Katherine Metzger

Nate Johnson is a Shareholder and Co-Chair of the General Litigation Section. His practice focuses on insurance defense claims, product liability, toxic tort, strategic risk and crisis management. Nate has successfully tried numerous cases to verdict throughout Wisconsin. Nate has significant experience litigating cases in the following areas: Products liability Insurance coverage Business/Commercial disputes Construction Personal injury Wrongful Death Premise liability Professional liability

Scott is a member of the firm’s Board of Directors, serves as Managing Shareholder of the Metro-Milwaukee offices, and chaired the Corporate and Business Law Team for eight years. He has been named a leading Wisconsin business transactions and corporate attorney by Law & Politics and Milwaukee Magazine for multiple years. Scott represents a wide variety of businesses and their owners, senior management, investors and lenders in mergers and acquisitions, divestitures, business succes...

Aaron H. Aizenberg is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Aaron H., who practices law in Milwaukee, Wisconsin, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aaron H. is held by other top lawyers in the same geographic and legal practice area.

Benjamin R. Prinsen is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Benjamin R., who practices law in Milwaukee, Wisconsin, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Benjamin R. is held by other top lawyers in the same geographic and legal practice area.

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...

Lucas J. Pagels is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Lucas J., 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 Lucas J. is held by other top lawyers in the same geographic and legal practice area.

Mark Malloy is a trial lawyer who represents businesses in all types of commercial litigation, primarily advising companies in the areas of insurance coverage, extra-contractual liability, and professional liability. Mark is licensed in Wisconsin, Minnesota, and Illinois, and various federal courts. He represents companies in litigation across the country. Clients contact Mark for analysis and opinions relating to complex insurance coverage issues for both personal and commercial lines. In pa...

Mark A. Cameli is a top attorney recognized by Best Lawyers in the practice area(s) of Bet-the-Company Litigation, Commercial Litigation and Litigation - Securities. Mark A., who practices law in Milwaukee, Wisconsin, has been recognized since 2011. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark A. is held by other top lawyers in the same geographic and legal practice area.

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

Randy Nelson is a Shareholder focusing his practice on estate planning, advising family businesses, tax planning, trust administration and probate. He is a Certified Public Accountant and was an Adjunct Professor at Marquette University Law School where he taught estate planning for over 30 years. He is a frequent speaker at continuing education courses for lawyers and CPAs on the subjects of estate planning and tax planning. He is the author of the chapter “Estate Planning for Owners o...