 He has been prominent in community relations as trustee of the Jersey Community Relations Trust and member of the Jersey Holocaust Memorial Day Committee.He is also the author of two books on the Occupation of the Channel Islands and the history of Channel Island Silver, managed the new official history of the Occupation by Paul Sanders, organised the La Hougue Bie Slaveworker Memorial, and commissioned, fundraised and managed "The Ultimate Sacrifice" – the chronicle of Islanders who perished in concentration camps.Cohen held elected office between 2005 and 2011.