Jason David O'Halloran (born 28 February 1972 in Lower Hutt, New Zealand) is an All Black cap and rugby union coach. He is now the Assistant Coach at Suntory Sungoliath. He was the Assistant Coach of Glasgow Warriors. Before that he was an Assistant coach to the Scotland national team. O'Halloran is the grandson of Wellington representative player of the 1930s, Con, was a product of the Petone club. He gained national honours at under 17 and under 19 levels but missed out on the Colts.