Grant is a promising all-rounder, bowling right-arm medium pace.
He is a product of Glamorgan's second XI from where he will be hoping to stake his claim for a regular spot in the first team.
He had played two limited-overs games for Glamorgan before the 2005 season, but was promoted to first class cricket in the season which saw the county be relegated to Division Two of the County Championship.
Grant played a more prominent role in 2006 as the county suffered a spate of injuries towards the end of the season.
He remained a fringe player for much of the 2007 and 2008 seasons.