Cheryl M. New

Perry Lange represents clients in diverse antitrust matters before US courts, the US Department of Justice and Federal Trade Commission, state attorneys general and Congress. He has extensive experience litigating antitrust cases, including trials and appeals, securing merger clearance, and defending state and federal investigations. He has also represented a diverse set of clients in antitrust policy matters such as congressional investigations and hearings in both the House and Senate, incl...

Matt Moore maintains a sophisticated real estate and commercial litigation practice. He has successfully litigated complex contract disputes involving ADA architectural issues, housing discrimination, property contamination and defects, mortgage fraud, broker misconduct and premises liability. Over the past several years, Matt has successfully defended several ADA, premises liability, contamination and defect claims. He has obtained and collected several million-dollar verdicts for his commer...

Amy Jeffress is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. Amy, who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Amy is held by other top lawyers in the same geographic and legal practice area.

Dennis handles diverse regulatory and transactional matters, ranging from day-to-day client representation to participation in multiple agency and court proceedings involving issues of industry-wide concern. He also handles major administrative and court litigation, and FCC Enforcement Bureau proceedings, for a wide variety of clients. As a member of the District of Columbia Bar, Dennis is admitted to practice in the Third, Tenth and D.C. Circuits, and before the Supreme Court of the United S...

Though divorce can be one of life’s most distressing events, by building relationships, cultivating trust and creating solutions, Sarah Zimmerman helps clients achieve the best outcome possible while attempting to minimize the financial and emotional impact of divorce. Sarah excels in guiding clients through complex financial and custody issues, and serves a wide range of individuals including high-asset clients and working or stay-at-home spouses who are financially dependent. Sarah's ...

Betsy Karmin's clients rely on her as a trusted business advisor who has extensive knowledge of a wide range of real estate matters as well as a practical "can do" approach to getting deals done. She concentrates her practice on a broad range of commercial real estate transactions, including financing, restructuring, joint ventures, development, leasing, acquisitions and sales. Betsy has extensive experience representing landlords and tenants in office and retail leasing, as well as lenders a...

Stuart R. Barr is a top attorney recognized by Best Lawyers in the practice area(s) of Land Use and Zoning Law. Stuart R., who practices law in Bethesda, Maryland, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Stuart R. is held by other top lawyers in the same geographic and legal practice area.

Philip Katz is a top attorney recognized by Best Lawyers in the practice area(s) of FDA Law. Philip, who practices law in Washington, District of Columbia, has been recognized since 2015. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Philip is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/diamant-michael/ .

Mark S. Popofsky is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. Mark S., who practices law in Washington, District of Columbia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark S. is held by other top lawyers in the same geographic and legal practice area.