Owner, operator photographic manufacturing firms, pharmaceutical manufacturing plant, various technical laboratories and optical manufacturing concerns. Founder, president, Bleitz Wildlife Foundation, from 1952; Member faculty training program, Veterinary Medicine Commercial, Pet, and Wild Birds. Member of advisory board Reys Bird Observatory, San Francisco Bay Bird Observatory.
Member Los Angeles County Museum. President San Pedro Heart Foundation. Board directors Hollywood Chorale, Hollywood Heritage.
Fellow Explorers Club, Cleveland Zoological Society. Member National Audubon Society (life), Cooper Ornithological Society (life), Wilson Ornithological Club (life), American Ornithologists Union (elective life member), California, Southern California academies science, International Society Bird Protection, Western Bird Banding Association (life), Eastern Bird Banding Association, Inland Bird Banding Association, League of Americas (board directors, president), Hancock Park Art Council, American Association for the Advancement of Science, Los Angeles Heart Institute, Lepidopterists Society, American Society Mammologists, Philadelphia Zoological Society (honorary life), Bromeliad Society, San Diego Zoological Society, American Orchid Society, Malibu Orchid Society, Windsor Square-Hancock Park History Society (trustee, founding member), New York Academy of Sciences, American Society Naturalists, Avicultural Society, Pacific Horticultural Society Clubs: Thunderbird Country, Los Angeles (founder, president, director), Los Angeles Men's Garden (elective life member, founder, president, director).