John M. Wirth

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

John A. Erich is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. John A., who practices law in Milwaukee, Wisconsin, has been recognized since 2003. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John A. is held by other top lawyers in the same geographic and legal practice area.

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

Philip R. O'Brien is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Philip R., 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 Philip R. is held by other top lawyers in the same geographic and legal practice area.

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.

Nick G. Kotsonis has been a shareholder with the firm since 1999 and was appointed to the Board of Directors as of January 1, 2014. His practice areas include employment litigation/worker’s compensation, business and commercial litigation, insurance coverage litigation, personal injury, premises liability, environmental/toxic tort claims and risk management.

Represents developers, retailers and end users in all phases of real estate development, including land planning, entitlements, acquisitions, financing, construction and leasing.

Leila Sahar is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Leila, 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 Leila is held by other top lawyers in the same geographic and legal practice area.

Richard W. Donner is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Richard W., 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 W. is held by other top lawyers in the same geographic and legal practice area.

Terry Johnson is a Shareholder and Chair of the firm’s Professional Liability Section. Terry has tried hundreds of cases to a verdict in matters ranging from complex legal malpractice cases to major construction defect disputes to major personal injury actions. Terry has had an impact in the development of Wisconsin law through appellate work in a wide spectrum of areas. Terry was asked to serve by the Chief Justice of the Wisconsin Supreme Court on the Office of Lawyer Regulation (&ldq...