P. Ryan Messier

S. Libby Henninger is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. S. Libby, 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 S. Libby is held by other top lawyers in the same geographic and legal practice area.

Jonathan R. Wachs is a top attorney recognized by Best Lawyers in the practice area(s) of Business Organizations (including LLCs and Partnerships), Cannabis Law, Copyright Law, Litigation - Intellectual Property and Trademark Law. Jonathan R., who practices law in Washington, District of Columbia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan R. is held by other top lawyers in the same geographic and...

Denise Hammond, Senior Counsel, has focused exclusively on the practice of immigration law for almost 30 years. She has received numerous accolades from clients and peers for her extraordinary level of personal service, her resourcefulness, and her ability to break down complex immigration laws and find creative solutions for the most challenging cases. In 2014, Chambers Global praised Denise’s practice, noting that she "has an incredible client service approach – her personal att...

For more information, please visit www.gibsondunn.com/lawyer/debold-david/ .

Matthew A. Roberson is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs and Product Liability Litigation - Plaintiffs. Matthew A., who practices law in Fairfax, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Matthew A. is held by other top lawyers in the same geographic and legal practice area.

During his more than 30 years of practice, Mr. Jaffe has focused on dispute resolution internationally in arbitrations under various international arbitral regimes and domestically in court and arbitration proceedings. A significant part of his work has involved representing owners, contractors and other stakeholders in projects ranging from infrastructure and energy facilities to sports stadiums and a wide variety of commercial structures. He has acted as counsel in numerous international an...

Thomas P. Murphy is a Partner in the Washington, D.C. Region office of Jackson Lewis, P.C. His practice focuses on representing employers in workplace law matters, including preventive advice and counseling. Mr. Murphy has tried more than 65 jury trials in the past 38 years as a federal prosecutor and in private practice. In addition, he routinely advises clients on the labor and employment aspects of doing business in ther countries, a subject on which he frequently speaks and writes. Prior ...

When asked about Paul Schwinn, clients most often comment on his demeanor, his responsiveness and his business-minded approach to legal issues and opportunities. Working with clients across a wide range of industries, including technology, hospitality (including restaurants), oil and gas, biotech and government contracts, Paul provides counsel on a wide variety of transaction structures commonly utilized in such industries. Clients view him as an all-around business and legal advisor. During ...

Mark J. Riedy is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Mark J., who practices law in Washington, District of Columbia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark J. is held by other top lawyers in the same geographic and legal practice area.

Marc S. Lampkin is a top attorney recognized by Best Lawyers in the practice area(s) of Government Relations Practice. Marc S., who practices law in Washington, District of Columbia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marc S. is held by other top lawyers in the same geographic and legal practice area.