Sean Mahoney

Executive Vice President and Director, CLF Maine CLF Maine @seanclf

Sean Mahoney serves as the Executive Vice President, Director of Programs and Director of CLF’s Maine Advocacy Center. Prior to joining CLF in 2007, Sean practiced environmental law in San Francisco and Portland, ME for 15 years, where he represented a variety of commercial and non-governmental entities in all aspects of state and federal environmental litigation and permitting.

At CLF, Mahoney focuses on marine conservation and sustainability, climate change, transportation and energy infrastructure, and restoring and protecting Maine’s rivers and coastal watersheds.

Mahoney, a resident of Falmouth, received his J.D. from the University of Virginia School of Law and his undergraduate degree from Bowdoin College. He was a Judicial Law Clerk for the Honorable Fred I. Parker, U.S. District Court for the District of Vermont and served as a Peace Corps volunteer in Sri Lanka. Mahoney has been recognized as a leading lawyer in his field by a number of organizations, including the respected legal research and publishing firm, Chamber & Partners. He has served on a number of boards, including GrowSmart Maine (chair), Gulf of Maine Research Insitute, Konbit Sante and the Falmouth Land Trust, and currently serves as a Town Councilor in Falmouth.

Recent Posts

Restoration Efforts Bring Thousands of Native Fish Back to Maine’s Coastal Rivers
It’s that time of year when fish like alewives and blueback herring journey from the sea to their native fresh waters to spawn. As a keystone species, these fish, collectively known as river herring, play a critical role as building blocks in our coastal ecosystems. They are also important to the health of New England’s fisheries,…
CLF Takes on LePage in Maine’s Highest Court
“Using less energy saves families and businesses money.” This truism guides the mission of Efficiency Maine Trust, a state-funded entity designed to provide low-risk, high-reward energy efficiency resources to families and businesses in the state. Saving money is usually something everyone can agree on, and yet Governor LePage and his appointees on the Public Utilities…
Been There, Stopped That: Survival Lessons for a Trump Presidency from Maine
As the country girds itself for the incoming Trump administration, we can draw lessons from the experience of Mainers under Governor Paul LePage, who remarked that, before Trump was Trump, LePage was LePage. The parallels to the Trump administration are notable. Like President-elect Trump, Governor LePage did not receive a majority of votes when he…
Presumpscot River Will Flow a Little More Freely Thanks to Historic Settlement
River herring and shad play a critical role in the health of Maine’s coastal fisheries, serving as food for cod, salmon, and striped bass and as a bait fish for lobstermen. Their populations have dipped dangerously low over the last century, however, as dams built to power riverside industries blocked access to traditional spawning grounds.…
Lessons for Big Gas from Maine’s Last Proposed LNG Terminal
With very little fanfare, the last proposal for a liquefied natural gas (LNG) terminal in Maine was just dismissed by federal regulators. At least half a dozen LNG terminal projects have been proposed in Downeast Maine over the last 15 years, with this last one in play, or better yet, suspended animation, for the last…


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