Mark A. Gilday

T.J. Sullivan is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. T.J., who practices law in Washington, District of Columbia, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which T.J. is held by other top lawyers in the same geographic and legal practice area.

Erika Harmon Arner is a nationally recognized leader in trial practice before the Patent Trial and Appeal Board (PTAB) and related appeals to the U.S. Court of Appeals for the Federal Circuit. She consistently ranks as one of the top three female attorneys appearing in PTAB trials and was named a PTAB Litigator of the Year by Managing Intellectual Property. She has argued and won a number of landmark cases at the PTAB and Federal Circuit for both patent challengers and patent owners. Erika&rs...

Nigel L. Wilkinson is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Nigel L., who practices law in Reston, Virginia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nigel L. is held by other top lawyers in the same geographic and legal practice area.

Jason Chipman is widely recognized as a national leader in handling complex regulatory matters associated with data security, cyber incident response, the Committee on Foreign Investment in the United States (CFIUS) and related export controls.

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

David Brown is co-chair of the firm’s corporate practice area, which includes its corporate, energy, finance, health care, real estate and public policy groups, and a partner in the Financial Services & Products Group, which he previously led. His practice focuses on mergers and acquisitions, corporate governance, securities disclosure, and payment system and other technology transactions, with an emphasis on the financial services, technology and telecommunications industries. Davi...

For more information, please visit www.gibsondunn.com/lawyer/williams-greta-b/ .

Will Planert is a Partner in the firm’s International Trade practice. He concentrates on representing multilateral and foreign-based corporations in a wide variety of international trade disputes, including antidumping and countervailing duty investigations, Section 201 (safeguards) cases, anticircumvention investigations, and customs compliance matters. Mr. Planert appears regularly before the U.S. Department of Commerce, the U.S. International Trade Commission, and the U.S. Bureau of ...

Katherine D. Smith is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Katherine D., who practices law in Reston, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katherine D. is held by other top lawyers in the same geographic and legal practice area.

David G. Noren focuses his practice on international tax planning for multinational companies. David advises clients on a wide range of “outbound” and “inbound” issues, with a particular focus on the subpart F anti-deferral rules, the application of bilateral income tax treaties, and the treatment of cross-border flows of services and intellectual property rights under transfer pricing and other rules. Read full biography: https://www.mwe.com/people/noren-david-g/