Tim Castree

Tim Castree is a senior marketing and media executive with a career spanning agency leadership, media investment, and brand strategy. He is currently Chief Marketing Officer at DoorDash, the leading food delivery and local commerce platform in the United States, where he oversees the company's global marketing function. Castree spent a significant portion of his career at GroupM, the world's largest media investment group, where he rose to become CEO of GroupM North America. In that role he led one of the most influential media buying and planning operations in the industry, overseeing agencies including Mindshare, MediaCom, Wavemaker, and Essence across the region. He was a prominent voice on media accountability, data-driven investment, and the evolving relationship between brands and media owners. Prior to his GroupM tenure, Castree held senior roles at Mindshare, where he built deep expertise in media planning, client leadership, and agency operations. His move to DoorDash marked a transition from the agency world to brand-side leadership at a major consumer technology company with substantial advertising and marketing spend.

Last updated Oct 23, 2026 by ATDb automated enrichment