Gabrielle G. Hirz

Senior Attorney

  • JD, cum laude, Boston University School of Law, 2007
  • BA (Political Science), Phi Beta Kappa, General and Departmental Honors, University of Chicago, 2004


  • New York, 2017
  • Massachusetts, 2016
  • Pennsylvania, 2016
  • District of Columbia, 2008

Court Admissions

  • U.S. Tax Court
  • U.S. Court of Federal Claims
  • U.S. District Court for the District of Massachusetts
  • Boston Co-Chair, Federal Bar Association Tax Section, 2017-2018
  • American Bar Association

Gabrielle G. Hirz

Senior Attorney

Gabrielle Hirz joined Ropes & Gray in 2016 as a senior attorney in the tax controversy group. Gabrielle has extensive experience in federal district and bankruptcy court litigation. She has handled all aspects of litigation matters, from independently developing case strategy, managing fact and expert discovery, taking depositions and arguing dispositive motions to serving as lead counsel at trial, and arguing bankruptcy appeals. 

Prior to joining the firm, Gabrielle was a Trial Attorney at the U.S. Department of Justice, Tax Division, where she represented the United States in the U.S. District and Bankruptcy Courts in affirmative and defensive cases involving tax, property, and bankruptcy law, and touching upon a wide range of legal issues.

Additionally, prior to working in government, she worked for two years in securities enforcement for a major law firm where she advised clients under investigation by the U.S. Securities & Exchange Commission for insider trading and other securities violations.


  • As co-counsel, represented the United States in a tax refund suit involving a complex corporate reorganization analyzed under the judicial doctrines of economic substance and substance over form*
  • Obtained, as first-chair trial counsel, a favorable decision after trial on behalf of the United States finding that the taxpayer was the true owner of property held by a nominee*
  • Achieved, as first-chair trial counsel, a favorable morning of trial concession on a contested motion to dismiss a bankruptcy case for bad faith filing*
  • Prevailed, as first-chair trial counsel, in a bench trial of a refund suit regarding deductibility of hobby losses*

Experience Prior to Joining the Firm*


  • Kat Gregor, Gabrielle Hirz and Hillel Nadler, “The IRS Needs Help,” Law360 (February 2, 2017)
  • Kat Gregor and Gabrielle Hirz, “A Loose Standard For IRS Summons Enforcement,” Law360 (August 16, 2016) (subscription required)