Nicholas S. Bahnsen

Nicholas S. Bahnsen joined Kostelanetz & Fink in 2019 after nearly four years as a trial attorney with the U.S. Department of Justice Tax Division.

While at the Department of Justice, Mr. Bahnsen appeared regularly in U.S. District Court and Bankruptcy Court while managing a full docket of civil matters. Mr. Bahnsen coordinated all phases of civil discovery, handling document productions and taking numerous depositions. He also successfully tried jury and non-jury cases. Mr. Bahnsen obtained civil injunctions against tax preparers and businesses with serial employment tax deficiencies, collected millions in unpaid taxes, penalties and interest, and defended the government in tax-related civil suits. He received the DOJ Tax Division Outstanding Attorney Award in 2017.

Prior to joining the Department of Justice, Mr. Bahnsen was an Associate in the Litigation Practice Group at Sills Cummis & Gross, P.C. in Newark, NJ, where he, among other things, managed a 10-attorney team of first-level document reviewers in a large contract dispute. He also served as a U.S. Congressional aide.

Mr. Bahnsen received his B.A. in public policy with a minor in accounting from the College of William and Mary in 2008 and his J.D. from the Vanderbilt Law School in 2012. Mr. Bahnsen served as the Executive Authorities Editor of the Vanderbilt Journal of Transnational Law.


Tel: (212) 808-8100


June 04, 2020

Nicholas S. Bahnsen moderated an American Bar Association panel entitled "Ethical Obligations and COVID19: What Tax Practitioners Need to Know" on June 4, 2020


April 21, 2020

The New Exemption from Required Information Reporting: Revenue Procedure 2020-17 Provides Relief for Certain Tax-Favored Foreign Trusts


Vanderbilt University Law School, J.D. (2012)

College of William and Mary, B.A. (2008)

Bar Admissions

New York

New Jersey

District of Columbia

U.S. District Court for the District of New Jersey

U.S. District Court for the Southern District of New York