Bachelor of Science in Mechanical Engineering, Bradley University, Peoria, Illinois, 1965. Master of Science in Metallurgical Engineering, University Illinois, 1967. Doctor of Philosophy in Metallurgical Engineering, Ohio State University, 1976.
Research metallurgist, Battelle Memorial Institute, Columbus, Ohio., 1966-1972; graduate research associate, Ohio State University, Columbus, 1972-1976; research associate, Owens-Corning Fibrglas, Granville, Ohio., 1976-1987; vice president, Gelles laboratories, Inc., Columbus, since 1987.
Member American Society for Microbiology (chairman Columbus chapter 1991-1992).
Married Karla L. Roehrig.