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Mary Ann McMahon, FCAS, MAAA

Consulting Actuary
Wakefield, MA, US

Tel: +1 781 2136200

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Professional Designations

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


  • BA (magna cum laude), Economics, Tufts University

Current Responsibility

Mary Ann McMahon is a consulting actuary with the Boston office of Milliman. She joined the firm in 2001.


Mary Ann has been involved in a variety of property and casualty consulting assignments, including reserve analyses, ratemaking, loss projections, feasibility studies, pro forma financial projections, and data analysis. She serves a wide variety of commercial lines clients, particularly those in the alternative risk market. These include multi-line property and casualty insurers, captives, self-insurers, risk-retention groups, and state insurance departments.

Mary Ann works for several clients in the health care industry, including hospitals, long-term care facilities, and nursing homes. She provides on-going actuarial support related to funding and reserving for their property and casualty coverages.

Mary Ann has assisted the insurance departments in Maryland and Massachusetts with the examinations of several large property and casualty insurance companies. She has also assisted in the review of hundreds of rate filings for the insurance departments in Kentucky, Maryland, New Hampshire, Rhode Island, and Vermont.


  • Mary Ann is a current and past member of several committees for the Casualty Actuarial Society and American Academy of Actuaries.
  • Work at Milliman

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