Daryl Simm

Daryl Simm is one of the most senior operational leaders in the global advertising industry, serving as Co-President and Chief Operating Officer of Omnicom Group following the company's landmark acquisition of Interpublic Group. In this role, he oversees the operational integration and ongoing management of one of the largest advertising conglomerates in the world, spanning media, creative, data, and technology services across dozens of markets globally. Simm spent the bulk of his career building and leading Omnicom Media Group (OMG), the media services division of Omnicom, where he served as CEO for many years. Under his leadership, OMG grew into one of the two largest media investment groups in the world, housing agency networks including PHD and OMD. He was instrumental in scaling the group's capabilities in programmatic buying, data-driven media planning, and global media investment, positioning OMG as a formidable competitor to rivals like WPP's GroupM. Before his tenure at Omnicom, Simm held senior roles at Procter & Gamble, giving him deep grounding in the client-side perspective of media and advertising investment. This background informed his approach to building agency services that prioritize measurable business outcomes for marketers. His elevation to Co-President and COO of the parent Omnicom Group reflects his standing as a trusted operational steward during a transformative period for the holding company model.

Last updated Jun 24, 2026 by ATDb automated enrichment · Connections updated Jun 29, 2026