Peter Gray is a partner in the firm's Environment & Natural Resources Group, focusing on disputes over responsibility for cleanup of contaminated property, challenges to state and federal environmental regulations, enforcement cases involving hazardous materials, arbitration in data compensation claims involving pesticide data submissions, and environmental due diligence in large commercial transactions.

Peter has been recognized by Chambers USA as a leading environmental attorney in the Washington, D.C., area and in Super Lawyers as a leader in his field. Peter has also been recognized by Corporate Responsibility Magazine's 2014 Legal Who's Who in Environmental Law.

In addition to his environmental litigation practice, Peter has a diverse Washington, D.C.-based regulatory practice in which he regularly represents clients before numerous federal agencies, such as the Environmental Protection Agency and the Department of Transportation, and counsels clients on hazardous materials management, release reporting requirements, and climate change planning and advocacy.

One of Peter's areas of concentration is the regulation of pesticide products by EPA, under the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA). Peter is one of a handful of lawyers experienced in litigating “pesticide data compensation” claims under FIFRA and has handled hundreds of claims over the past 25 years.

Peter writes extensively in the environmental area. He was selected by the American Bar Association to write The Superfund Manual (2015), the definitive treatise on Superfund. Other manuals and treatises he has authored include The CERCLA Basic Practice Manual (American Bar Association 2008), the Pesticide Regulation Handbook (2007), and The EPCRA Basic Practice Manual (American Bar Association 2002). Peter also participates as a commentator in broadcast media, having appeared on Fox Business News and Bloomberg Radio.

Peter co-founded the Association of Climate Change Officers, and he is a member of the Environmental Law Institute Leadership Circle. He has served in many leadership roles in the ABA Section on Environment, Energy and Resources, including past chair of the Environmental Litigation and Toxic Torts Committee and the Site Remediation Committee.

Peter is an arbitrator with the American Arbitration Association.