Society of Jesus | Royal Society | National Geographic Society | United Artists | Animal Planet | American Cancer Society | Royal Television Society | American Physical Society | American Chemical Society | International Society for Krishna Consciousness | American Society of Civil Engineers | Royal Society of Canada | Royal Geographical Society | American Philosophical Society | Theosophical Society | Royal Society of Edinburgh | Society of Antiquaries of London | Society of the Cincinnati | Society for the Prevention of Cruelty to Animals | Justice Society of America | American Mathematical Society | Royal Aeronautical Society | National Honor Society | Black Label Society | Students for a Democratic Society | Animal House | society | Royal Society of Arts | artists | Animal Farm |
As an avid naturalist, Brent is a member of the Society of Animal Artists and has created sculptures of numerous of birds and mammals; some of these are large bronze sculptures which he has donated for his young patients and other children to enjoy in the San Diego Zoo and San Francisco Zoo.