Rival Strengthens Leadership with Appointment of Kostas Voudouris as Chief Product Officer and Partner

Dec. 10, 2025

Rival, the independent integrated marketing consultancy, has appointed Kostas Voudouris as partner and chief product officer—a new position. The move underscores the consultancy’s commitment to reinventing the agency model through tech-enabled and AI-native services. 

With more than 15 years of experience in advertising and marketing, Voudouris has led transformative work at WPP agency, EssenceMediacom and Choreograph. Leading innovation and product teams, he built AI-driven solutions, commerce platforms, and media technology for global brands such as Apple, Google, NBCUniversal and L’Oréal. From prototyping breakthrough ideas to scaling enterprise platforms used by 80+ clients worldwide, Kostas has a track record of translating emerging technology into business impact.

Voudouris said:

"I’m thrilled to be joining the incredible team at Rival. I can’t wait to help turn our sharpest thinking into agent-powered products and practical tools that help challenger brands stand out and scale."

 

Eric Fulwiler, CEO and co-founder of Rival, added:

"Our vision from day one has been to reinvent the agency model for the present and future. Technology and AI have a huge role to play in what that operating model needs to look like. Bringing someone of Kostas’s caliber and experience to lead that mission is a huge milestone for us."

 

Rival has experienced rapid momentum in recent years, expanding its roster and work with brands such as Burger King, Xerox, Wonder, and Webflow and growing their global team to 40.