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Justin Sok

Prior to joining the firm, Justin was the Managing Director at the Securities Industry and Financial Markets Association (SIFMA). At SIFMA, Justin was responsible for a range of advocacy issues including tax, retirement, congressional oversight, and ESG policy. He managed the SIFMA Federal Tax Committee, which is comprised of senior corporate tax officers of Fortune 500 financials institutions. He also led the advocacy efforts of Alliance for Savings and Investment, a coalition of companies and trade associations committed to a competitive capital gains and dividend rate.


Justin joined SIFMA from the U.S. Department of the Treasury where he was responsible for the development and execution of policy positions including tax, and trade as a senior advisor in the Office of Legislative Affairs. He was a key liaison to Capitol Hill and the stakeholder community on the implementation of the Tax Cuts and Jobs Act oof 2017; the Administration’s engagement with the OECD on BEPS 2.0 and many other issues.


Prior to Treasury, Justin previously served as a policy advisor for several members of the U.S. House of Representatives including legislative director and lead policy advisor to Rep. Jason Smith (R-MO), the current Chairman of the House Ways & Means Committee. During his time on the Hill, he was involved in the development and passage of legislation like the Preventing Americans from Tax Hikes (PATH) Act of 2015; the Trade Facilitation and Trade Enforcement Act of 2015, and the Tax Cuts and Jobs Act of 2017.


Mr. Sok is a graduate of the University of Kentucky with a B.A. in history.

  • Notable Facts

    • Senior Advisor, U.S. Department of Treasury Office of Legislative Affairs
    • Policy Advisor, and Legislative Director to Ways & Means Chairman Jason Smith
    • B.A., University of Kentucky