Mark N. Duvall
About Mark N. Duvall
Mark N. Duvall is a lawyer based in Washington, DC and has been recognized in The Best Lawyers in America® since 2013. Mark N. Duvall is recognized in the following practice area:
- Washington, District of Columbia
- Environmental Law
Current Firm: Beveridge & Diamond PC
Education: University of Virginia, J.D., graduated 1978
Location: Washington, DC
Nearby Lawyers
Leon Fresco is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Leon, 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 Leon is held by other top lawyers in the same geographic and legal practice area.
Joseph L. Barloon is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar and Financial Services Regulation Law. Joseph L., 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 Joseph L. is held by other top lawyers in the same geographic and legal practice area.
Joshua B. Waxman is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Joshua B., 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 Joshua B. is held by other top lawyers in the same geographic and legal practice area.
Thomas Beline is a partner in Cassidy Levy Kent’s Washington DC office. Mr. Beline’s practice focuses on advising clients on all areas of import regulatory compliance and policy, trade remedies, and international trade litigation. Mr. Beline regularly appears as lead counsel before the U.S. Department of Commerce, the U.S. International Trade Commission, the U.S. Court of Appeals for the Federal Circuit, the U.S. Court of International Trade, and North American Free Trade Agreemen...
David Masterman has practiced for over 30 years in Northern Virginia. He is admitted to the bars of Virginia’s state and federal courts, and to the bar of the Supreme Court of the United States. Mr. Masterman has served as chair of the family law section of the Arlington County Bar Association, the Virginia Trial Lawyers Association and, more recently, the Virginia State Bar. He served on the Board of Governors for the Family Law Section for 6 years and later on the Board of Governors o...
Jonathan P. Trotta is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Jonathan P., 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 Jonathan P. is held by other top lawyers in the same geographic and legal practice area.
Since cofounding Stein Sperling 40 years ago, Millard Bennett has built a robust and varied business law practice, while simultaneously growing and expanding the firm as Managing Partner into one of Montgomery County’s largest and most sought after law firms. In addition to his time tested business acumen, Millard’s intuition, empathy and meticulous attention to his clients’ individual needs has earned him a reputation as a go-to business lawyer. Beyond advising clients on b...
Elyse L. Strickland is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Finance Law and Family Law. Elyse L., who practices law in Potomac, Maryland, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Elyse L. is held by other top lawyers in the same geographic and legal practice area.
John A.C. Keith is a top attorney recognized by Best Lawyers in the practice area(s) of Bet-the-Company Litigation, Commercial Litigation, Legal Malpractice Law - Defendants, Litigation - Trusts and Estates and Trusts and Estates. John A.C., who practices law in Fairfax, Virginia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John A.C. is held by other top lawyers in the same geographic and legal practice area.
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
Build Your Legal Practice with Effective Online Networking
by Jamilla Tabbara
How thoughtful online networking supports sustained legal practice growth.
Blogging for Law Firms: Turning Content into Client Connections
by Jamilla Tabbara
How law firms use blogs to earn trust and win clients.
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer