Mark J. Diliberti

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

Christine Esser is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Christine, who practices law in Sheboygan, Wisconsin, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christine is held by other top lawyers in the same geographic and legal practice area.

Greg represents clients in the prosecution and defense of complex commercial litigation. His extensive experience in commercial litigation has prepared him to successfully represent large corporations as well as small businesses and individuals. Greg also has extensive experience representing individuals in inheritance litigation. He has successfully litigated many will contests and trust disputes throughout Wisconsin. Greg has accomplished tremendous results on behalf of trustees, personal r...

Travis R. Mueller is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Mergers and Acquisitions Law. Travis R., 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 Travis R. is held by other top lawyers in the same geographic and legal practice area.

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

Allen C. Schlinsog, Jr. is a shareholder, chair of the firm's Litigation Practice and chair of the Product Liability and Safety Practice Group. His practice focuses on defense of the pharmaceutical and medical device industry. Al has represented drug and device companies in significant class actions, product liability and mass tort proceedings. He also regularly defends catastrophic injury cases involving a wide variety of products in highly regulated industries, including mining equipment, c...

Jon and his firm have handled every kind of injury case you can imagine: auto and motorcycle collisions, product liability, civil litigation, nursing home neglect, bicycle and pedestrian accidents, and animal attacks.

Nancy Bonniwell is a Shareholder focusing her practice on estate, business succession and marital property planning, estate administration and business law. She is a frequent presenter on the subjects of estate planning, business succession planning and charitable giving.

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.

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, and intellectual property 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 Wisconsin Super Lawyers for eleven years in a row. Prior to joining O’Neil, Cannon, Hollman, DeJong & Laing S.C., Jo...