John O'Brien – Biography

Last update: April 23, 2026

Executive profile

John O'Brien is currently

Chief Medical Officer at Gen Re UK & Ireland - View - Gen Re UK & Ireland org chart



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  • In the Reinsurance industry, John O'Brien has 5,242 colleagues in 394 companies located in 62 countries. 1,327 executive movements have been recorded in the last 12 months. Learn more about Reinsurance.

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Through the switchboard, call Gen Re UK & Ireland at +44 207... and ask for John O'Brien.

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