Overview
Thomas is a trademark attorney in the firm’s Intellectual Property Practice Group. His practice focuses on the acquisition, enforcement, and litigation of intellectual property rights, particularly related to trademarks and copyrights, both domestically and internationally.
Experience
Solutions in action
Prior to joining Michael Best, Thomas was a federal prosecutor at the United States Department of Justice (DOJ). At the DOJ, he litigated civil, criminal, and appellate cases for the U.S. Attorney’s Office for the Western District of Wisconsin before assuming a role prosecuting white collar criminal offenses for the DOJ’s Tax Division in Washington, D.C.
Thomas also served as a law clerk to the Honorable Roger L. Wollman at the U.S. Court of Appeals for the Eighth Circuit and to the Honorable Roberto A. Lange at the U.S. District Court for the District of South Dakota. He began his legal career in the Washington, D.C. office of a large international law firm, where he represented clients in trademark enforcement and litigation matters.
Credentials
- University of Wisconsin Law School, Juris Doctor (J.D.), Editor, Wisconsin International Law Journal; Moot Court Executive Board; Class Commencement Speaker, 2007, Order of the Coif
- Cornell University, Bachelor of Arts (B.A.), 2004, with distinction
- District of Columbia
- Wisconsin
- Illinois
- Supreme Court of the United States
- United States Court of Appeals, Federal Circuit
- United States Court of Appeals, District of Columbia Circuit
- United States Court of Appeals, Second Circuit
- United States Court of Appeals, Seventh Circuit
- United States Court of Appeals, Eighth Circuit
- United States District Court, District of Columbia
- United States District Court, Eastern and Western Districts of Wisconsin
- United States District Court, Central and Northern Districts of Illinois
- The World’s Leading Trademark Professionals – World Trademark Review 1000, 2025
- Powerlist – Business Defense, Wisconsin Law Journal, 2025
Engagement
- Member, International Trademark Association, International Amicus Committee
- Milwaukee County Historical Society Board of Directors
- Cornell Club of Wisconsin Board of Directors
Insights

Michael Best Attorney Thomas Agnello Named to Wisconsin Law Journal’s Business Defense Powerlist
Michael Best is proud to announce that Thomas Agnello has been named to the Wisconsin Law Journal’s Business Defense Powerlist. The prestigious recognition highlights Agnello’s exceptional skills in defending and advocating for businesses in high-stake IP litigation.Read
Mar 11, 2025

World Trademark Review 2025
Michael Best’s Trademark practice is again ranked in the 2025 edition of the World Trademark Review: The World’s Leading Trademark Professionals. Additionally, eight of the firm’s trademark attorneys are individually ranked by World Trademark Review.Read
Jan 30, 2025

Trending Topics in IP: Due Diligence for Business Transactions Webinar
Intellectual property is an increasingly critical aspect of any large-scale business transaction. While patents may not always be a part of such transactions, trademarks, copyrights, and trade secrets—as well as technology, with the increasing use of AI, processes, and company know-how—most certainly will be. This webinar will focus on trademark and copyright-related pitfalls often encountered in transactions, and best practices in IP due diligence to help companies avoid such risks, with an emphasis on current copyright and trademark enforcement trends.Watch
Nov 14, 2024
