Lippes Mathias partners Brian C. Mahoney, Colleen Flynn Goss and Brendan P. Kelleher have been named to the 2026 edition of Irish Voice Newspaper’s Irish Legal 100. 

The Irish Legal 100 recognizes some of the most accomplished and distinguished lawyers of Irish descent from across America. The honorees were invited to celebrate their selection at a reception at the Washington, D.C., home of Ireland’s Ambassador to the United States. 

All three attorneys are regularly recognized on the list. This is the fifth consecutive year on the Irish Legal 100 for Goss and the sixth consecutive year for Kelleher. Mahoney, first named in 2024, is on the list for the third consecutive year. 

About Colleen Flynn Goss 

Colleen Flynn Goss is a well-established attorney who counsels domestic and international clients on a variety of trademark and copyright matters. Her practice encompasses advising clients on the selection, clearance and adoption of new trademarks, prosecution of applications, registration, maintenance and enforcement of trademarks and domain names, as well as providing counsel on transactional matters and disputes related to trade secrets, false advertising and trademarks. 

Goss works closely with clients to understand their risk tolerance and develop practical strategies for establishing their brands, maintaining and enforcing their IP assets, and achieving their business objectives. She is also experienced in advising clients on complex transactions and disputes related to trade secrets, false advertising, trademarks, and copyrights. Goss strives to provide practical, cost-effective and sound advice that enables her clients to make effective use of their trademarks. 

Overseeing and managing the worldwide trademark assets of a major health care provider is the keystone of Goss’ practice. Her other varied clients include universities, consumer product and industrial manufacturing companies, and medical device manufacturers. She has also gained extensive international exposure through representation of trademark applicants based outside the United States. 

Goss is an actively involved member of the International Trademark Association (INTA), most recently as chair of the organization’s Publication Committee and currently a member of the Professional Development Committee. She is rated AV Preeminent by Martindale-Hubbell and has been selected for inclusion in the World Trademark Review 1000 – The World’s Leading Trademark Professionals every year since 2018. She has taught trademark law as an adjunct professor at Case Western Reserve University School of Law. 

Goss previously worked in private practice for a large Cleveland law firm concentrating on mergers, acquisitions and securities law and has a decade of experience serving as in-house counsel for several Cleveland-based, publicly traded corporations. 

About Brendan P. Kelleher 

Brendan P. Kelleher’s practice focuses on the representation of employers in all areas of labor and employment law, including the negotiation of employment and separation agreements, counseling employers regarding their obligations under federal and New York State labor and employment laws, and representing employers before federal and state courts, the Equal Employment Opportunity Commission, the New York State Division of Human Rights, the U.S. and New York State departments of labor, and other federal and state agencies. Kelleher also regularly conducts workplace investigations for employers, including investigations of allegations of discrimination, harassment, retaliation and other alleged employee misconduct. 

His practice includes a focus on representing management in all areas of labor relations, including in collective bargaining, grievances, arbitrations and before the National Labor Relations Board. 

Drawing on his experiences as the general counsel to the City of Buffalo School District and his representation of school districts for more than two decades, Kelleher also devotes a significant portion of his practice to representing and counseling school districts in all areas of their operations and the unique challenges they face. 

Prior to practicing law, Kelleher served on the foreign policy staff in the Washington, D.C., office of U.S. Sen. Edward M. Kennedy. 

About Brian C. Mahoney 

Brian C. Mahoney advises clients on matters related to corporate compliance and government investigations as well as federal and New York state regulatory actions. He represents individuals, businesses and institutions in both civil and white-collar criminal matters, and has tried more than 85 civil and criminal jury trials to verdict. In addition, he advises clients with NCAA matters, including compliance and student-athlete eligibility issues. 

Prior to entering private practice, Mahoney served as chief of the Felony Trial Bureau for the Erie County District Attorney, the largest upstate prosecutor’s office north of Westchester County. In that position, he supervised all felony trial lawyers and oversaw the investigations and trials. In addition, he personally handled serious felony matters from investigation through trial. Mahoney successfully tried the first criminal case in Erie County where the only source of identification consisted of DNA evidence. In another trial, he obtained a conviction which at the time resulted in the longest sentence ever handed down in the history of Erie County for a non-homicide criminal conviction. 

Mahoney has served as a faculty advisor at the National District Attorneys Advocacy Center in Columbia, South Carolina, the premier facility for training of federal and state civil and criminal lawyers in the country. As a faculty advisor, Mahoney specifically instructed attorneys throughout the nation on numerous aspects of trial practice. 

About Lippes Mathias LLP 

Lippes Mathias is a full-service law firm ranked among the top 200 law firms in the U.S. by size, with nearly 230 attorneys serving clients regionally, nationally, and internationally. With offices in Buffalo, Clarence, Albany, Long Island, New York, Rochester, Syracuse, and Saratoga Springs, N.Y.; Greater Toronto Area; Chicago, Ill.; Jacksonville, Tampa Bay, and West Palm Beach, Fla.; Cleveland, Ohio; San Antonio, Texas; Oklahoma City, Okla. and Washington, D.C., the firm represents publicly and privately-owned companies, private equity and venture capital firms, independent sponsors, real estate developers, financial institutions, municipalities, governmental entities, and individuals.