He was awarded a scholarship to the Australian Institute of Sport in 2001, and in 2002 was recruited by a number of American colleges and accepted a scholarship from Boise State, where he roomed with Coby Karl (son of George Karl) for his entire stay at the university.
Davidson never appeared in a game during his time at Boise State. Davidson started his pro career in the NBL with the Hunter Pirates in the 2004, playing with them until 2006. When the Pirates re-located from Newcastle to Singapore to become the Singapore Slingers, Davidson moved with them for the 2006-2007 season before returning to Australia and signing with his current club, the Wollongong Hawks.
On 7 December 2012, Davidson copped a knee in the chest from Perth Wildcats" centre Michael Dunigan, cracking ribs and sidelining him for four weeks.
Davidson has played 237 NBL games averaging 8.1ppg, 5.8rpg, and 1.2apg. On 13 May 2013, Davidson re-signed with the Hawks for the 2013-2014 season.
On 23 January 2014, he played his 250th NBL game. On 4 July 2014, Davidson re-signed with the Hawks for the 2014-2015 season.
On 9 July 2015, Davidson re-signed with the renamed Illawarra Hawks for the 2015-2016 season.
Davidson comes from a family with a strong sporting history.
Davidson led the NSW team to victory in 2001 at the National U20 championships and was awarded the Bob Staunton Medal as tournament Most Valuable Player. Davidson was named a member of the Australian Boomers squad for the 2006 Commonwealth Games but injury prevented him from playing with the gold medal team His grandfather Jack Gilbert was in the first Street George team to win a premiership.
