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Joseph Gumina is a shareholder at O’Neil Cannon and the Past Chair of O’Neil Cannon’s Labor & Employment Practice Group. Joe is licensed to practice law in the states of Illinois and Wisconsin. Joe has extensive experience representing management in a vast array of employment matters ranging from traditional labor matters involving labor negotiations and unfair labor practice charges to helping employers navigate the complexities of state and federal fair employment laws...

Jill Munson is a top attorney recognized by Best Lawyers in the practice area(s) of Professional Malpractice Law - Defendants. Jill, who practices law in Milwaukee, Wisconsin, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jill is held by other top lawyers in the same geographic and legal practice area.

Although he was born, raised, and offices in southeastern Wisconsin, Tim Trecek has earned a national reputation as a successful plaintiff’s trial lawyer. Mr. Trecek’s successes have been so noteworthy that they have been chronicled in papers throughout the United States. Mr. Trecek’s notable cases have been reported in the Boston Globe, the Washington Post, the Fort Worth Star Telegram, the Minneapolis Star Tribune, the San Francisco Chronicle and dozens of other publicatio...

For over forty-five years, Dennis has advised business owners in all areas of contract and corporate law. He focuses primarily on assisting his clients with business succession planning, estate planning, contract and corporate law—with an emphasis on mergers and acquisitions, and shareholder/partner disputes. One of the founding members of the firm in 1973, Dennis has assisted hundreds of business owners and their companies in structuring successful business succession plans. These comp...

David G. Peterson is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. David G., who practices law in Waukesha, Wisconsin, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David G. is held by other top lawyers in the same geographic and legal practice area.

Ryan S. Stippich is a shareholder in the firm’s Litigation Practice, as well as a member of the White Collar Litigation and Corporate Compliance Group and Reinhart Institutional Investor Services. He represents clients in a wide range of complex civil and criminal matters at both the trial and appellate levels. Ryan focuses his litigation practice in the areas of securities litigation, shareholder disputes, professional liability litigation, other business torts and class actions. Ryan ...

Laurie A. Petersen is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Laurie A., who practices law in Milwaukee, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laurie A. is held by other top lawyers in the same geographic and legal practice area.

James M. Sosnoski is an attorney in Meissner Tierney’s litigation practice group. He represents businesses and insurers in a wide variety of matters, including insurance coverage, environmental litigation business and corporate disputes, and employment disputes and non-competition agreements. James also specializes in handling all aspects of civil appeals. Prior to joining the firm, James served as Term Law Clerk to Justice Rebecca G. Bradley, Supreme Court of Wisconsin, and the Honorab...

Jason leads O’Neil Cannon’s Corporate Practice Group. He advises and represents individuals, businesses, and banks on a variety of corporate, banking, and business-related issues, including mergers and acquisitions, commercial loan transactions, corporate issues, contract negotiation and preparation, and business entity selection and formation. Jason Assists Clients With Mergers and acquisitions Complex commercial loan transactions for lenders and borrowers Corporate matters, incl...

Larri J. Broomfield is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Health Care Law. Larri J., who practices law in Milwaukee, Wisconsin, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Larri J. is held by other top lawyers in the same geographic and legal practice area.