He soon became a specialist trainee at Four Corners, Monday Conference, AM and PM, then moved to ABC Radio's Science Unit where in 1977 he produced an award winning series on asbestos.
A radio career followed which took Peacock to Washington and New York, reporting for the ABC's AM, PM, The World Today and Background Briefing programs.
From 1997 - 2000 Matt Peacock was chief political correspondent for ABC Radio's current affairs Canberra bureau, and was subsequently posted to London, where he won the Foreign Press Association's 2003 award for best story by a locally based foreign correspondent.
Since 2004 Peacock has been a senior reporter with ABC TV's 7.30 Report. he has written for a number of newspapers, magazines and journals and has previously published two books based on his radio programs: Asbestos: Work as a Health Hazard and The Forgotten People - A History of the Australian South Sea Islander Community.
Peacock lives in Sydney with his family.