Andrew J. "Andy" Guzikowski

Troy E. Giles is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Troy E., 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 Troy E. 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.

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...

John T. Reichert is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law and Financial Services Regulation Law. John T., who practices law in Milwaukee, Wisconsin, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John T. is held by other top lawyers in the same geographic and legal practice area.

Zachary Flood is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance and Litigation - Labor and Employment. Zachary, 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 Zachary is held by other top lawyers in the same geographic and legal practice area.

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.

William Invie Shroyer is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Real Estate Law. William Invie, who practices law in Milwaukee, Wisconsin, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William Invie is held by other top lawyers in the same geographic and legal practice area.

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...

Grant Killoran is a shareholder at O’Neil Cannon and the Past Chair of its Litigation Practice Group. He has significant and diverse trial experience representing clients in Wisconsin State and Federal Courts, and courts around the country, focusing on complex business, health care and employment law disputes. Grant also devotes a portion of his practice to arts and entertainment law, with an emphasis on the music industry. Grant is listed in The Best Lawyers in America® in the prac...

Mark Foley is a Shareholder with more than 40 years experience meeting the complex business and legal needs of clients ranging from individual business owners to industry trade associations and Global 500 companies. Mark has successfully tried cases before judges and juries in federal and state courts, represented debtors and creditors in bankruptcy courts throughout the United States, and arbitrated matters before AAA and NASD panels. He has directed and conducted the nationwide defense of r...