The forum promotes the use of corporate identity as a business tool and brings together thinking from leading consultants.
It is edited by Tony Spaeth and other contributors include Joel Portugal, former vice-chairman of Landor Associates, and Brian Collins, chief creative officer of Collins.
Spaeth said: "Dan brings a genuine passion for corporate branding to the Identity Forum informed by senior-level experience working with a number of the world's best-regarded branding agencies, on both sides of the Atlantic."
Dimmock has worked for clients including Action for Children, Havas Media, Reuters, Smith & Nephew and Wyeth.