Christopher Armstrong is a Washington, D.C., attorney and a member of Holland & Knight's Public Policy & Regulation Group. His practice focuses on representing a broad range of companies, nonprofit entities and individuals through congressional investigations and oversight hearings involving significant legal, regulatory and political risk. Mr. Armstrong also provides counsel and lobbying services regarding tax, healthcare and international trade matters.

Congressional Investigations

Mr. Armstrong has significant experience working in government, including nearly a dozen years on the staff of the Senate Committee on Finance and House Committee on Ways and Means. He most recently served as general counsel and chief oversight counsel to the Committee on Finance under Chairman Orrin Hatch (R-Utah). In this role, Mr. Armstrong led the committee's oversight and investigations activities and advised the chairman and committee members regarding Senate rules and procedure. Mr. Armstrong also previously served as investigative counsel for the committee under then-Ranking Member Chuck Grassley (R-Iowa), who is now the Ranking Member of the Senate Judiciary Committee. In this role, Mr. Armstrong served as lead counsel on several high-profile investigations within the pharmaceutical and medical device industries. In the House of Representatives, Mr. Armstrong conducted congressional investigations for Chairman Dave Camp (R-Michigan) on the Committee on Ways and Means. This work included leading investigations across the committee's jurisdiction, including sensitive tax-related investigations, oversight of government contractors, and inquiries related to compliance with the Stark Law and Anti-Kickback Statute.

At Holland & Knight, Mr. Armstrong has counseled clients through investigations by the U.S. House of Representatives' Committee on Oversight and Reform and its Select Subcommittee on the Coronavirus Crisis, Select Committee to Investigate the January 6th Attack on the United States Capitol, Committee on Energy and Commerce, Committee on Education and Labor, Permanent Select Committee on Intelligence, and Committee on Ways and Means, as well as the U.S. Senate's Committee on Finance, Committee on the Judiciary, and Committee on Homeland Security & Governmental Affairs. These have included matters involving significant document requests, subpoenas, transcribed interviews and hearing preparation, as well as parallel executive branch investigations.

Mr. Armstrong currently serves as co-chair of the American Bar Association's Legislative Process and Congressional Investigations Committee.

Public Policy and Tax Legislative Practice

While on Capitol Hill, Mr. Armstrong worked closely with the U.S. Department of the Treasury, Internal Revenue Service (IRS) and congressional offices on a wide range of policy matters, including the Tax Cuts and Jobs Act of 2017. He also served as one of the lead drafters of the Taxpayer Protection Act of 2016 and Taxpayer First Act of 2018, which was enacted into law as the Taxpayer Protection Act of 2019.

While on the staff of the Committee on Ways and Means, Mr. Armstrong worked closely with the tax and health policy teams on a broad range of matters, including the Patient Protection and Affordable Care Act (ACA) provisions and the Tax Reform Act of 2014. He also was the lead attorney on numerous hearings and legislation concerning the IRS and tax administration.

While serving on the Senate Finance Committee, Mr. Armstrong advised the chairman and nominees as lead counsel during the confirmation process for nominees to the Treasury Department, IRS, U.S. Department of Health and Human Services (HHS) and the U.S. Trade Representative (USTR).

Early in his career, Mr. Armstrong was an attorney for the U.S. Office of Special Counsel (OSC), where he investigated allegations of Whistleblower Protection Act and Hatch Act violations. In addition, he devised prosecution strategy and produced legal opinions for OSC prosecutors and various Inspectors General.

Representative Experience

  • Represented a global media company in an inquiry by the U.S. House of Representatives Permanent Select Committee on Intelligence
  • Advised national transportation companies in a U.S. Senate inquiry related to firearms shipments
  • Represented various recipients of the Coronavirus Aid, Relief and Economic Security Act (CARES Act) funding during investigations and audits by the House Select Subcommittee on the Coronavirus Crisis and U.S. Department of the Treasury Office of Inspector General
  • Represented numerous current and former government officials through myriad House and Senate investigations, including inquiries by the Senate Committee on Finance, Senate Judiciary Committee, Senate Homeland Security and Government Affairs Committee, and the House Select Subcommittee on the Coronavirus Crisis
  • Represented a Fortune 50 healthcare company in numerous drug pricing investigations by House and Senate committees and individual senators
  • Represented a multinational hospitality company in an inquiry by the Select Committee to Investigate the January 6th Attack on the U.S. Capitol
  • Represented an aerospace manufacturing company through House and Senate investigation related to U.S. Department of Defense (DOD) contracting
  • Represented an investment firm through a Senate Committee on Finance investigation related to tax deductions
  • Represented a large private research university in an inquiry by the House Committee on Ways and Means related to college athletics
  • Prepared executives of multinational construction and property management companies for House and Senate hearings
  • Represented a digital assets trade association in an inquiry by the House Committee on Financial Services
  • Represented a public accounting and consulting firm in a Senate Committee on Finance investigation related to Opportunity Zones
  • Prepared a global tobacco company executive for testimony before the House Committee on Energy and Commerce related to e-cigarettes
  • Prepared numerous political nominees for Senate confirmation hearings


  • The Catholic University of America Columbus School of Law, J.D.
  • Kennesaw State University, B.S., Political Science
Bar Admissions/Licenses
  • District of Columbia
  • Virginia
Court Admissions
  • Supreme Court of Virginia
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. Tax Court
  • The Federalist Society, Executive Committee, Administrative Law & Regulation Practice Group
  • American Bar Association, Legislative Process and Congressional Investigations Committee, Co-Chair
  • Independent Sector, Public Policy Fellow
  • Hoover Institution at Stanford University, Congressional Fellow
  • Stennis Center for Public Service Leadership, Congressional Fellow
  • Catholic University Law Review, Editor
Honors & Awards
  • Chambers USA – America's Leading Business Lawyers guide, Government Relations: Congressional Investigations, 2021, 2022
  • Crisis Management Trailblazer, The National Law Journal, 2020
  • Holland & Knight Pro Bono All-Star, 2020, 2021
  • The Legal 500 USA, Government Relations, 2019


Speaking Engagements