Simpson would serve in the United States Navy during World War II, participating in the Pacific Theater.

[8] Simpson continued his service in the Navy Reserves for 25 years, ultimately retiring as a commander.

[4]Simpson would work as a real estate and mortgage broker, including roles in life and general insurance, building products sales, home improvement construction, and advertising.

[4] Simpson served extensively with the Jacksonville Jaycees, serving as the State Vice President for District 3 from 1952 to 1953, and was elected as president of the Jacksonville Junior Chamber of Commerce in 1954.

[4] Simpson died in Belleair, Florida due to complications from Alzheimer's disease on November 14, 1999, at the age of 79.