Don Callahan

Daniel H. (Don) Callahan is an Executive Partner at Bridge Growth Partners, and a leader in both the financial services and technology industries. He currently serves as a Director of Solace, and is a former Director of Accedian. 

Prior to retiring in 2018, Mr. Callahan was the Chief Administrative Officer and Global Head of Operations and Technology at Citigroup. He currently serves on the Boards of Directors of Kore.ai, ScotiaBank, Tata Consulting Services, and Wex. Additionally, as Chief Executive Officer of Callahan Advisors, LLC, he advises global companies with their digital transformation and technology start-ups with differentiated growth strategies. 

At Citigroup, Mr. Callahan managed a complex set of businesses and services spanning more than 100 countries, a multi-billion dollar operating budget and critical systems infrastructure including the bank’s cyber security initiatives. He led a top-to-bottom transformation of operations and technology, helping move the global bank from a collection of independent and dispersed entities into a lean, fully integrated enterprise. Mr. Callahan also established globally consistent technology standards and governance, and migrated critical functions to an integrated, managed, shared services model. As a result, in 2017, Citi was named by the Gartner Group as the most efficient of all major global banks in generating income per dollar of IT spending.

Earlier in his career, Mr. Callahan served in senior executive positions at Morgan Stanley and Credit Suisse and spent 12 years at IBM, where he held several management positions, including director of strategy for IBM Japan.

He serves as the Non-Executive Chairman of TIME, where he is leading a comprehensive digital transformation of this iconic media brand. He is also on the business committee of the Metropolitan Museum of Art, a fellow at the Foreign Policy Association, a member of the Board of Trustees of Columbia University Teachers College, and a member of the Tech Advisory Board of NYU Stern – Andre Koo Tech MBA. He holds a B.A. in History from Manhattanville College, where he serves as Trustee Chair Emeritus.