Ms. Callahan brings decades of combined federal and self-regulatory expertise in securities clearing and financial market infrastructures.

Most recently, at the Securities and Exchange Commission (SEC), Division of Trading and Markets, she served as Senior Policy Advisor and Blockchain Fellow in the Office of Clearance and Settlement. She contributed to the supervision of the registered clearing agencies’ operations modernization, governance and risk management, encompassing such projects as the U.S. transition to T+1 settlement, U.S. Treasury clearing mandate, new models of exchange-traded funds and LIBOR/SOFR transition. She also engaged with exchanges, clearing agencies, and fintech platform operators on digital assets and emerging technologies and represented the SEC in the Trilateral U.S. Agencies Working Group on Infrastructure Modernization and CPMI-IOSCO Operational Risk Group’s Third Party Risk Working Group.

This work drew on Ms. Callahan’s earlier career experiences at DTCC and as a post-trade advisor to the International Monetary Fund and Inter-American Development Bank, as well as a strategic advisor to Paxos and Securitize and Managing Director at State Street, focusing on the potential of digital assets and payments to enhance and integrate with traditional regulated financial markets.

As Managing Director at DTCC in New York and London, she managed global relations and development, strategic relationships, and international alliances, and extended DTCC’s reach by implementing 16 cross-border clearing and depository links with market infrastructures in Asia, Europe, and the Americas. She also chaired the Americas’ Central Securities Depositories Association, among many other industry roles, including the boards of the World Forum of Central Securities Depositories and the Global Association of Central Counterparty Clearers (CCP Global) and served on the Federal Reserve’s Faster Payments task forces leading up to FedNow real-time payments.

She received her MBA in finance from NYU Stern and B.A. from Manhattanville University.