Catherine Williams
Catherine Williams is Chief Data Officer at Candid, a nonprofit data provider, where she serves as the organization's first-ever CDO following her appointment in November 2024. She holds a PhD in mathematics and has built a distinguished career at the intersection of data science and digital advertising, having previously served as Chief Data Scientist at Xandr, Chief Data & Marketplace Officer at AppNexus, and VP of Data & AI at Qualtrics. Williams is recognized as a senior leader who brings rigorous mathematical expertise and deep AdTech experience to data strategy and marketplace innovation.
Last updated Jun 6, 2026 by the ATDb Editorial Team · Connections updated Sep 28, 2026
AI-drafted from public sources6 sources cited
- Years in industry
- 15 years
Bio
Catherine Williams is Chief Data Officer at Candid, a nonprofit data provider, where she serves as the organization's first-ever CDO following her appointment in November 2024. She holds a PhD in mathematics and has built a distinguished career at the intersection of data science and digital advertising, having previously served as Chief Data Scientist at Xandr, Chief Data & Marketplace Officer at AppNexus, and VP of Data & AI at Qualtrics. Williams is recognized as a senior leader who brings rigorous mathematical expertise and deep AdTech experience to data strategy and marketplace innovation.
Career
Roles with a cited source. All linked roles are in the Roles tab.
Expertise & education
Expertise
Speaking topics
Recognition
Notable achievements
- Leading the operational and product integration of Xandr into Microsoft Advertising following the 2022 acquisition
- Overseeing product strategy for Xandr's connected TV and premium programmatic solutions during a critical platform transition