Full Name
Jeffrey Longsworth
Job Title
Earth & Water Law
Speaker Bio
Jeff Longsworth litigates and provides legal counsel pertaining to issues that arise under federal environmental laws and regulations.
His practice is focused on Clean Water Act matters, especially those issues involving permitting, stormwater, effluent limitations guidelines, enforcement, inspections and spill prevention across local, regional and national platforms, as well as emerging contaminants, such as PFAS, sustainability and energy efficiency.
Jeff serves as special environmental counsel to numerous national trade associations, Fortune 500 companies, industries, coalitions, airports, state and municipal government agencies, and other regulated parties before federal and state regulatory and enforcement authorities. He works closely within the federal rulemaking process with the U.S. Environmental Protection Agency, Department of Energy, Small Business Administration, and White House Office of Management and Budget, among others. Jeff also advises clients and the firm’s legislative team on environmental issues arising under federal and state legislation.
Jeff practices at the cutting edge of Clean Water Act (CWA) issues and its application to regulated entities across the country. After decades of practical experience in this specific and complex area of the law, Jeff has seen, experienced and resolved the critical challenges his clients and their constituents face from both the individual business and industry wide perspectives. Jeff’s clients rely on him to interpret CWA provisions in novel and original ways. They appreciate that he rises to the occasion to protect their interests with sound and balanced answers to sophisticated questions that rarely warrant a single, simple or straight-forward analysis or response.

To further respond to his clients’ needs, Jeff has expanded his CWA practice into related and overlapping areas, including emerging contaminants, sustainability and energy efficiency. In particular, he assists clients in comprehensive, ongoing investigations of possible PFAS contamination at numerous facilities. These evolving challenges help Jeff to remain at the forefront of environmental counseling and strategic thinking.
Jeff is a team player who is personally invested in making a difference to those around him. Clients and colleagues alike respect his comprehensive knowledge not only of the law, but also regarding the realization of client objectives. Jeff cares about how his clients are perceived in the community and by regulators. He is diligent in his representation of client interests and advocates their point of view, while also building productive working relationships that ultimately reflect favorably on their reputation.
Jeff is a frequent speaker, educator, writer and media commentator on environmental law. He also is a cycling enthusiast and ice hockey player, and formerly played rugby and soccer.

Jeff graduated from Amherst College and received his J.D. from The Catholic University of America, where he was a member of the Law Review. Jeff is a member of the bars in Washington, D.C. and Maryland.
Jeffrey Longsworth