An experienced Clean Air Act practitioner, Zach Pilchen focuses his Washington, D.C.–based practice on air emissions, air quality, greenhouse gas regulation, and environmental compliance. He represents companies and trade associations in shaping and responding to EPA and state air rules, developing compliance strategies, and defending against enforcement actions. His work spans industries such as transportation, chemicals, technology, manufacturing, retail, and construction, and frequently involves power-sector regulations and interstate air issues that affect regional air quality and public health.

Mr. Pilchen’s counsel is informed by his tenure in EPA’s Office of General Counsel, where he served under three presidential administrations and advised policymakers in both the executive and legislative branches. At EPA, he worked on major Clean Air Act rulemakings involving state implementation planning, interstate transport of air pollution, and actions linked to the National Ambient Air Quality Standards, as well as federal greenhouse gas regulations for the power sector. His contributions earned recognition from both EPA and the U.S. Department of Justice. While detailed to the U.S. Senate Committee on Environment and Public Works, he provided legal support on oversight and bipartisan environmental legislation, including the American Innovation and Manufacturing Act and the Vessel Incidental Discharge Act, helping to modernize key environmental programs.

Previously deputy chair of an environmental boutique firm’s air and climate practice, Mr. Pilchen now leverages his public- and private-sector experience to help clients meet environmental obligations while advancing their business objectives. He holds an LL.M. from George Washington University Law School (highest honors) and a J.D. from Lewis & Clark Law School (magna cum laude).

Zach Pilchen