Leif R. Sigmond, Jr.

Gregory E. Ostfeld is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice. Gregory E., who practices law in Chicago, Illinois, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gregory E. is held by other top lawyers in the same geographic and legal practice area.

Phillip M. Schreiber is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management. Phillip M., 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 Phillip M. is held by other top lawyers in the same geographic and legal practice area.

Ashley C. Keller is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs. Ashley C., 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 Ashley C. is held by other top lawyers in the same geographic and legal practice area.

John Gatz is a patent attorney who concentrates his practice on patent prosecution, patent counseling and patent litigation. John has extensive experience in the life sciences and manufacturing industries. My focus Patent Prosecution/Counseling I prosecute patents and counsel clients in a number of mechanical- and chemical-related technologies including: biomechanical devices, chemical products and processes, sensor-dispensing instruments, analyte meters, test sensors, non-invasive processes,...

Felicia Gerber Perlman represents clients in a variety of complex business reorganizations, debt restructurings and insolvency matters. Ms. Perlman has advised debtors, creditors, lenders, investors, sellers, purchasers and other parties-in-interest in all stages of restructuring transactions from Chapter 11 reorganizations to out-of-court negotiations, workouts and acquisitions. She is a frequent speaker on bankruptcy topics. In addition, she has been recognized in Turnarounds & Workouts...

Mercedes Badia-Tavas provides legal and business guidance to clients on a broad range of immigration law cases, with focus on Fortune 500 and small companies alike. Mercedes supports her firm’s offices and clients across various states on immigration employment transfers and up-to-date compliance. As an immigrant herself, Mercedes finds particular fulfillment in helping companies and individuals immigrate to the United States and participate in the American dream through startups and bu...

Joseph Mulherin is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management. Joseph, 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 Joseph is held by other top lawyers in the same geographic and legal practice area.

Anthony Antognoli is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Anthony, 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 Anthony is held by other top lawyers in the same geographic and legal practice area.

Rachel Brown is a partner in the Real Estate Group in the Chicago office of Kirkland & Ellis LLP. Her practice focuses on finance, venture formation, acquisitions and dispositions, and development. She advises borrowers and lenders in all types of real estate based financing transactions including first mortgage loans, construction loans, mezzanine financings, credit facilities, subscription facilities and other structured financings. Rachel also represents clients on workouts, loan sales...

Chuck is a pragmatic, solution-oriented real estate attorney whose clients rely upon to handle their most complex and high-priority transactions. He is analytical, strategic, and creative. Chuck is a skilled negotiator, with a deep understanding of his clients’ goals and the experience and business acumen necessary to help them achieve those goals. As a partner in Barack Ferrazzano’s Real Estate Group, Chuck’s practice focuses primarily on real estate finance, and the acquis...