Arnie B. Mason

Arnie B. Mason is a partner at Williams Mullen in Tysons, Virginia, whose practice centers on construction projects lawsuits and disputes. He advises on contract formation, project issues, claim evaluation and preparation, litigation, mediation, arbitration, and dispute review boards. His work covers federal government construction contracts as well as state and private projects, and he assists contractors with joint ventures, small-business programs, and other government contracting concerns.

Mason earned a J.D. from the College of William & Mary School of Law in 2000, where he received the Kenneth G. Cumming Scholarship and served as managing editor of the William & Mary Law Review. He earned a B.A. from the University of Virginia in 1997. He later clerked for U.S. Bankruptcy Judge Stephen C. St. John, strengthening his research, writing, and federal court experience.

Mason represents clients through the full course of construction disputes, from contract planning and early claim analysis through formal litigation or alternative dispute resolution. His practice includes False Claims Act review and defense connected to federal projects, as well as issues involving government contracting, small-business participation, disadvantaged business enterprises, and mentor-protege arrangements. He also prepares and evaluates claims arising from project performance, payment, scheduling, and contractual responsibilities.

Arnie B. Mason has been recognized by Chambers USA for construction law and by Best Lawyers for construction-related litigation. His practice combines construction contracting, claims work, litigation, and government procurement experience. He helps project participants identify legal risks, structure agreements, assess developing disputes, and select an appropriate path toward resolution through negotiation, mediation, arbitration, administrative processes, or court proceedings.

Law Office Affiliations

• Partner, Williams Mullen
• Member, District of Columbia Bar
• Member, Maryland State Bar Association
• Member, Virginia State Bar
• Board of Governors, Construction Law & Public Contracts Section, Virginia State Bar (2014-2020)
• Member, American Bar Association

Licensed State

• District of Columbia
• Maryland
• Virginia

Education

• College of William & Mary School of Law
  Juris Doctor (JD)
• University of Virginia
  Bachelor of Arts (BA)

Awards & Badges