Member Directory
Member Directory

Thomas Gilson

Beus O'Connor McGroder PLLC
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Thomas Gilson
Beus O'Connor McGroder PLLC

Thomas A. Gilson is a member of Beus Gilbert McGroder PLLC, a premier boutique law firm concentrating on High Stakes Litigation, Real Estate and Zoning Law, and Plaintiffs Catastrophic Injury & Wrongful Death. Mr. Gilson is a member of the firm’s High Stakes Litigation practice.


Mr. Gilson represents clients in a wide range of commercial disputes. He is an experienced trial attorney, handling multi-million dollar lawsuits involving financial fraud, professional liability claims, insurance coverage disputes, and other complex litigation matters. He has extensive experience counseling clients in e-discovery and data management and has litigated and negotiated technical issues regarding the preservation and spoliation of evidence. He is recognized by his peers as an AV® Preeminent Lawyer, the highest rating in Martindale-Hubbell.


Before joining the firm, Mr. Gilson was a partner in a major Phoenix firm where his practice included class action suits and representation of clients in government agency investigations. He was also an associate in an international law firm’s Washington, D.C. office and served as a law clerk to the Honorable Thomas A. Flannery of the U.S. District Court, District of Columbia (1995 to 1997) and the Honorable David B. Sentelle of the U.S. Court of Appeals, District of Columbia Circuit (1997 to 1998). Mr. Gilson is an active member of the American Bar Association’s Section of Litigation, serving in the Section’s leadership for more than ten years. He is the recipient of two awards from the ABA: Outstanding Subcommittee Chair and Outstanding Newsletter Editor. A graduate of the Juilliard School, Mr. Gilson is an accomplished classical pianist who has performed at New York’s Lincoln Center and throughout the country.


United States Supreme Court

Supreme Court of the State of Arizona

Supreme Court of the State of Illinois (inactive)

District of Columbia Court of Appeals (inactive)


Harvard College – A.B., cum laude, 1985, John Harvard and Harvard College Scholarships for Academic Achievement

The Julliard School – M.M., Piano Performance, 1987

Northwestern University School of Law – J.D., 1993, Adlai Stevenson III Award for Best Brief, Julius Miner Moot Court Competition, Lowden-Wigmore Prize for Legal Scholarship, Executive Editor, Journal of Criminal Law and Criminology

Memberships & Activities

American Bar Association, Section of Litigation

Co-Chair/Member of Pro Bono Task Force 2017-present

Member, Regional Meetings Committee (assisting Section of Litigation Committees in providing legal education programming for their members) 2015-2017

Member, Roundtable Committee (assisting Section of Litigation Committees in providing legal education programming for their members) 2012-2015

Member, Advanced Planning Leadership Committee (assisting Section of Litigation Committees in sharpening and achieving their goals) 2010-12

Co-Chair, Criminal Litigation Committee 2007-10

Editor-in-Chief, Criminal Litigation Newsletter 2005-07

American Bar Foundation, Fellow

National Institute for Trial Advocacy

Faculty, NITA deposition training program

Board of Directors, Harvard Club of Phoenix

Interview and evaluate applicants for Harvard College

Northwestern Law School

Interview and evaluate applicants to the law school

Board of Directors, Phoenix Symphony 2007-2009


Author, “Updating Federal Procedures for Removal and Venue: The Jurisdiction and Venue Clarification Act of 2011,” ABA Commercial Tort Newsletter May 2012

Co-Author, “Ninth Circuit Approves Preliminary Denial of Class Certification,” ABA Class Actions and Derivative Suits Website March 2010

Co-Author, “Seek and Ye Shall Find?” American Lawyer (E-Discovery Supplement) December 2008

Co-Author, “Internal Investigations: Ten Ways to Avoid Inadvertent Disclosure of Confidential Information,” American Bar Association, Criminal Litigation Committee Website October 2008

Author, “Federal Rule of Criminal Procedure 32(h): R.I.P.,” American Bar Association, Criminal Litigation Committee Website October 2008

Author, “Unpacking the Act of Production Doctrine,” Criminal Litigation Newsletter Winter 2005

Author, “Making Sense of Booker/Fanfan,” American Bar Association, Litigation Section Website; Criminal Litigation Newsletter Spring 2005

Author, “Federal Sentencing Guidelines: The Requirement of Notice for Upward Departure,” published in volume 82 of the Journal of Criminal Law and Criminology 1992

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