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Jonathan B. Winn, MAAA, FCAS

Pasadena, CA, US

Tel: +1 626 5771144

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Professional Designations

  • Member, American Academy of Actuaries
  • Fellow, Casualty Actuarial Society


  • BS, Applied and Computational Mathematics, California Institute of Technology

Current Responsibility

Jonathan is an actuary with the Los Angeles office of Milliman. He joined the firm in 2008.


Jonathan has experience providing casualty actuarial services to a broad range of clients, including and governments and governmental entities, private insurance carriers, and a variety of self-insurance and risk-retention programs with a focus in the healthcare industry. He has concentrated in workers' compensation, general liability, and medical professional liability exposures.

Prior to joining Milliman, Jonathan worked for a national carrier in the personal lines automobile insurance department. His duties included pricing, predictive modeling, and regulatory filings.

  • Work at Milliman

    • “I was offered a chance to come in, shake things up, create something."
    Work at Milliman