georgia. He helped establish the Modern Army Selected Systems Test, Evaluation and Review activity at Fort Hood, Texas. He was responsible for training and combat-readiness of the Army Reserve and Army National Guard Units in a ten-state area. He also served as the Deputy Assistant Secretary of Defense for Drug and Alcohol Abuse..