Duke has been involved with several cactus & succulent clubs and is a life member of three. He became a Director for the Cactus & Succulent Society of America (CSSA) in 1990, served as the CSSA’s Show Chairman for more than a decade, and as Convention Chairman for six conventions. He served as Vice President and then President for a total of almost ten years, and as Editor of the Cactus & Succulent Journal (CSJ) for just over a year. He has been the author of the long running CSJ column, Superb Succulents, since its inception; that column remains popular today. He enjoys flora and fauna, traveling, exploring, photography, and sharing these experiences with others of similar interests.