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Mark A. Trieb, FSA, MAAA, EA, MIAA

Principal, Consulting Actuary
Dallas, TX, US

Tel: +1 214 8635515

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Professional Designations

  • Fellow, Society of Actuaries
  • Member, American Academy of Actuaries
  • Enrolled Actuary, ERISA
  • Member, International Actuarial Association
  • Member, Society of Professional Administrators and Recordkeepers


  • BBA (summa cum laude), University of Texas
  • MBA (ranked first in class), University of Texas Graduate School of Business

Current Responsibility

Mark is a principal and consulting actuary in the firm and manages the Employee Benefits practice of the Dallas office of Milliman. He opened the Dallas office in 1983.


An expert in the area of employee retirement benefit programs, Mark's consulting activities primarily focus on the design, communication, implementation, administration, and funding of a wide range of retirement benefit programs, including traditional pension plans, hybrid plans, profit sharing plans, 401(k) plans, and ESOPs.

Mark is actively involved in planning for the future development and implementation of firmwide computer support systems (hardware, software, and technical support) in the employee benefits area. He was an instrumental member of the software development team that designed Milliman's valuation and administration system and transactional-based recordkeeping system.

Mark served on Milliman's Board of Directors for four years and was the firm's National Practice Director of Retirement Plans for three years. 

  • Work at Milliman

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