John D. "Jack" McNally

John D. "Jack" McNally

recognized lawyers icon Recognized in Ones to Watch since 2026
Awarded Practice Areas
Litigation - Construction Litigation - Real Estate Trusts and Estates
John D. "Jack" McNally
John D. "Jack" McNally
Milwaukee, WI
Works at
O'Neil, Cannon, Hollman, DeJong & Laing SC

20 Best Lawyers awards

O'Neil, Cannon, Hollman, DeJong & Laing SC logo

Biography

John “Jack” McNally is a member of the firm’s Litigation and Trust, Estates and Succession Planning Practice Groups. He focuses his practice on estate planning and probate and trust litigation, as well as a broad range of civil litigation matters. Jack represents individuals, families, and businesses in disputes involving estates, fiduciary duties, and other complex civil issues.

Jack’s background in public service provides him with practical litigation experience and a strong understanding of regulatory and municipal matters. Prior to joining the firm, he served as an Assistant City Attorney for the City of Milwaukee, where he handled business licensing litigation and defended claims against the City. Jack approaches each matter with a strategic, client-focused mindset, working to resolve disputes efficiently while protecting his clients’ interests.

Jack Assists Clients With

  • Estate Planning for Individuals and Families
  • Wills, Trusts, and Powers of Attorney
  • Probate and Trust Litigation
  • Civil Litigation and Dispute Resolution
  • Business and Commercial Litigation
  • Fiduciary and Estate Disputes

Professional Associations & Affiliations

  • State Bar of Wisconsin
  • Eastern District of Wisconsin Bar Association
  • Milwaukee Young Lawyers Association

Awards/Distinctions

  • 2026 Best Lawyers: Ones to Watch®
  • 2025 Super Lawyers Rising Star
  • 2024 Elite Lawyer
  • Pro Bono Honor Society

Community Involvement

  • Pabst Mansion Board of Governors
  • Volunteer, Milwaukee Justice Center

Education

  • Marquette University Law School (J.D.)
  • Marquette University, cum laude (B.A.)
Works at
O'Neil, Cannon, Hollman, DeJong & Laing SC

20 Best Lawyers awards

O'Neil, Cannon, Hollman, DeJong & Laing SC logo

Locations

Education

  • Marquette University, J.D., graduated 2018

Client Testimonials

Awards & Focus

Recognized in Best Lawyers: Ones to Watch® in America 2027 for work in:
  • Litigation - Construction
  • Litigation - Real Estate
  • Trusts and Estates

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