Lennox Mark

John is a nationally recognized banking attorney who advises financial institutions on regulatory, governance, and investigative matters. He regularly provides focused training sessions to boards and management on a wide range of legal and risk management topics. Working at the forefront of banking law and regulation, John is a thought leader in the field, primarily through teaching, writing, and frequent media interviews. As the Regulatory Section Leader of Barack Ferrazzano’s Financia...

Tom represents clients in patent and trademark prosecution, intellectual property litigation, and post-grant patent challenges before the Patent Trial and Appeal Board (PTAB). Tom has a broad base of experience in various technological and business areas, particularly in pharmaceutical, biotechnology, chemical and medical device inventions. He drafts invalidity opinions, investigates freedom to operate, counsels on strategic portfolio management, and conducts due diligence investigations prio...

Stephanie S. McCann focuses her practice on corporate finance. She represents private equity groups, commercial lending institutions and major public and private companies in connection with the structuring, negotiation and documentation of domestic and international secured and unsecured financing transactions, including senior, mezzanine and subordinated debt transactions, acquisition financings, recapitalizations, loan workouts and restructurings. Stephanie is the chair of the Firm’s...

Pat Nash is a partner in the Restructuring Group of Kirkland & Ellis LLP. He represents a variety of clients in complex business reorganizations, troubled company M&A, debt restructurings, and financing matters. He has counseled companies experiencing financial difficulties, purchasers of and investors in distressed companies, and lenders to and creditors of such companies. Pat also has extensive cross-border insolvency experience. Described as “very commercial, very smart and v...

Michael Carrillo advises individuals and businesses on patent, trademark, copyright and trade secret matters, as well as on foreign and domestic patent and trademark protection. Michael navigates clients through and beyond developing, managing and policing small and large IP portfolios, creating practical strategies that leverage his clients’ assets while safeguarding their bottom line. A member of the firm’s Management Committee, Michael is listed among The Best Lawyers in Americ...

Sonya counsels companies and organizations on various employee-related legal issues and needs that arise at all the stages of the employment relationship, including the negotiation of employment agreements, restrictive covenants, policies and training, performance management, internal investigations and individual and group separations. Sonya also represents employers in litigation, her experience including the successful defense of numerous administrative charges, lawsuits and appellate proc...

Rachel B. Cowen focuses her practice in various employment discrimination and wrongful termination cases in federal and state courts. Rachel’s experience includes prosecuting and defending employee mobility and trade secret litigation on an emergency injunctive basis. She also counsels employers facing union organizing activity and picketing, and has successfully tried numerous cases before the National Labor Relations Board. She also handles collective bargaining and labor arbitrations...

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...

Kim R. Walberg is a top attorney recognized by Best Lawyers in the practice area(s) of Gaming Law. Kim R., 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 Kim R. is held by other top lawyers in the same geographic and legal practice area.

Martin G. Durkin is a trial lawyer whose practice includes antitrust and commercial litigation. He has successfully litigated business and transactional disputes, and tried many complex commercial matters. Mr. Durkin's practice is focused on commercial matters, including breach of contract, business torts, RICO, securities fraud and consumer fraud. Mr. Durkin has also represented a number of Fortune 500 companies in the defense of class actions and mass actions. Representative Matters Class A...