Chief Transformation Officer at Xandr (Microsoft Advertising)
Leading the strategic transformation and Microsoft integration of Xandr, with a focus on premium programmatic advertising and connected TV monetization solutions.
Last updated Mar 28, 2026 by AI Enrichment
Catherine Williams serves as Chief Transformation Officer at Xandr, the advanced advertising platform acquired by Microsoft in 2022, where she leads the strategic and operational integration of Xandr's capabilities into the broader Microsoft Advertising portfolio. Her work sits at the intersection of enterprise transformation and programmatic innovation, with a particular focus on premium inventory, connected TV, and data-driven advertising solutions that serve both buyers and sellers at scale. Williams has built her career navigating the complex intersection of technology, media, and advertising, developing expertise in programmatic infrastructure and the evolving landscape of addressable TV. Her role at Xandr places her at the center of one of AdTech's most significant platform consolidations, as Microsoft works to position itself as a major force in the open internet advertising ecosystem following its acquisition of the former AT&T advertising unit. Her focus on connected TV and premium programmatic reflects broader industry shifts toward streaming monetization and the demand for more sophisticated, privacy-conscious targeting solutions. Williams is recognized for her ability to align product strategy with go-to-market execution during periods of significant organizational change.