Patrick T. O’Brien

Craig E. White is a principal with Sevila, Saunders, Huddleston & White, P.C. in Leesburg, Virginia, where he has practiced law since his admission to the Virginia State Bar in 1988. Mr. White practices in all aspects of family law, including but not limited to divorce, equitable distribution of property, support and custody. He is also certified as a family law mediator by the Supreme Court of Virginia and has been successfully mediating family law cases since 2005. Mr. White is a former...

Bill Christiansen specializes in biotechnology patent matters, with particular emphasis on U.S. and international patent procurement, strategic management of patent portfolios, investment due diligence, early stage company counseling and competitive patent position analysis. He received his B.S. in Biochemistry and Biophysics (with honors) from Oregon State University (1991). After obtaining a Ph.D. in Biochemistry/ Biophysics/Molecular Biology from the University of Notre Dame (1995), for wh...

Jeff Witt is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Jeff, 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 Jeff is held by other top lawyers in the same geographic and legal practice area.

Cynthia is a Shareholder, Vice President, and Legal Team Manager at Trow & Rahal. She has practiced immigration and nationality law since 1996. She specializes in immigration for businesses, athletes, performing artists (individuals and groups), as well as family related matters. In the role of Vice President, Cynthia works with Trow & Rahal’s management to further the firm’s mission. As Legal Team Manager, she is responsible for overseeing the training, mentoring, and gui...

For more information, please visit www.gibsondunn.com/lawyer/ludwiszewski-raymond-b/ .

David J. Levine has more than 35 years of experience practicing international trade law. He counsels clients on import relief, customs, export controls, trade sanctions, anti-boycott, national security reviews of foreign investments and related trade laws and procedures. David advises and represents clients in antidumping and countervailing duty proceedings, trade controls and customs proceedings, national security (CFIUS) reviews of foreign investment in the US, trade compliance diligence in...

Kwame Manley is the Global Co-Chair of the Paul Hastings Litigation Department, and the former Chair of the Investigations and White Collar Defense practice at Paul Hastings. Based in the firm's Washington, D.C. office, Mr. Manley focuses his practice on white-collar criminal defense, internal corporate investigations, and complex civil litigation. A former federal prosecutor, Mr. Manley defends individuals and companies before various agencies, including the U.S. Department of Justice (DOJ),...

Linda Singer represents governments, attorneys general and other public entities in high-impact, high-stakes litigation and investigations as head of the firm’s Public Client practice area. The former Attorney General of the District of Columbia, Linda’s knowledge and experience includes serving in the public, not-for-profit and private sectors. As AG, Linda gained invaluable insight into the duties of attorneys general and how law firms with the right resources and experience can...

Margaret Marks is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Trusts and Estates. Margaret, who practices law in Arlington, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Margaret is held by other top lawyers in the same geographic and legal practice area.

Brian E. Ferguson is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Patent. Brian E., who practices law in Washington, District of Columbia, has been recognized since 2008. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brian E. is held by other top lawyers in the same geographic and legal practice area.