James M. Broeking

Richard L. Sevcik concentrates his practice in exempt organizations and health care law. He has extensive experience in the representation of public charities, tax-exempt health care systems, private foundations and charitable trusts. He is a member of the firm's Pro Bono Committee.

With a reputation for having an in-depth understanding of his client’s businesses and their technologies, Darrick Hooker is a counselor and a litigator who routinely advises clients on a variety of intellectual property issues, with a focus on patents. He also helps protect clients’ trade secrets, trademarks, and copyrights and has a thriving commercial litigation and entertainment law practice. Darrick strives to help his clients identify and manage their global IP assets. He is ...

Attorney Helena Trachtenberg is dedicated to working with individuals facing complex family law issues. Her experience in working with couples has offered her valuable perspectives on the different approaches to marital dissolution. Whether a couple is seeking a traditional litigated divorce, mediated or collaborative law approaches to divorce, Helena Trachtenberg has the experience couples seek. Beyond divorce strategies, Helena offers prenuptial agreement services for engaged couples planni...

Mark Grossmann is global chair of Katten's Corporate practice. Mark knows how to make deals happen. For more than 20 years, he has guided principals and finance sources alike through critical transactions that have helped them grow, compete and realize value. He is known for a refreshingly direct approach that cuts away extraneous issues and gets to the heart of what the parties need. Mark knows that lawyers are often seen as obstacles who can bury the deal in the legal details. He takes a di...

Jeffrey P. Armstrong is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Jeffrey P., who practices law in Chicago, Illinois, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jeffrey P. is held by other top lawyers in the same geographic and legal practice area.

Charles Helsten is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law. Charles, who practices law in Rockford, Illinois, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Charles is held by other top lawyers in the same geographic and legal practice area.

Steven Grimes is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. Steven, 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 Steven is held by other top lawyers in the same geographic and legal practice area.

Peter Sullivan practices in trial and litigation of complex professional liability and commercial litigation cases, including actions against accountants and attorneys, director and officer liability and coverage cases, consumer class action cases and breach of contract cases. Mr. Sullivan also focuses on lender liability suits, real estate litigation, UCC litigation, state and federal securities law claims, RICO claims, business tort litigation and common law fraud actions.

Steve is a partner in the firm’s Litigation Department, where he represents clients in complex civil litigation matters before state and federal courts throughout the country. He has considerable experience with commercial disputes, constitutional challenges, statutory interpretation issues, and defamation and invasion of privacy suits. He is skilled at representing municipalities in cases involving so-called “locally undesirable land uses” such as airports, music amphitheat...

Partner Ryan T. Johnson concentrates his practice in the areas of construction law, professional liability, and complex commercial litigation. Ryan has over 15 years of experience successfully representing clients in construction related matters in Illinois and nationally, including jury and bench trials in state and federal courts as well as arbitration proceedings. In addition to dispute resolution, Ryan also engages in contract negotiations, contracting drafting and business counseling on ...