He will manage sales revenue across Digicom's outdoor contracts, which partly comprise Sir Alan Sugar's Amscreen outdoor business.
Forrester will set revenue targets, manage the eight-strong sales and marketing team and present Digicom's portfolio to advertisers, agencies and specialists. He will take a seat on the Digicom board and report to Goddard, who is executive chairman.
At CBS Outdoor, the team of four heads of sales, who report to national sales director, Peter Charlton, will assume Forrester's responsibilities.
Earlier this month, Media Week revealed Digicom had signed up Sugar's digital signage outfit, Amscreen, as its first client.