Mark began his radio career at RTE, the Irish state broadcaster, then moved to Capital Radio in 1983 as Breakfast Show Producer where he helped devise and produced the long-running Chris Tarrant Breakfast Show. In 1989 he joined Radio One producing Simon Mayo's Breakfast Show.
In 1990 he was appointed Programme Director of Piccadilly, taking Key 103 from 5th to 1st in the market. He was appointed Group Programme Director of Emap Radio until 1995 when he left to join Virgin Radio but returned to Emap three years later, successfully launching Magic 105.4 and revamping Kiss 100.
He was MD of Kiss and Magic 105.4 until the end of 2004 when he was promoted to overseeing all Emap radio programming. In this role he launched Emap’s market leading digital radio and TV services.
He is a regular contributor to radio industry activities and has consistently been a judge for the Sony Awards and Irish Radio's PPI Radio Awards.
He was elected a Fellow of The Radio Academy in 1998 and is a recipient of the John Peel Award for outstanding contribution to Music Radio.
Mark established his own international Radio Consultancy in 2009 with clients in UK, Ireland, France, Germany, India, Jordan, Serbia, Bulgaria and Poland.
In 2010 he was elected as a trustee of The Radio Academy and appointed chair of the annual Radio Academy Production Awards