In 2014, McMullen appeared as himself in the second episode of Black Comedy, an Australian sketch show, in a mockumentary about an indigenous boy "tragically born without any sporting ability".
[5] McMullen was a director of AIME for 15 years,[6] helping to grow Jack Manning Bancroft's education movement connecting university undergraduates as mentors for Aboriginal high-school students in urban areas.
In 2015, Gurindji elders invited McMullen to deliver the annual Vincent Lingiari Oration at Charles Darwin University, honouring those who led the ongoing struggle for Aboriginal land rights.
[citation needed] At prime minister Kevin Rudd's 2020 Summit, McMullen was among the 100 people focussed on "Closing the Gap" in Indigenous life expectancy, and improving the well-being of Aboriginal communities.
[16] McMullen is the author of a number of books, including: He has written extensively in academic journals on Indigenous rights, development and education, and contributed regular columns to The Tracker Magazine, as well as feature articles in Arena, Australian Doctor and the Griffith Review.