Michael M. "Mike" Marick

Drawing on nearly 40 years of combined experience as a federal prosecutor and defense attorney, Sheldon Zenner expertly navigates his clients through high-stakes matters, including government and internal investigations, regulatory proceedings, all phases of criminal matters and related civil litigation. Sheldon's diverse client base is made up of corporations, high-ranking executives and company owners across a wide range of industries, including financial services, health care and entertain...

Daniel K. Ryan is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - ERISA and Litigation - Insurance. Daniel K., who practices law in Chicago, Illinois, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel K. is held by other top lawyers in the same geographic and legal practice area.

As a partner in the Intellectual Property practice group, Jeff focuses his work on patent litigation and strategic counseling related to pharmaceutical, chemical, biotechnology, electrical engineering, agricultural and food products. A registered patent attorney with four decades of experience, Jeff has successfully represented both patent owners and patent challengers through all stages of federal litigation and appeals. A significant portion of Jeff’s practice includes advising pharma...

Jennifer J. Kalas is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Defendants. Jennifer J., who practices law in Schererville, Indiana, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jennifer J. is held by other top lawyers in the same geographic and legal practice area.

Joe Madonia is leader of the firm’s Environmental Litigation team. For more than 25 years, Joe has defended and counseled clients on a wide array of toxic tort and environmental matters at the local, regional and national levels. Joe delivers strong skills as a litigator, multifaceted trial experience, and the regulatory know-how and scientific depth needed to problem-solve at virtually any level of sophistication or difficulty. His experience includes serving as national trial counsel ...

Timothy R. Ocasek is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Timothy R., who practices law in Chicago, Illinois, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Timothy R. is held by other top lawyers in the same geographic and legal practice area.

Thomas G. Siracusa is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs, Medical Malpractice Law - Plaintiffs, Personal Injury Litigation - Plaintiffs and Product Liability Litigation - Plaintiffs. Thomas G., who practices law in Chicago, Illinois, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Thomas G. is held by other top lawyers in the sa...

Philip A. Bareck has been with Katz Friedman since 1991, became a partner in 2003, and a shareholder in 2007. Currently, he is an Adjunct Professor at IIT Chicago-Kent College of Law teaching Workers' Compensation Law, has been selected as an Illinois Super Lawyer (5% of the attorneys in Illinois), included in Best Lawyers in Workers’ Compensation Law, awarded inclusion in Top Trial Lawyers (American Trial Lawyers Association top 100 Trial Lawyers for Illinois), Top Attorneys in Illinoi...

Ben Whiting is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs. Ben, who practices law in Chicago, Illinois, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ben is held by other top lawyers in the same geographic and legal practice area.

Charles A. Porretta is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs and Personal Injury Litigation - Plaintiffs. Charles A., who practices law in Chicago, Illinois, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Charles A. is held by other top lawyers in the same geographic and legal practice area.