Craig A. Mastantuono

Chad is a shareholder and member of the firm’s Business Law Practice Group. His practice focuses on working with privately held businesses and their owners, acting as corporate counsel to help them with the various legal issues they face in operating and expanding their businesses. As part of his practice, Chad has considerable experience in Mergers & Acquisitions and frequently works with businesses on ownership transition events. He prides himself on providing efficient, practical...

Jacob S. Sosnay is a top attorney recognized by Best Lawyers in the practice area(s) of Civil Rights Law, Litigation - Insurance and Personal Injury Litigation - Defendants. Jacob S., 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 Jacob S. is held by other top lawyers in the same geographic and legal practice area.

Michael J. Gentry is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Michael J., 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 Michael J. is held by other top lawyers in the same geographic and legal practice area.

Richard Orton is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Litigation - Construction, Litigation - Insurance, Personal Injury Litigation - Defendants and Product Liability Litigation - Defendants. Richard, who practices law in Milwaukee, Wisconsin, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Richard is held by other top lawyers in the same geographic and leg...

Shareholder Michael J. Cohen has more than 25 years of experience in complex commercial litigation in federal and state courts. His proven record of numerous favorable verdicts at the trial and appellate levels has earned him a reputation as one of Wisconsin’s preeminent business litigators. For many years, Mike has been recognized by members of the Wisconsin bar and judiciary as one of the top lawyers in the state. Mike concentrates his practice on complex commercial litigation includi...

JB leads O’Neil Cannon’s Business Law Practice Group and is a United States Air Force Veteran. He works with and advises clients on a wide range of business law matters, including form of entity selection and initial capitalization, raising funds through private equity offerings, securities compliance and broker/dealer matters, mergers and acquisitions, contract preparation and negotiation, and software, technology, and IP matters. JB Assists Clients With Mergers, acquisitions, an...

Patrick represents his clients in the prosecution and defense of many types of civil litigation matters, primarily in the areas of commercial and business litigation, torts, and complex defense litigation. He also has significant experience advising clients in the area of insurance coverage and the defense of professional claims. His extensive experience in commercial litigation has permitted him to successfully represent large multinational corporations in both state and federal courts acros...

Dave Cisar Co-Chairs the Banking and Commercial Finance Section. He draws on his 35 years of experience to counsel businesses on governance, financing, contracting, real estate, acquisitions and strategic planning. Dave has a strong focus on the Uniform Commercial Code (“UCC”) and represents financial institutions and businesses in all aspects of commercial finance and other commercial transactions including terms and conditions of sales, commercial loan agreements, inter-creditor...

Timothy J. Kamke is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Timothy J., who practices law in Milwaukee, Wisconsin, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Timothy J. is held by other top lawyers in the same geographic and legal practice area.

Jim’s practice focuses on representing privately held businesses and their owners on the wide variety of legal matters that may arise. This includes extensive experience with significant corporate transactions such as purchases and sales of businesses, complex contractual matters, and planning for business succession. In his practice, Jim works with clients across a wide range of industries, including fintech, manufacturing, distribution, and professional services. Jim has a unique pers...