Dexter was born in South Africa but holds a British passport and was a late-season signing for Kent in 2005.
He had been playing as overseas professional for Sudbury CC and had just returned to South Africa for his 21st birthday party when he was unexpectedly called up by Kent.
He made his debut in the crucial championship clash with Nottinghamshire at Canterbury, which Kent needed to win to keep their title hopes alive, and hit an unbeaten 79 in the first innings.
He also dismissed Australian opener David Hussey with the first ball of the second innings but he could not prevent a 214-run defeat which saw Notts clinch the title.
In his two championship appearances and two totesport League games he did enough to earn a staff contract for 2006 and 2007 and is now an integral part of the Kent side.
He was fourth in the county's championship batting averages in 2007, with 350 runs at 43.75.
The following season saw mixed fortunes for Dexter, including a loan spell at Essex. He turned down a three-year contract with Kent in September instead opting to leave the club.
Dexter joined Middlesex on a two-year contract in time to play in the inaugural Stanford Super Series which the Crusaders had qualified for by winning the 2008 Twenty20 Cup.
He scored two hundreds in the LV= County Championship in 2009 as he reached 709 runs from 19 innings at an average of 41, however Middlesex struggled despite his best efforts.
In one-day cricket he also performed well, scoring three half-centuries in nine innings in the Friends Provident Trophy as well as hitting a solitary fifty in the Twenty20 Cup.