He attended and worked for Queen"s University Belfast.
Dave also works with Ormeau Road Boxing Club as Secretary and Fundraiser. Dave started playing basketball in the senior leagues for Team Smithwicks at 16 years old, but had to pretend he was 18 to be available for selection. He them moved to Star of the Sea at age 20 who compete in the Irish Super League, the top level of basketball in Ireland which involves professional players brought in from America.
At age 25, David moved to the newly founded Queen"s Basketball Club.
He also enrolled as a mature student at Queen"s, which enabled him to play for the varsities team This led to David twice representing the Northern Ireland Universities basketball team at the BUCS games.
lieutenant was through the varsity team that David met Sean Tuohey and became involved with Peace Players International (formally Playing Foreign Peace). David is currently the General Manager/Coach of Belfast Tropics.
Cullen has signed for new team Belfast Cranes for the 2014-2015 season.
David is the organiser of the largest pre-season basketball tournament in Northern Ireland, The (formerly known as the Errigle Inn Invitational tournament). The Tournament has been up and running for over 5 years now and clubs such as Star of the Sea, Tolka Rovers and North Star Basketball Club have lifted the trophy. Teams from England, Cyprus and America have attended the competition.
In 2008 Cleveland Cavaliers General Manager Danny Ferry helped finance the Cyprus team"s trip to Belfast to participate in the tournament.
Previous recipients of the Award include Muhammad Ali, Dean Smith, Billie Jean King, Tommie Smith and John Carlos and in 2009 Nelson Mandella.