Staff architect General Electric Company, Nela Park, Cleveland, 1955-1964. Principal John Flynn, Architect and Cons., Cleveland, 1964-1973. Professor archaeology Kent (Ohio) State University, 1967-1973.
Professor architectural engineering Pennsylvania State University, 1973-1980.
Served with United States Army, 1953-1955. Fellow Illuminating Engineering Society (director 1974-1980, senior vice president 1978, president 1979-1980), International Association Lighting Designers. Member American Institute of Architects, International Commission Illumination (international Chairman of Commission), Inter-Society Color Council, Tau Sigma Delta, Alpha Rho Chi.