Mariel’s practice encompasses all types of civil litigation at both the trial and appellate levels, including complex business litigation, antitrust and unfair competition cases, and intellectual property disputes (with an emphasis on trademark and false advertising matters). Recognized by Super Lawyers as a “Rising Star” among Washington, D.C. lawyers in 2014, 2015, and 2016, Mariel has represented clients in federal and state courts, arbitration tribunals, and administrative proceedings, including before the Federal Trade Commission and the Trademark Trial and Appeal Board. She also has experience arguing in federal appeals court. In addition to her active litigation practice, Mariel counsels clients on a range of issues including pre-litigation strategy and dispute resolution, advertising compliance, brand protection strategies, and social media matters.
Mariel has a significant and varied pro bono practice, representing clients in matters ranging from criminal appeals to First Amendment challenges.
- Wollschlaeger v. Farmer: Represents three national medical organizations and six physicians in widely followed First Amendment challenge to Florida law that prevents doctors from speaking freely with patients about gun safety, both in successful district court action and on appeal.
- Cablevision v. Viacom: Represented Cablevision in litigation asserting antitrust claims against Viacom for illegally tying programming networks (S.D.N.Y.).
- Commercial and regulatory litigation: Represents clients in the financial services, health care, and life sciences industries in large-scale commercial and regulatory disputes.
- Investment management litigation: Represents independent directors of two mutual funds in federal and state court litigation alleging breach of fiduciary duty.
- TRIA Beauty v. Radiancy, Inc.: Represented an FDA-regulated medical device manufacturer in a false advertising lawsuit brought against an unregulated competitor.
- Comité Interprofessionnel du Vin de Champagne: Represents the trade association for grape growers and houses of Champagne, France, advising on trademark issues and representing the CIVC in proceedings with the Trademark Trial and Appeal Board.
- YSL Beauté v. Oscar de la Renta, Ltd.: Represented an international fashion house in a successful year-long international arbitration over termination of the client’s global trademark license agreement for fragrances and cosmetics.
- Mentioned, “11th Circ. Doubts Doc 'Gun Gag' Survives Constitutional Test,” Law 360 (June 21, 2016)
- Quoted, “Docs vs. Glocks debate takes center stage in Atlanta,” CBS Atlanta (June 21, 2016)
- Quoted, “Judges weigh Florida doctors' rights to ask you about guns,” WTSP (June 21, 2016)
- Quoted, “Docs vs. Glocks debate takes center stage in Atlanta,” WTVM (June 21, 2016)
- Author, “Social Media Evidence in Civil Litigation,” American Bar Association Section of Litigation, Trial Evidence Committee newsletter, Summer 2013, Vol. 21, No. 2 (August 2013)
- Quoted, “First Amendment Rights of Doctors at Issue In Appeal Over State Gun Owners Privacy Law,” Bloomberg BNA’s Health Law Reporter (January 17, 2013)
- Co-author, “Ten Things You Need to Know About Social Media and Intellectual Property in 2013,” Bloomberg BNA Social Media Law & Policy Report (January 8, 2013); Bloomberg BNA Patent, Trademark & Copyright Journal (January 25, 2013)
- “Case Study: Florida’s Attempt to Censor Physicians’ Discussions with Patients About Gun Safety,” Massachusetts Medical Society’s12th Annual Public Health Leadership Forum – Firearm Violence: Policy, Prevention & Public Health, April 5, 2016