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Zachary Ballweg, FCAS, MAAA

Consulting Actuary
Brookfield, WI, US

Tel: +1 262 7842250

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Professional Designations

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


  • BS, Atmospheric and Oceanic Sciences, University of Wisconsin, Madison
  • MS, Actuarial Sciences, University of Wisconsin, Madison

Current Responsibility

Zach is a consulting actuary with the Milwaukee office of Milliman. He joined the firm in 2007.


Zach's area of expertise is property and casualty insurance, particularly the tasks of loss reserving, cash flow modeling, and ratemaking. He has experience in both the commercial and personal lines with particular emphasis in crop insurance (Federal MPCI), mortgage insurance, workers' compensation, and commercial professional liability. He has also assisted in a number of merger and acquisition assignments and has aided start-up Excess and Surplus lines writers in setting initial levels of reserves.

Presentations and publications

Zach has spoken at several insurance industry conferences sponsored by the Casualty Actuarial Society. Zach also co-authored "Peaks and Troughs: Reserving Through the Market Cycle," published in the Casualty Actuarial Society E-Forum, Fall 2013.

  • Work at Milliman

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