David Gerard (Davy) Sims (born 27 January 1956) is a broadcaster, writer and communications consultant from Northern Ireland. He lives in Holywood, County Down was educated St. Patrick's College, Knock.
From February 2001 to August 2008 he was head of New Media in BBC Northern Ireland. In 2007 was a founding member of Digital Circle – the representative body for the digital content industry in Northern Ireland - and its Chair in 2009/2010. He had been a member of the board of Momentum the representative body for the ICT industry in Northern Ireland and is a member of the board of the charity Achieve Enterprises.
He has been Head of Social Media at the Northern Ireland charity Public Achievement since January 2011 and runs the WIMPS (Where Is My Public Servant?) project.
He lives in Holywood with wife Dawn. He has two sons Adam and Owen.
His broadcasting career began in February 1979 in Downtown Radio where he established himself as a supporter of the punk and post-punk music from Northern Ireland as well as a pioneering DJ highlighting new and emerging music, playing local indie music releases, giving new bands radio sessions and interviews.
Joining BBC Northern Ireland in April 1986 he launched the Radio Ulster programme The Bottom Line (later renamed Across the Line) which he produced. He presented the programme once a week. The main presenter was Mike Edgar former drummer of Cruella de Ville. The programme's other presenters were Michael Bradley (musician), former bassist with The Undertones and journalist Barry McIlheney.