John A. "Jack" Kaiser

Joe is the chair of the firm’s Litigation Practice Group. He manages a variety of complex cases involving software class actions, real estate, products liability, banking, intellectual property, and anti-trust matters. He has extensive experience representing both large and small plaintiffs and defendants in challenging civil litigation. He has been selected as a member of the Wisconsin Super Lawyers for six years in a row. Prior to joining O’Neil Cannon, Joe was an associate at t...

Shannon Corallo is a Family Law attorney at Karp & Iancu SC in Milwaukee, Wisconsin. She works with individuals and families facing challenging legal matters, providing practical guidance and straightforward communication throughout every stage of the process. Shannon understands that no two family law cases are alike, and she takes the time to help clients understand their options, responsibilities, and potential outcomes so they can make informed decisions. Known for her thoughtful and ...

Lawrence Drabot is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance and Product Liability Litigation - Defendants. Lawrence, who practices law in Milwaukee, Wisconsin, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lawrence is held by other top lawyers in the same geographic and legal practice area.

Sara C. Mills-Flood is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Litigation - Insurance and Professional Malpractice Law - Defendants. Sara C., 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 Sara C. is held by other top lawyers in the same geographic and legal practice area.

Sarah Kaas is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Sarah, 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 Sarah is held by other top lawyers in the same geographic and legal practice area.

Joseph A. Kromholz is one of the founding shareholders of Ryan Kromholz & Manion, S.C., located in Brookfield, Wisconsin. The firm, which traces its roots back to 1873, was formed in 1998 and practices in all areas of intellectual property law including related litigation. Mr. Kromholz is registered to practice before the United States Patent and Trademark Office and admitted to practice in the United States District Court for the Eastern and Western Districts of Wisconsin and before seve...

John Sikora is a Shareholder representing clients in tax planning, tax controversies and the buying and selling of businesses and real estate with a particular focus on corporate, partnership and other business matters. John is an adjunct professor of law at Marquette University Law School, where he has taught the tax practice and procedure and corporate income tax courses. John has also taught the taxation of partnerships and S corporations course to graduate accounting degree candidates at ...

Jon Levine has a national practice focusing on representing employers in all areas of labor-management relations, including litigation before the National Labor Relations Board and in state and federal courts. He also has significant experience with: The National Labor Relations Act Union organizing campaigns Collective bargaining Labor arbitration Title VII The Americans with Disabilities Act The Age Discrimination in Employment Act The Wisconsin Fair Employment Act Jon’s notable succe...

Kyle W. Engelke is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Municipal. Kyle W., who practices law in Madison, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kyle W. is held by other top lawyers in the same geographic and legal practice area.

Robert L. Jaskulski is a shareholder at the law firm, practicing in the firm’s Milwaukee, Waukesha and West Bend offices, and is managing partner of the firm’s Waukesha office. Mr. Jaskulski’s emphasis of law practice is personal injury litigation throughout the State of Wisconsin and the United States. Mr. Jaskulski’s practice involves a wide range of cases, including medical malpractice, products liability, insurance bad faith and motor vehicle accidents. Mr. Jaskuls...