Dennis Buchheim

Dennis Buchheim has worked in digital advertising for 20+ years, driven to ensure content and services remain accessible and useful. He is a product-oriented leader who has led organizations to define, launch, and manage demand-side platforms, ad exchanges, targeting systems, identity solutions, audience insights tools, measurement and verification platforms, and other large-scale products/programs in advertising and beyond.

Dennis founded advisory firm ThinkMedium (www.thinkmedium.tech) in 2023 to advance his mission, helping ads and media clients navigate shifts and opportunities in privacy and data strategy, safety, and efficiency.

He was previously a VP at Meta, recruited to collaborate with the advertising ecosystem on privacy, measurement, and trust/safety, with scope later expanded to data science and enablement across business products. This role built on Dennis’ tenure as CEO of advertising technical standards body IAB Tech Lab and his prior ad tech product/business leadership experience at Yahoo and Microsoft.

Before “finding advertising” in 2002, Dennis held engineering and product roles at Apple, Oracle, Actioneer, and iHarvest (which he co-founded), working on a range of enterprise and consumer software products. Dennis earned dual degrees from Brown University, in computer science and business economics.

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