国际世界语协会
Enderby held a number of community positions throughout his career, including presiding over the regional society for voluntary euthanasia. Additionally, after learning Esperanto in 1987, Enderby became involved in Esperanto organisations, including serving as President of the Australian Esperanto Association from 1992 to 1997, as a committee member of the World Esperanto Association from 1992 to 2004, as President of the Esperanto Law Association from 1996 to 2002 and from 1998 to 2001 as President of the World Esperanto Association.