Dennis Hancock serves as Chief Information Officer, Executive Vice President of Pfizer, where he leads the company's enterprise digital, AI, and technology strategy. With more than 30 years of experience spanning roles across Pfizer, including R&D and global commercial solutions, Dennis brings a unique and broad perspective on how technology and AI create real value for patients, customers, and colleagues.

Dennis and his team harness the power of AI and technology to drive innovation across every aspect of the business––from how Pfizer discovers and develops medicines, to manufacturing, commercialization, and how the company engages with patients, physicians, and health systems.

Before assuming the CIO role, Dennis served as Senior Vice President of Digital, leading enterprise product management, and learning and development. He served on the leadership teams for Pfizer's Chief Digital Officer, Chief Legal Officer, and Chief People Experience Officer. In 2024, Dennis founded Health Answers by Pfizer, a generative AI-powered platform that delivers up-to-date, relevant answers to consumers’ health and wellness questions. Since launching, the platform has earned a Webby People's Choice Award, PM360's Product Launch of the Year, and recognition from Fast Company in 2025.

Earlier, he served as the first GM of Pfizer's Digital Health business unit, where he established the company's AI and Generative AI strategies and led the enterprise analytics and data organization. He has also held leadership roles in customer experience, commercial enablement, and Pfizer's external market-facing digital solutions.

Dennis is a member of World 50 and an advisor to Osage Ventures and University Partners. He holds a Bachelor of Science from the University of Maryland.

Dennis is grateful to his wife, Christine, and son, Dennis, for serving as his foundation in all that he does.