Kate Sirkin — Chief Data Officer at Epsilon

Kate Sirkin has been appointed as Chief Data Officer at Epsilon, a global advertising and marketing technology company owned by Publicis Groupe. Sirkin is a well-known and highly respected figure in the media measurement and data industry, having previously served in senior roles at organizations including Publicis Media and the Coalition for Innovative Media Measurement (CIMM), where she was deeply involved in advancing cross-platform measurement standards. Her appointment to the CDO role at Epsilon signals a strategic emphasis on data leadership and governance at one of the industry's most prominent identity and data platforms. Epsilon is known for its CORE ID identity solution and its extensive first-party data assets, making the CDO role critically important to its competitive positioning. The source of this information is CIMM's announcement of 2026 priorities and new board appointments, suggesting Sirkin's transition from a CIMM-affiliated role into this executive position at Epsilon.

Sirkin's appointment as CDO at Epsilon carries meaningful implications for the AdTech ecosystem, particularly in the areas of identity resolution, data strategy, and cross-platform measurement. Epsilon has been a key player in the post-cookie identity landscape, and having a CDO with Sirkin's deep background in measurement standards and industry collaboration could accelerate Epsilon's efforts to build more interoperable and credible data solutions. Her ties to CIMM and the broader measurement community may also strengthen Epsilon's relationships with broadcasters, agencies, and industry bodies working on unified measurement frameworks. Competitively, this move reinforces Publicis Groupe's commitment to data-driven marketing infrastructure at a time when rivals like The Trade Desk, LiveRamp, and Nielsen are all vying for influence in the identity and measurement space. The appointment also reflects a broader industry trend of elevating data governance and strategy to the C-suite level as privacy regulations and signal loss reshape how advertisers target and measure audiences.