John Gentry

John Gentry leads Epsilon, a global marketing technology powerhouse operating at the intersection of data, identity, and advertising technology. As CEO, he oversees one of the industry's most significant first-party data and identity resolution platforms, guiding major brands through the complex transition away from third-party cookies toward privacy-compliant audience targeting. Epsilon's scale — serving hundreds of Fortune 500 clients and processing billions of consumer interactions — makes Gentry's strategic decisions consequential across the broader AdTech ecosystem. Gentry's career has been rooted in data-driven marketing and technology services, with deep experience navigating the evolving regulatory and technical landscape of digital advertising. Under his leadership, Epsilon has invested heavily in its CORE ID identity solution and its connected data platform, positioning the company as critical infrastructure for advertisers seeking durable, consent-based ways to reach consumers across channels. His tenure has coincided with Epsilon's integration into Publicis Groupe's broader Power of One strategy, amplifying the company's reach across media, creative, and data disciplines. As the industry grapples with signal loss and privacy regulation, Gentry has been a consistent advocate for first-party data activation and outcome-based marketing models. His focus on measurable business results — rather than proxy metrics — reflects Epsilon's positioning as a performance-oriented alternative to walled garden advertising ecosystems.

• Led Epsilon's strategic repositioning as a privacy-first identity and data platform amid the deprecation of third-party cookies
• Oversaw Epsilon's integration into Publicis Groupe's Power of One strategy, expanding its reach across global marketing services
• Scaled Epsilon's CORE ID as a widely adopted identity solution for brands seeking cookieless audience targeting