In 1989, Russ became President of Conservation International, a position that he held for 25 years, switching to Executive Vice-Chair in 2014. At CI, he was the key figure in adapting Norman Myers' Biodiversity Hotspots concept as a core strategy for that organization for the next two decades, with hugely successful fundraising results. From Myers' original 10 hotspots, and then later 18, Russ and colleagues carried out research that eventually increased the number to 36. Russ also created the concepts of Megadiversity Countries and High Biodiversity Wilderness Areas as additional strategies for priority-setting, and also worked with several colleagues to adapt these and the Hotspots for turtle priority-setting as well. In addition, Russ has had a long history with IUCN. He has served as Chair of the IUCN Primate Specialist Group since 1977, and in 1979 began a process with Ed Moll and Peter Pritchard that resulted in the creation of the IUCN Freshwater Chelonian Specialist Group in 1981. He served as that new group's first Vice Chair under Ed Moll and has been on the Executive Committee of the combined IUCN Tortoise and Freshwater Turtle Specialist Group ever since, as well as a long-time and current Board member of Turtle Survival Alliance, Turtle Conservancy, Turtle Conservation Fund, and Chelonian Research Foundation. He was also present at the creation of the TSA in Fort Worth back in 2001. Other IUCN positions include the Steering Committee of the Species Survival Commission since 1982 and the IUCN Council from 2004 to 2012, and he was an IUCN Vice-President from 2008-2012. In December, 2017, Russ moved to Global Wildlife Conservation to work with Wes Sechrest and Don Church, and is currently that organization's Chief Conservation Officer. His work there, as it has for the past 50 years, focuses heavily on tropical forests and primates, with a strong side interest in turtles, working with last year's Behler Award winner Peter Paul van Dijk, now at GWC as well.