JoAnn C. Stonier serves as Chief Data Officer for Mastercard, leading the organization’s data innovation
efforts while navigating current and future data risks. She oversees the curation, quality, governance and
management of the company’s extensive data assets. JoAnn and her team design and operationalize
Mastercard’s global data strategy, guiding enterprise deployment of cutting-edge data solutions,
including advanced analytics and AI, and the development of enterprise data platforms.
Her leadership is integral to Mastercard’s push to deepen the strategic value it can provide its merchant,
banking and government customers and cardholders through its expanding data-driven products and
JoAnn previously served as the company’s Chief Information Governance & Privacy Officer, responsible
for global privacy and information governance, and leading regulatory engagement for data compliance.
JoAnn is a recognized and highly sought-after thought leader in emergent data and privacy issues. She
has advised industry executives, governments, intergovernmental organizations and NGOs. Currently, she
serves on the United Nations Expert Group on Governance and Artificial Intelligence and is Co-Chair of
the World Economic Forum’s Global Future Council on Data Policy. JoAnn also serves as a Board Advisor
for Truata, a data trust co-founded by Mastercard and IBM, on the Board of Directors and Governance
Committee for Hope For The Warriors, a non-profit Veteran service organization, and on the Board of
Trustees and Executive & Finance Committees for Academy of Mount St. Ursula, where she attended high
school in Bronx, New York.
JoAnn received her Juris Doctorate from St. John’s University and her Bachelor of Science degree from St.
Francis College. She holds memberships in the Bar of the State of New York and the Bar of the State of
New Jersey. She is based in Purchase, N.Y.