William J. "Bill" Mitchell

A registered patent attorney with decades of experience, Tom helps domestic and global businesses develop, protect, and manage complex intellectual property portfolios. He has built longstanding client relationships, often spanning 20-30 years, by prioritizing clear communication and ensuring clients feel informed and valued throughout every matter. Tom’s practice has evolved from litigation to a strong emphasis on patent prosecution and trademark protection, reflecting the growing impo...

With over 30 years of experience, Bruce I. Ettelson, P.C. is widely recognized as a leading private investment funds lawyer who has been on the forefront of the industry's evolution since its early years. He is the founder of the Firm's dedicated Investment Funds Group, which was ranked in 2021 by Chambers & Partners as Tier 1 in the U.S., Asia-Pacific, United Kingdom and globally. His practice focuses on structuring and forming premier private equity funds and their management companies....

John V. Kalantzis is a complex personal injury attorney whose practice spans aviation law, wrongful death, and serious, multi-jurisdictional injury cases. He represents individuals and families in high-stakes litigation involving corporate negligence and systemic failures, combining strategic advocacy with a thoughtful, client-centered approach to help them navigate life’s most difficult circumstances. As a member of the firm's nationally recognized aviation practice, John has advocated...

Aurelija Fitzpatrick is a lawyer recognized by Best Lawyers in the practice areas of Family Law and Family Law Mediation. Aurelija practices law in Chicago, Illinois Best Lawyers has recognized Aurelija Fitzpatrick since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Aurelija Fitzpatrick is held by other lawyers.

Matthew F. Bergmann is a lawyer recognized by Best Lawyers in the practice area of Health Care Law. Matthew F. practices law in Chicago, Illinois Best Lawyers has recognized Matthew F. Bergmann since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Matthew F. Bergmann is held by other lawyers.

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 ...

Adria E. Mossing is a lawyer recognized by Best Lawyers in the practice area of Personal Injury Litigation - Plaintiffs. Adria E. practices law in Chicago, Illinois Best Lawyers has recognized Adria E. Mossing since 2022. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Adria E. Mossing is held by other lawyers.

Ian H. Fisher represents commercial clients ranging from small entrepreneurs to Fortune 100 companies. Ian has successfully litigated cases involving real estate, antitrust, trade secret misappropriation, restrictive covenant, consumer, contract, and business tort disputes. Ian has substantial experience defending against class action and navigating multidistrict litigation proceedings. He has successfully defended on appeal many of his trial court victories. He is skilled at identifying stra...

Kwabena A. Appenteng is a lawyer recognized by Best Lawyers in the practice areas of Employment Law - Management and Labor Law - Management. Kwabena A. practices law in Chicago, Illinois Best Lawyers has recognized Kwabena A. Appenteng since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Kwabena A. Appenteng is held by other lawyers.

Mr. Leavitt is a Founding Partner with Grund & Leavitt. He has litigated a number of high profile trials and appeals in both federal and state courts.Before becoming a partner in the firm, he served as a judge in the Circuit Court of Cook County, Illinois and as a justice on the Illinois Appellate Court. This followed 20 years in a successful private practice. The Chicago Bar Association remarked when evaluating him that "he enjoys impeccable credentials" and the Chicago Council of Lawyer...