The 2018 Speakers
Senior Tax Counsel
Office of U.S. Senator John Thune
511 Dirksen Senate Office Building
Washington, D.C. 20510
Mark Warren is Senior Tax Counsel to Senator John Thune (R-South Dakota). Prior to returning to the Senate in 2017, he served as a Tax Counsel to the House Committee on Ways and Means for nearly five years and worked primarily on tax reform. He has spent more than 18 years in the government handling tax, pension, and other financial issues. Mark served as the Deputy Assistant Secretary (Tax and Budget) in the U.S. Treasury Department’s Office of Legislative Affairs and worked on several congressional committees as well as for individual members of the House and Senate. Mark holds a Bachelor’s degree in finance and a law degree from Georgetown University, and an LLM in taxation from New York University. He has also spent time in the private sector and has practiced law in New York, NY, and Washington, DC.
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