Brian H. Jenn - McDermott Will & Emery


Brian H. Jenn focuses his practice on US and international tax matters for US and foreign multinationals and other clients. As former Deputy International Tax Counsel (DITC) for the US Department of Treasury, Brian has extensive experience and insight on the Tax Cuts and Jobs Act (TCJA), having been deeply involved in the process of issuing proposed and final regulations and other guidance implementing the TCJA. Brian also has significant insights on taxation of the digital economy, transfer pricing and US taxation of foreign currencies.

Prior to joining McDermott, Brian spent several years at the US Department of Treasury where he was an attorney advisor, and most recently DITC. While at Treasury, he served as co-chair of the Organisation for Economic Co-operation and Development’s (OECD) Task Force on Digital Economy and as US delegate to the Committee on Fiscal Affairs. In this capacity, Brian led Treasury’s engagement at the OECD on digital tax issues, playing a central role in discussing tax challenges associated with the digitalization of the economy, as well as the development of new international norms for allocating tax rights among countries.

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  • Chambers USA, Tax, 2022 and 2023
  • The Legal 500 US, Recommended, 2021


  • Board of Trustees, Embers Academy, Niles, IL


Yale Law School, JD, 2007
Northwestern University, MA, 2002
Northwestern University, BA, summa cum laude, Phi Beta Kappa, 1999

District of Columbia