John Roskam is the former executive director and now senior fellow of the Institute of Public Affairs (IPA), a libertarian think tank based in Melbourne, Australia.

[citation needed] He has also taught political theory at the University of Melbourne and held positions as Chief of Staff to Dr David Kemp, the Federal Minister for Employment, Education, Training and Youth Affairs, as Senior Advisor to Don Hayward, Victorian Minister for Education in the first Kennett Government, and as Manager of Government and Corporate Affairs for Rio Tinto Group.

[2] With Gary Johns he has worked for the IPA, including on a contract with the federal government, to develop proposals to limit the role of nongovernmental organisations on public policy.

[citation needed] Moran's sacking followed shortly after Roskam also stood down IPA research fellow Aaron Lane for satirical comments he had made years earlier on a micro-blogging site prior to employment with the organisation.

[citation needed] In April 2024, as a senior fellow, Roskam wrote an article in the AFR criticising the appointment of Sam Mostyn as governor-general of Australia.