Jaime Harnwell joined Perth Glory in 1998 from Western Australia State League side Sorrento FC and quickly joined the starting eighteen. In 2003 Harnwell had a one-month contract with Leyton Orient in Football League Two, which was not extended. He then played a game for Welling United at Southern Football League Premier Division. At the end of the 2003 English football season, Harnwell returned to Perth and rejoined the Perth Glory. After playing with the Glory in the 2003/2004 season of the National Soccer League, the NSL was disbanded, and Harnwell had the option to continue his career overseas in England. Harnwell played for Western AustralianState League club Sorrento FC with his younger brother Todd while he waited for the A-League to begin. Harnwell was named as team captain for the inaugural A-League season. Harnwell skippered the side until the 2007/08 season, when the captaincy was taken on by Simon Colosimo. During the 2006/07 A-League season, Glory coach Ron Smith used Harnwell in a striking capacity and Harnwell scored the opening goal in the 2–1 win over Newcastle Jets. On 26 November Harnwell netted the first hat-trick of the A-League season in the 4–1 win against the New Zealand Knights. On 28 December 2006, following a 0–0 draw with Adelaide United, Harnwell and Glory team mate Adrian Webster had an altercation, with the latter punching Harnwell. Both players were reprimanded by Perth Glory, fined half a week's wages and given a suspended one match ban. Against Adelaide in November 2007, Harnwell played his 200th game for the Glory, the third player to do so after Bobby Despotovski and Scott Miller. On 14 February 2008, Harnwell moved to Liechtenstein's only professional club, FC Vaduz, and signed a loan contract until the end of season. He played in the Swiss Challenge League. Harnwell was a part of the 2009/2010 squad that made the Hyundai A-League Finals for the first time in the club's history. The club announced that Harnwell had signed on for the 2010/11 season in April 2010, On 3 October 2010, Harnwell broke Bobby Despotovski's record of 241 appearances for Perth Glory to become the most capped player of all time.
Retirement
Harnwell retired from professional football after making a record 256 appearances for Perth Glory.
