He was killed in a non-combat accident while serving in England as part of Eighth Air Force. He was a graduate of the University of Chicago, receiving a law degree and a Certified Public Accountants. Seerley joined the Air Service, United States Army in 1917 during World War I. In combat over the Western Front in France, Lieutenant Seerley was credited with shares in five victories. with the 13th Aeronautical Squadron. After the war, Seerley started his own investment company in Chicago.
During World World War II, he re-entered the military, joining the United States Army Air Forces, serving as an air intelligence officer
Major Seerley was killed in a vehicle accident in Tetsworth, Oxfordshire, England. He was buried at Cambridge American Cemetery and Memorial, Cambridge, England.