He served in both world wars, bombing Germany, as a B-17 Flying Fortress co-pilot with the 486th Bombardment Group. After the Second World War, he operated a charter business in South America. He was married to Crystine Francis Malstrom, a stage actress who appeared in Abie's Irish Rose. He was the author of several books, including Squadron of Death, Crash Pilot, I am still alive, and Visibility Unlimited. Grace was one of the few stunt pilots who died of old age.