Joel J. Levin

Todd A. Mazur is a lawyer recognized by Best Lawyers in the practice area of Corporate Law. Todd A. practices law in Chicago, Illinois Best Lawyers has recognized Todd A. Mazur 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 Todd A. Mazur is held by other lawyers.

Ana Valenzuela is a lawyer recognized by Best Lawyers in the practice area of Immigration Law. Ana practices law in Chicago, Illinois Best Lawyers has recognized Ana Valenzuela 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 Ana Valenzuela is held by other lawyers.

Monica A. Wallace focuses her practice on complex regulatory and transactional counseling to healthcare organizations, including health systems, hospitals, ambulatory surgery centers, physician groups, dental providers, integrated delivery systems, academic medical centers, DMEPOS and pharmaceutical manufacturers and suppliers, home health agencies, and venture capital and private equity firms and their health-related portfolio companies. Monica is a practice area leader for the Healthcare Re...

John Ratnaswamy founded his own law firm after having served as a co-founder and Partner at a nationally recognized energy boutique law firm. John has spent over 25 years counseling and representing electric and natural gas industry clients, including before utility commissions and on appeal. John has been selected for inclusion in The Best Lawyers in America© from 2010-2026 and was named its 2014 Chicago “Lawyer of the Year” in the field of Energy Law. John also has been rec...

John O’Neil’s legal knowledge, business savvy, and leadership of complex transactions have earned him a reputation as a global leader in private equity fund matters. John heads the Investment Funds Practice Group, the Firm’s leading-edge global platform that provides innovative and bespoke legal strategies to sponsors and funds of all kinds. John is also a member of the Firm's Executive Committee. John has been recognized by Chamber’s Global, Chambers USA, IFLR 1000, L...

Jacqueline M. Vidmar has more than thirty five years of environmental law experience, brings wealth of knowledge to transactional and regulatory matters and disputes. She represents companies in a variety of industries, including manufacturing, public utilities, health care and pharmaceuticals, transportation (rail and pipeline), and real estate. Ms. Vidmar excels in real estate portfolio management, M&A due diligence, contaminated property disputes, remediation and development, defense o...

Ricardo E. Ugarte is a lawyer recognized by Best Lawyers in the practice areas of International Arbitration - Commercial and International Arbitration - Governmental. Ricardo E. practices law in Chicago, Illinois Best Lawyers has recognized Ricardo E. Ugarte since 2012. 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 Ricardo E. Ugarte is held by other lawyers.

A former chief patent counsel to a Fortune 500 communications company with deep first chair trial experience, Thomas Pasternak focuses his practice on patent, trademark, and trade secret litigation, licensing, and prosecution. He protects and defends his clients’ intellectual property rights in district courts throughout the United States, the International Trade Commission (ITC), the Patent Trial and Appeal Board (PTAB), and the Federal Circuit and Seventh Circuit Courts of Appeal. He ...

Barry F. Irwin is a lawyer recognized by Best Lawyers in the practice areas of Copyright Law, Litigation - Intellectual Property, Litigation - Patent, Patent Law and Trademark Law. Barry F. practices law in Chicago, Illinois Best Lawyers has recognized Barry F. Irwin since 2019. 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 Barry F. Irwin is held by other...

Sean W. Bezark focuses his practice primarily on environmental matters for public corporations, privately held companies, banks, lenders, REITs and private equity investment funds. He advises clients on environmental aspects of corporate and real estate transactions, bankruptcy cases, environmental investigations and remediation projects, brownfields development, insurance procurement and risk and cost allocations. He also counsels clients on legal and technical aspects of complex contaminati...