For the 2011 and 2012 season the Hove-based ground, the oldest in the country dating back to 1839, will be renamed 'The Probiz County Ground'.
The deal can be extended for a further two years and Probiz will also receive the naming rights to the ground's new media centre.
Probiz's current presence in sport sponsorship includes commercial deals with West Bromwich Albion football club and rugby league sides Castleford Tigers and Halifax RFC.
Naming rights deals for English cricket grounds are nothing new, as cash-strapped counties look to drive up revenues.
Last year, Durham agreed a six-year deal which resulted in the Riverside becoming the Emirates Durham International Cricket Ground.
Surrey's Oval ground has been sponsored by Foster's and Brit Insurance in the past and is now known as the Kia Oval.
Lancashire County Cricket Club (LCCC) has announced that it is looking to sell the naming rights to its Old Trafford cricket ground.
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