After the election of Dimitris Christofias as President of the Republic of Cyprus on 24 February 2008, the position of the President of the House of Representatives remained vacant until Garoyian's election to the post on 6 March 2008 by the members of the House.

He was also president of the District Committee of the Youth Organisation of DIKO (NEDIK) in Nicosia and secretary of Unionism of the Labour Department of the party.

He was director of the Press Office of the President of the Republic Tassos Papadopoulos and Deputy Government Spokesman from 2003 to 2006.

As an international and a political analyst he appears regularly in Cypriot and Greek media.

The Hellenic Republic has awarded him the cross of the Grand Commander of the Order of Honour.