Warren Brent Copple

Charles N. Insler is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Charles N., who practices law in St. Louis, Missouri, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Charles N. is held by other top lawyers in the same geographic and legal practice area.

Tom Clark serves as the firm's Chief Operating Officer and leads the firm’s St. Louis office. His expertise encompasses all aspects of employee benefits programs, including the design, implementation and compliance of retirement plans, health and welfare plans, and executive and incentive compensation arrangements. He also has a robust practice assisting covered service providers in meeting their ERISA compliance needs. Mr. Clark’s vast litigation experience complements the firm&r...

Kari is a founding member of O'Leary, Shelton, Corrigan, Peterson, Dalton & Quillin LLC. Her practice includes all aspects of personal injury litigation, including: catastrophic injuries, many of which result in amputations; wrongful death claims; products claims; premises liability cases; auto and trucking accidents; all-terrain and side by side/utility-task vehicle accidents; forklift accidents; electrocution and power line cases; construction accidents; workplace accidents; and workers...

Throughout his career, Michael Dalton has devoted 100% of his work to fighting on behalf of injury victims and has collected tens of millions in settlements and judgments on behalf of victims and their families. A Missouri native, Michael attended the University of Missouri-Columbia for undergrad and law school. At Mizzou, Michael earned a bachelor’s degree in Political Science and a minor in English. He continued his education at Mizzou Law and was a writer for the Journal of Dispute R...

John Kemppainen has more than 30 years of courtroom experience defending clients in Missouri and Illinois. He is AV-rated by Martindale-Hubbell, recognized as a Missouri Super Lawyer, and has been named one of the Top Lawyers in Missouri by the St. Louis Post Dispatch . His practice includes personal injury, products liability, wrongful death, class actions, and toxic torts, with clients ranging from insurers and corporations to municipalities and individuals. He also serves as National Coord...

Trevor A. Sondag is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Defendants and Product Liability Litigation - Defendants. Trevor A., who practices law in Belleville, Illinois, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Trevor A. is held by other top lawyers in the same geographic and legal practice area.

Melissa Pesce is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Melissa, who practices law in St. Louis, Missouri, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Melissa is held by other top lawyers in the same geographic and legal practice area.

Michelle J. Spirn is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Michelle J., who practices law in St. Louis, Missouri, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michelle J. is held by other top lawyers in the same geographic and legal practice area.

Celynda L. Brasher is a founding shareholder of the firm. She practices in the areas of education, litigation, and labor and employment law. Celynda represents numerous school districts throughout Missouri. She regularly advises boards of education and administrators on matters involving employee hiring, evaluation, remediation, and termination; student rights and discipline; special education; school finance; civil rights; contracts; the Missouri Open Meetings Act; church/state issues; and a...

Mark H. Levison is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Copyright Law. Mark H., who practices law in St. Louis, Missouri, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark H. is held by other top lawyers in the same geographic and legal practice area.