CHUCK RETTIG, served as Commissioner of the Internal Revenue Service (2018–2022) and is now a Shareholder at Chamberlain Hrdlicka in the Firm's Tax Controversy & Litigation, Other Tax and Trust & Estate practices. As Commissioner, he presided over the nation’s tax system, managing an agency of more than 83,000 employees and an annual budget of more than $14.1 billion generating annual gross revenue of approximately $4.9 trillion (representing more than 95% of the gross revenue of the United States). In recognition of his IRS leadership, Commissioner Rettig received the Alexander Hamilton Award, the highest honor for individuals selected by the Treasury Secretary.

At Chamberlain Hrdlicka, Mr. Rettig specializes in resolving tax matters for business and corporate entities as well as high-wealth families and their closely held business entities throughout the world. His practice focuses on tax, estate and wealth planning, family offices, federal and state tax controversies and investigations, including complex and sensitive issue examinations, administrative appeals, and tax litigation, as well as representation in criminal tax investigations and prosecutions. He is a Certified Specialist in both Taxation Law and in Estate Planning, Trust & Probate Law (The State Bar of California, Board of Legal Specialization) admitted to practice law in California, Hawai’i and Arizona (inactive).
Chuck Rettig has been a featured speaker and panelist at hundreds of professional conferences throughout the United States, in Europe and in Central America. Before joining the IRS, Chuck Rettig was listed by Chambers USA as the only Eminent Practitioner in the Chambers Category “Tax: Fraud – Nationwide.” On multiple occasions, he was selected by his peers as the Tax "Lawyer of the Year" (Litigation and Controversy, Los Angeles) for Best Lawyers' and was included Nationwide in both “Litigation and Controversy – Tax” and “Tax Law” by Best Lawyers in America. As stated in Chambers USA: America’s Leading Lawyers for Business, "According to peers, Charles Rettig . . . is ‘phenomenal, just phenomenal.' Further, he "is regarded by market sources as a 'brilliant and gifted lawyer . . . a real star and a national leader'" who “enjoys a superb reputation and benefits from ‘great presence.’” Chambers USA has further stated “Fantastic controversy tax lawyer” Charles Rettig is “knowledgeable and very intelligent . . . a force to be reckoned with . . . a driving force in policy making at the national level with great client skills when it comes to sensitive matters.”

Mr. Rettig has held leadership roles in a number of professional organizations, including Chair of the IRS Advisory Council (IRSAC), Institute Co-Chair of the ABA Annual National Institute on Criminal Tax Fraud and Tax Controversy (for 8 years), Chair of the UCLA Annual Tax Controversy Institute (for 20+ years), “Tax Controversies” Chair for the NYU Institute on Federal Taxation (for more than 10 years), National Board of Advisors for the Graduate Tax Program (LL.M. in Taxation) at NYU University School of Law, Vice Chair-Administration for the American Bar Association’s Section of Taxation, President of the American College of Tax Counsel, Chair of the Civil & Criminal Tax Penalties Committee of the ABA Section of Taxation, Chair of the Taxation Section of the State Bar of California and as an Advisory Board Member for the CA Franchise Tax Board and for the CA State Board of Equalization.

Chuck Rettig is a co-founder of the UCLA Extension VETS COUNT Scholarship Fund designed to provide scholarships for active duty and retired military personnel who are working to realize their career goals in tax, accounting, and wealth management. Mr. Rettig is currently serving as a Board Member/ Senior Advisor on behalf of various next-generation technology organizations as well as firms providing advanced blockchain investigation and recovery tools and insights for law enforcement agencies, financial institutions, and threat intelligence platforms.