O’Neil Cannon is pleased to announce that Sabrina Dornan has joined the firm. Dornan focuses her practice on estate planning, trust administration, probate, and business succession matters, assisting individuals and families in developing comprehensive estate plans and guiding clients through probate administration. She is licensed to practice law in Wisconsin and Illinois.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm focused on meeting the diverse legal needs of businesses and their owners. Our experienced attorneys work with businesses at every stage of the business life cycle, helping them start, grow, and successfully transition. We also represent businesses and individuals in a wide range of other matters, including litigation, tax and estate planning, and family law. For more information about the services we provide, please visit our website.

Grant Killoran was recently elected to serve as the Wisconsin State Delegate to the American Bar Association.

State Delegates are elected by the ABA members in a given state and maintain relationships between state and local bars and the ABA. State Delegates serve as members of the ABA’s Nominating Committee and vote to elect ABA officers and most members of the ABA Board of Governors. Additionally, State Delegates serve as Chair of their state’s Delegation to the ABA House of Delegates, the Association’s governing and policy-making body structured to reflect the legal profession in the United States.

Grant previously served as a member of the ABA Board of Governors from 2021-2024 and as a member of the ABA House of Delegates from 1997-1999, 2003-2009, and 2014-2024.

Grant is a shareholder and past Chair of O’Neil Cannon’s Litigation Practice Group. He has diverse trial experience, focusing on complex business and health care disputes.

O’Neil Cannon is proud to announce that attorneys Doug Dehler, Grant Killoran, Dean Laing, Greg Lyons, Patrick McBride, Joe Newbold, Steve Slawinski, and Christa Wittenberg have been selected as Benchmark Litigation Stars in the 19th edition of Benchmark Litigation.

Based on extensive research and feedback from peers and clients, Benchmark Litigation Stars are recognized as the nation’s most respected and accomplished litigation practitioners. Inclusion as a Benchmark Litigation Star reflects each attorney’s outstanding reputation, deep litigation experience, and consistent success on behalf of clients.

Benchmark Litigation is a leading guide to the world’s foremost litigation firms and lawyers, widely relied upon by in-house counsel and legal professionals nationwide.

O’Neil Cannon is pleased to welcome Max Stephenson to its Family Law practice group. Stephenson helps clients navigate the legal and emotional complexities of family transitions, including divorce, child custody, paternity, post-judgment modifications, guardianships, and injunctions. Known for his approachable style and practical, personalized strategies, he also brings deep experience in LGBTQ+ family law. His commitment to clients and the community is reflected in his leadership and volunteer work with organizations such as the American Cancer Society and the LGBT Chamber of Wisconsin.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm dedicated to serving the wide-ranging needs of businesses and their owners. We represent corporations, institutions, partnerships, and closely held companies at every stage of the business life cycle, helping them start, grow, and transition from one generation to the next. In addition to our strong focus on business law and civil litigation, we assist business owners with their personal legal needs, including tax and estate planning and family law.

Each year, Super Lawyers surveys the State of Wisconsin’s 15,000 attorneys and judges, seeking to recognize the State’s top attorneys. Recently, Super Lawyers published its lists for 2025, which include the Top 10 Attorneys in Wisconsin, Top 50 Attorneys in Wisconsin, Top 25 Attorneys in Milwaukee, Super Lawyers (consisting of the top 5% of attorneys in Wisconsin), and Rising Stars (consisting of attorneys who are 40 years old or younger or who have been in practice for 10 years or less).

Super Lawyers, who previously referred to the firm as “the Milwaukee mid-sized powerhouse,” recognized twenty-eight of our attorneys.

Those attorneys are the following:

