Sali G. Wissa

Tom is a Shareholder and Chairs the Patents and Intellectual Property Sections. An experienced attorney most active in patent prosecution, portfolio management and providing opinions of counsel, Tom drafts and prosecutes U.S. and foreign patent applications; renders non-infringement, validity, patentability and inventorship opinions; drafts and interprets license, indemnification, employment and non-complete agreements; prepares and prosecutes trademark and copyright registrations; and counse...

Peter H. Lieberman is Co-Chair of the Chicago Corporate & Securities Practice. He has more than 20 years of broad experience in mergers and acquisitions, public company, and hedge fund matters, private equity, start-up and venture capital, and related securities regulation issues. Peter brings to his work a diverse transactional background, including a decade-long involvement in hedge fund transactions and securities trading and hedging issues. He has been involved in scores of PIPE and r...

Craig Thorstenson concentrates his practice in the litigation of employment disputes and providing related counseling. Craig Thorstenson concentrates his practice in the litigation of employment disputes and providing related counseling. His experience includes defending numerous WARN Act, FLSA and Title VII class actions, prosecuting and defending actions over restrictive covenants, and handling complex labor arbitrations. He regularly acts as "in-house" employment counsel for several compan...

Rita M. Powers is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Rita M., 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 Rita M. is held by other top lawyers in the same geographic and legal practice area.

Ross O. Silverman is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Ross O., who practices law in Chicago, Illinois, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ross O. is held by other top lawyers in the same geographic and legal practice area.

Allen J. Guon is a top attorney recognized by Best Lawyers in the practice area(s) of Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law and Litigation - Bankruptcy. Allen J., 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 Allen J. is held by other top lawyers in the same geographic and legal practice area.

Known both as a gifted leader and a consummate team player, Joe Cancila is a highly regarded, experienced, and tenacious litigator who has dedicated his career to defending clients in complex commercial class actions. He is a creative strategist, thorough investigator, and effective communicator—all qualities that make him a worthy adversary in and out of the courtroom. And as the leader of many practice teams, he has mastered the art of working collaboratively with co-counsel to best a...

David O. Barrett is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. David O., 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 David O. is held by other top lawyers in the same geographic and legal practice area.

James J. Lukas, Jr. is Co-Chair of the Chicago Intellectual Property & Technology Practice. He focuses his practice on intellectual property litigation with a particular emphasis on patent litigation and related client counseling. He has experience with complex patent litigation cases in federal district courts throughout the country, including both enforcing patent rights and defending against charges of infringement on behalf of clients. He has first-chaired trials and claim constructio...

Jordan Klein’s broad-based trust and estate practice encompasses all aspects of estate planning, trust and estate administration and settlement, wealth transfer, philanthropy and fiduciary counseling services. His clients include corporate executives, families with dynastic wealth, privately held business owners, professionals, fund managers, family offices and private foundations. Jordan has significant experience designing creative solutions to achieve his clients’ estate planni...