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 Attorneys Named to SuperLawyers List in 2019
Super Lawyers just published its lists and the attorneys at Laffey, Leitner & Goode LLC are at it again. Six attorneys at the firm made this year’s list with Jack, Mark, Joe once again being acknowledged for 10+ years of inclusion.
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Laffey, Leitner & Goode LLC Marks Third Consecutive Inclusion on “Best Law Firms” List
Laffey, Leitner & Goode LLC is once again celebrating being named to US News-Best Lawyers “Best Law Firms” list. 2020 is the third straight year that LLG has made the list of America’s most respected law firms.
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LLG Attorneys Selected to Best Lawyers® in 2019
Four partners of Laffey, Leitner & Goode LLC have been named to Best Lawyers’ annual list of the nation’s top attorneys. In a milestone year, three are celebrating significant anniversaries along with their inclusion this year.
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