Martin Edward Thomas, who writes under the name Martin Thomas, was educated at the University of Sydney, graduating with BA Hons in History in 1988. In 1995 he commenced doctoral research at the University of Technology, Sydney (UTS) where he subsequently worked as a postdoctoral fellow. Since 1988, Thomas has been practising as an essayist, critic and writer/producer for radio. He also lectures and writes about contemporary visual art. His work is often interdisciplinary; much of it concerns landscape history, philosophy of place and the impact of colonisation. He was a writer in residence at the Cité Internationale des Arts, Paris in 2001 and a Harold White Fellow at the National Library of Australia, Canberra in 2002, later becoming a Research Fellow in History at the University of Sydney. In 2011, he was working as an ARC future Fellow at the Australian National University.
Thomas is the author of The Artificial Horizon (2003), an innovative study of the Blue Mountains as a cultural imaginary. While working as an historian for the National Parks & Wildlife Service of NSW in 2000, he wrote A Multicultural Landscape (2001), a study of migrants' perceptions of the Australian bush.
Among his many works for radio are two award-winning programs on the Aboriginal story teller and sound recordist Jimmie Barker: This Is Jimmie Barker (2000) and I Love You Jimmie (2001).These were joint winners of the inaugural Best Moving Portrait Documentary Awards presented at the Woodford Festival, and This Is Jimmie Barker won the New South Wales Premier's Audio/Visual History Prize, 2000.
In 2018, Thomas was announced as the Keith Cameron Chair in Australian history at University College Dublin.