Dr Girdis graduated in 1943, as School Captain.
Dr Girdis helped to reshape and preserve Brisbane's waterfront in the 1990s by turning a run-down ship-building area into the Dockside Precinct, Kangaroo Point.
He was also involved in the development of Fisherman's Wharf at Main Beach.
He led the campaign to raise $5 million for the restoration of the historic Customs House for The University of Queensland, and developed a 480 berth marina for the Royal Queensland Yacht Squadron.
Today, Dr Girdis runs his own property investment and development firm, which has been involved in one of the largest office building portfolios in the centre of Brisbane.