Williams will also be tasked with developing key client relationships to help the agency grow and generating new business by using his expertise in the drinks and sports sectors.
He joins Space from Publicis Group where he was global business director, heading up the Beam Global Spirits and Wine account for four years.
Prior to Publicis, Williams worked at 141 Worldwide, where he handled the Allied Domecq and CCS Stellar business.
David Atkinson, managing partner at Space, said: "We are very pleased to have appointed someone of Gerry's calibre, whose skill sets and expertise will really help drive the agency to the next level and meet our ambitious targets for growth.
"His background and experience perfectly match the sectors we intend to target to continue our strong progress."