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Meet Our Board of Directors: Ellen M. Costello

Meet Our Board of Directors  •  April 17, 2026
Audio Description

VIDEO HIGHLIGHTS

  • Former President and CEO of BMO Financial Corporation, Ellen built a 30-year global career across Toronto, New York, Hong Kong and Chicago
  • She views culture as a strategic asset and values Citi’s emphasis on accountability and collaboration
  • For growth, she urges leaders to take on hard assignments, learn from failure and seek candid feedback

In this series, we sit down with members of our Board to explore their careers, leadership philosophies and the experiences that shape their decision-making. From former regulators to seasoned private-sector leaders, each brings the expertise and judgment needed to help guide a global financial institution.

Ellen is a veteran banking executive who became CEO of BMO Financial Corp., steering U.S. operations for one of North America’s largest banks.

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Hear more from our other Board of Directors.

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