Omnicom Media has announced the appointment of Ellen Griffin as Global Brand President of OMD.
In her new role, Griffin, who most recently served as the agency’s President, Global Chief Operating Officer, will oversee strategy, capabilities and service solutions for OMD globally. The mandate includes ensuring that teams across markets are equipped with the tools, talent and technology required to drive growth for clients and the network.
She succeeds George Manas, who has moved to Omnicom as Chief Growth and Solutions Officer.
“George has been an exceptional steward of the OMD brand over the past four years,” said Florian Adamski, CEO of Omnicom Media. “Under his leadership, OMD significantly advanced its position as the world’s best performing media agency, leading the Research Company Evaluating Media Agencies (RECMA) to describe OMD as “more than ever the leader” in its latest Diagnostic Report.
During his tenure, OMD was named Media Network of the Year at Cannes three times, including consecutive wins in 2024 and 2025. This remarkable record reflects both the strength of the agency and George’s ability to drive collaboration among teams around the world – a talent that will serve him well in his new role.”
Griffin joined the agency in 2018 as Global Innovation Director.
“As the orchestrators of client success, our agencies need true practitioner-leaders – executives who have worked side-by side with marketers as they navigate an increasingly challenging marketplace and know how to connect the full spectrum of Omnicom marketing capabilities needed to drive outsize growth. Ellen exemplifies that model. She brings deep experience leading marketing transformation for clients including Clorox, McDonald’s, and PepsiCo, and she will ensure that OMD agencies around the world fully leverage Omnicom Media’s market-leading strengths in scale, data, identity, commerce, and talent to unlock growth for our clients," added Adamski.
“In this environment, clients need partners who help them navigate not only the challenges they see, but the ones they do not yet recognize,” said Griffin. “OMD plays a critical role in helping clients move through this complexity. By connecting insights, platforms, data, and media strategy, we help clients anticipate change, unlock new opportunities for growth, and act with confidence in an increasingly dynamic landscape. My priority is ensuring our teams feel empowered, connected, and equipped to deliver exceptional results for their clients every day.”
Griffin’s appointment is effective immediately.
