Debbie Crosbie joined as CEO of Nationwide Building Society in June 2022 and has over 25 years of experience in financial services leadership, including business and retail banking, IT and digital transformation strategy, and mergers and acquisitions. Prior to this Debbie was CEO at TSB bank (May 2019 – June 2022), where she led a rapid and successful turnaround of the UK bank's reputation and financial performance, and Group Chief Operating Officer at Clydesdale Bank/CYGB (1997–2019).

Debbie is non-executive director of the energy and networks company SSE plc and a member of its audit committee and energy markets risk committee. She is also non-executive director of UK Finance and a member of the Glasgow Economic Leadership Board and the Strathclyde University Business School Advisory Board. Debbie is a member of the FCA Practitioner Panel and previously the PRA Practitioner Panel.

Debbie holds an honours degree in Industrial Relations from the University of Strathclyde and is a fellow of the Chartered Institute of Bankers.