As Chairman of Publicis Groupe Media, Jack Klues sits atop two of the most powerful media services networks in the world—Starcom MediaVest Group (SMG) and ZenithOptimedia (ZO). He is also a member of Publicis Groupe Directoire, the elite governing body that guides his organization's parent company, Publicis Groupe S.A. Through the combination of these two roles, he is given wide powers to act in the name of Publicis Groupe and is considered one of the most influential executives in the industry today.

Prior to running one of the world's largest brand communication powerhouses, Jack Klues helped found Starcom MediaVest Group in 2000 and quickly led the network to a market-leading position as its Chief Executive Officer.  Among the first to recognize how the fast-changing worlds of media and technology would forever alter the marketing landscape, Klues invested early in a broad spectrum of niche services at SMG that have since become the industry standard. His vision led to the formation of such diversified services as Relay Sponsorship and Events Marketing, Tapestry (multicultural), Halogen Direct Marketing, SMG Entertainment, SMG IP (Internet) and SMG Directory Marketing.