Our Company

William D. Winningham, MAAA, EA

St. Louis, MO, US

Tel: +1 314 2313031

E-Mail | Download bio | VCard

Professional Designations

  • Member, American Academy of Actuaries
  • Enrolled Actuary, ERISA


  • BS, Actuarial Science, University of Illinois

Current Responsibility

Bill is an actuary with the St. Louis office of Milliman. He joined the firm in 1997.


Bill's area of expertise is defined benefit actuarial work, including both pension and other postretirement benefits. He manages the production of the actuarial calculations for valuations, cost studies, and liability projections. His clients include corporate, public, and multiemployer plans. He is an experienced user of Milliman's valuation system and currently serves as the office representative on Milliman's GASB 45 Task Force.

  • Work at Milliman

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