Michael O'Halleran – Biography
Last update: February 6, 2026Executive profile
Michael was Executive Chairman & Chief Executive Officer at Aon Benfield, and Chief Financial Officer at Hewlett Packard. Michael O'Halleran joined Ryan Specialty Group in 2018.
Michael O'Halleran is currentlyExecutive Chairman of the Board at Geneva Re - View - Geneva Re org chart
Director at Ryan Specialty Group - View - Ryan Specialty Group org chart
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Education
Michael O'Halleran has a Degree in Accounting and Finance from University of Wisconsin-Whitewater.
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Company Colleagues
- At Geneva Re, Michael O'Halleran has 1 colleague.
- At Ryan Specialty Group, Michael O'Halleran has 313 colleagues including Timothy Turner (CEO), Pat Ryan (Director)…
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- In the Reinsurance industry, Michael O'Halleran has 5,257 colleagues in 394 companies located in 62 countries. 1,352 executive movements have been recorded in the last 12 months. Learn more about Reinsurance.
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