Doug – or Uncle Doug, as he is commonly and lovingly known – began his career at a small country station in Armidale after completing a broadcasting course at the Digamae Radio School run by the man later credited as being the father of Australian FM radio, Rod Muir. From Armidale, Doug worked his way south, securing a spot with Central Coast station 2GO Gosford. During the mid-1970s he worked for 3AW Melbourne, hosting
Mulray & The Man. In the late 1970s, Doug started a permanent job in Sydney with the ABC’s alternative rock station, 2JJ (later Triple J), where he rapidly built up a sizeable following. It wasn’t long before Doug was poached by a new station, Triple M, in 1982, founded by his former mentor, Rod Muir.
Doug hosted the breakfast time slot on Sydney FM radio station 2MMM (Triple M) in the 1980s and enjoyed considerable success, growing the show from a ratings share (GfK) of 2.6 up to over 18 at one stage, a rating higher than even the traditionally dominant AM stations.
Outside of radio, Doug recorded numerous comedy records, including I’m A Punk, which shared Number One in the NSW charts with The Rolling Stones Start Me Up in 1982. His song You Are Soul reached 34 in the ARIA Singles chart despite being banned from broadcast. Doug also featured on Australian TV shows such as Mulray, and Beauty and the Beast. In 1992, Doug hosted the infamous Australia's Naughtiest Home Videos. In 2014, Radio Today rated Doug Mulray’s show on Triple M Sydney as the third best Australian metro FM breakfast show of all time.