• Dino Antonopoulos:
  • Super Lawyer
• Nick Chmurski:
  • Rising Star
• Doug Dehler:
  • Super Lawyer
• Jim DeJong:
  • Super Lawyer
• Seth Dizard:
  • Top 50 Attorneys in Wisconsin
  • Top 25 Attorneys in Milwaukee
  • Super Lawyer
• Maura Falk:
  • Rising Star
• Pete Faust:
  • Top 50 Attorneys in Wisconsin
  • Super Lawyer
• John Gehringer:
  • Super Lawyer
• Joseph Gumina:
  • Super Lawyer
• Jessica Haskell:
  • Rising Star
• Mike Kennedy:
  • Rising Star
• Grant Killoran:
  • Super Lawyer
  • Top 50 Attorneys in Wisconsin
  • Top 25 Attorneys in Milwaukee
• JB Koenings:
  • Super Lawyer
• Dean Laing:
  • Top 10 Attorneys in Wisconsin
  • Top 50 Attorneys in Wisconsin
  • Top 25 Attorneys in Milwaukee
  • Super Lawyer
• Trevor Lippman:
  • Rising Star
• Greg Lyons:
  • Super Lawyer
• Patrick McBride:
  • Super Lawyer
• Jason Meehan:
  • Rising Star
• Joe Newbold:
  • Super Lawyer
• Erica Reib:
  • Rising Star
• Chad Richter:
  • Super Lawyer
• Ryan Riebe:
  • Rising Star
• John Schreiber:
  • Super Lawyer
• Jason Scoby:
  • Super Lawyer
• Steve Slawinski:
  • Super Lawyer
• Kelly Spott:
  • Rising Star
• Christa Wittenberg:
  • Rising Star

Super Lawyers is a national rating service that rates attorneys in all 50 states. The selection process utilized by Super Lawyers is multi-phased and includes independent research, peer nominations, and peer evaluations. One court recently had this to say about Super Lawyers:

“[T]he selection procedures employed by [Super Lawyers] are very sophisticated, comprehensive, and complex.  It is abundantly clear . . . that [Super Lawyers does] not permit a lawyer to buy one’s way onto the list, nor is there any requirement for the purchase of any product for inclusion in the lists or any quid pro quo of any kind or nature associated with the evaluation and listing of an attorney or in the subsequent advertising of one’s inclusion in the lists.”

We are proud to be one of the few firms in Wisconsin with more than 50% of its attorneys recognized by Super Lawyers.

O’Neil Cannon is pleased to announce that Karen Tidwall has joined the firm as a member of its Litigation Practice Group. A veteran litigator and trusted legal advisor with more than 30 years of experience, Tidwall represents businesses, individuals, fiduciaries, and government entities in complex civil matters. Her practice focuses on business and commercial disputes, fiduciary and probate controversies, and matters involving municipal law. Before joining O’Neil Cannon, Tidwall served as Deputy Corporation Counsel for Milwaukee County and spent nearly two decades as a partner in a national law firm.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm dedicated to serving the wide-ranging needs of businesses and their owners. We represent corporations, institutions, partnerships, and closely held companies at every stage of the business life cycle, helping them start, grow, and transition from one generation to the next. In addition to our strong focus on business law and civil litigation, we assist business owners with their personal legal needs, including tax and estate planning and family law.

O’Neil Cannon has been recognized regionally in the 2026 edition of Best Law Firms^®, ranked by Best Lawyers, in 18 practice areas, including a newly added category: Banking and Finance Law.

• Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law
• Banking and Finance Law
• Business Organizations (including LLCs and Partnerships)
• Commercial Litigation
• Construction Law
• Corporate Law
• Employment Law – Management
• Litigation – Bankruptcy
• Litigation – Health Care
• Litigation – Insurance
• Litigation – Labor and Employment
• Litigation – Real Estate
• Mergers and Acquisitions Law
• Personal Injury Litigation – Plaintiffs
• Product Liability Litigation – Defendants
• Real Estate Law
• Securities / Capital Markets Law
• Trusts and Estates Law

Firms included in the 2026 Best Law Firms^® list are recognized for professional excellence based on ratings from clients and peers.

O’Neil Cannon is pleased to announce that Ben Crockett has joined O’Neil Cannon’s Business Law and Real Estate and Construction Practice Groups. Drawing on his experience as a municipal attorney, Crockett helps clients navigate complex regulatory frameworks with practical, solution-oriented advice. He has represented municipalities throughout Wisconsin as outside counsel, drafted zoning ordinances and development agreements, and advised local governments on permitting and real estate issues. Crockett is a member of the State Bar of Wisconsin, Milwaukee Bar Association, and Ozaukee County Bar Association. He also serves as Secretary of the Board for Hope Center WI. We are pleased to welcome Crockett to the firm.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm that focuses on meeting the many needs of businesses and their owners. Our experienced attorneys work with businesses and their owners at all stages of the business life cycle, helping them start, grow, and transition their businesses. We also assist business owners with their personal legal needs, including tax and estate planning, and family law. For more information about the services we provide, please visit our website.