Birmingham have secured the signature of Brentford captain
Dean began his footballing career at Dagenham & Redbridge in 2008, spending time on loan with the likes of Bishop's Stortford, Thurrock, and Grays Athletic before earning a free transfer to Southampton.
Dean spent two years with Southampton where he returned to Bishop's Stortford on loan. In November 2011, the defender was loaned to Brentford before making the move permanent at the end of his contract with Southampton in 2012.
Dean went on to make 249 appearances for Brentford, scoring ten goals and assisting eight, becoming a real fan favourite during his time at Griffin Park.