Jack O'Shea

Associate
Direct: 414-528-8517
Email: joshea@llgmke.com

Biographical

John “Jack” O’Shea is an associate attorney at Laffey, Leitner & Goode LLC. Born and raised in Milwaukee, Jack’s practice is grounded in the values of hard work, integrity and kindness. Naturally curious and intellectually driven, he approaches each client matter with enthusiasm and attention to detail. Jack values collaboration and is focused on contributing to the success of both his clients and the firm. His dedication, careful preparation and detail-oriented approach to advocacy reflects his commitment to delivering meaningful results and achieving justice for those he serves. 

An accomplished graduate of Marquette University Law School, Jack served on the Marquette Law Review editorial board and represented the university in national competitions as a member of the Moot Court Board.  

Practice Areas

Published Works & Presentations

Co-author: ABA Franchising Orlando (2025) 

Professional Admissions, Associations & Honors

Education

Marquette University College of Law/J.D., 2026 

Marquette University/B.S., Finance, 2022 

Associate editor, Marquette Law Review/2025-2026 

Editorial staff member, Marquette Law Review/2024-2025 

General board member, Marquette University College of Law Moot Court/2025-2026 

Intern for Milwaukee District Attorney office/2025-2026

Community

Member, Marquette University Center for Peacemaking/ 2022 

News, Awards & Honors

LLG Named to U.S. News-Best Lawyers "Best Law Firms"
Laffey, Leitner & Goode LLC has been named to U.S. News – Best Lawyers “Best Law Firms” list for 2018.
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LLG Attorneys Honored by Best Lawyers in 2017
LLG partners Jack Laffey, Mark M. Leitner, Joseph S. Goode, and John E. Flanagan have once again been named to the Best Lawyers annual list of top attorneys.
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7 LLG Attorneys Selected to WI Super Lawyers
Seven of our firm’s attorneys have been selected to the 2016 Wisconsin Super Lawyers list
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