He finished 8th on the money list in the 2008 season to gain his Professional Golf Association Tour card for the 2009 season.
Chalmers turned professional in 1995 and made a strong start to his professional career, winning four times in Australia in the next few years, including the 1998 Australian Open. Chalmers" best Professional Golf Association Tour finish is second at the 2000 Kemper Insurance Open and at the 2009 Buick Open. Chalmers struggled in 2006, making only 8 cuts and did not maintain his status and played on the Nationwide Tour during 2007 and 2008.
He held off late charges by John Senden and Tiger Woods to claim victory.
He defeated Robert Allenby and Marcus Fraser in a sudden death playoff to take the title. He also became only the second player to have a chance of winning the Australian "triple-crown" but could not claim the Australian Masters title, an event that still eludes him.
He came from seven strokes back during the final round after a flawless round of 64 to enter a playoff with Wade Ormsby and Adam Scott on 11 under. In a marathon playoff which was the longest in tournament history, Ormsby was eliminated at the third extra hole, with Chalmers and Scott going as far as seven extra holes.
On the seventh estra hole, Scott three putted from 30 feet for bogey to allow Chalmers to take the victory.
This was his fifth title on the Professional Golf Association Tour of Australasia and tenth overall professional level victory. He also claimed the year end title for the second time his career. 1993 Australian Amateur Professional Golf Association Tour of Australasia wins (5) Nationwide Tour wins (2) Challenge Tour wins (1) Other wins (2) DNP = Did not play CUT = missed the half-way cut "T" = tied Yellow background for top-10.
Amateur Eisenhower Trophy (representing Australia): 1994.