He started to work at Krieder-Reisner Naval Aircraft factory in Maryland. He then proceeded to work at B/J Aeronautics Corp. (the predecessor to North American). From 1936-1945, Renison worked at Consolidated Vultee Aircraft Corp. in San Diego as an Assistant Division Manager, where he handled cost estimating, production control, and executive administration. He left Consolidated Vultee in 1945, and became the Chief Production Engineer for General Tire & Rubber. Renison moved on to work at the Alameda Naval Air Station (NAS) as an industrial management engineer. Following his graduation in the Naval Dept. Work Improvement Program Supervisor Training course, Renison became a General Superintendent of Aircraft shops at McClellan Airforce Base. Renison quickly left McClellan to join Hiller Helicopters in the private sector, where he supervised the production systems for the helicopters. By the end of 1953, Renison joined Northrop Aircraft INC. at the Palmdale facility, where he coordinated the enter Palmdale project, and helped develop the first F-89 Scorpion fighter jets to the USAF.

He was married with three children.