Matthew "Matt" DelNero

Margaret is one of the four founding partners of Rock Creek Energy Group. She has over 18 years of experience counseling and representing a broad swath of electric industry participants on a wide range of federal energy regulatory and administrative litigation matters. She provides strategic counsel to investor-owned utilities, renewable and conventional generators, private equity and institutional investors, developers, and renewable energy providers on transactional, regulatory, and litigat...

Becki is a partner in the firm's Washington, DC office, where she chairs the Credit Reporting, Privacy, and Data Security Practice Group. Her practice focuses on consumer financial services and consumer protection matters. Becki counsels financial institutions, consumer reporting agencies, service providers, and others in complying with consumer financial laws and prohibitions against unfair, deceptive, or abusive trade practices. She is an experienced advocate and litigator, representing cli...

John Parker Sweeney has more than 30 years of experience defending major class action and mass torts involving product liability and warranty, consumer protection, environmental, and toxic tort cases, allowing him to tailor an appropriate litigation response for any company to resolve "bet-the-company" risks. He regularly serves as national litigation counsel, creating and supervising comprehensive defense strategies in class action and mass tort cases across the country, most recently sweepi...

Jonathan G. Hardin is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance. Jonathan G., 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 Jonathan G. is held by other top lawyers in the same geographic and legal practice area.

Nicole is the leader of Sullivan's Investment Management Group and Chair of its Corporate Governance & Board Advisory Practice. Nicole also serves as Co-Chair of the firm's Lateral Partner Hiring Committee. Nicole’s practice focuses on the representation of boards and board committees, including independent directors, as well as a broad spectrum of financial services and other companies, such as investment companies (open-end, closed-end, BDCs and ETFs), investment advisers and brok...

Patrick F. Stokes is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. Patrick F., who practices law in Washington, District of Columbia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Patrick F. is held by other top lawyers in the same geographic and legal practice area.

Jonathan S. Klarfeld is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law. Jonathan S., who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan S. is held by other top lawyers in the same geographic and legal practice area.

David C. Kully is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. David C., 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 David C. is held by other top lawyers in the same geographic and legal practice area.

Edward R. McNicholas is a top attorney recognized by Best Lawyers in the practice area(s) of Privacy and Data Security Law. Edward R., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Edward R. is held by other top lawyers in the same geographic and legal practice area.

Robert G. Scott, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Communications Law. Robert G., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert G. is held by other top lawyers in the same geographic and legal practice area.