Daniel (Don) H. Callahan

Daniel (Don) Callahan is a corporate director and serves as the Non-Executive Chairman of Time USA, LLC. From 2007 until his retirement in December 2018, Mr. Callahan held several officer roles at Citigroup, including most recently as Citigroup’s Chief Administrative Officer and Global Head of Operations, Technology and Shared Services. Prior to joining Citigroup, Mr. Callahan held various senior executive positions at Morgan Stanley and Credit Suisse. Earlier in his career, he spent 12 years at IBM, where he held a number of management positions, including Director of Strategy for IBM Japan. Mr. Callahan holds a B.A. in history from Manhattanville College, where he serves as Trustee Chair Emeritus.

• Environmental, social, and governance (ESG) matters
• Financial services
• Human capital management and executive compensation
• Risk management
• Technology

• Director since June 15, 2021
• Member of Audit and Conduct Review Committee and Risk Committee
• Independent

• WEX Inc.