William L. Lahey

Senior Counsel

Tel. 617.621.6550

Bill is recognized as a leading environmental lawyer as recognized by Best Lawyers in America and other publications.  He has over 35 years of experience handling complex environmental, energy and land use matters for clients throughout the United States and internationally.

His clients have included: electric and gas utilities, universities and health care organizations,  biotechnology companies, renewable energy companies and major airports across the country. He has testified in Congress on environmental legislation and policy matters and has published widely on environmental law topics.

Bill’s pro bono work includes winning an  historic ruling invalidating  offshore oil leasing in Belize that threatened the world’s second largest barrier reef and helped earned award for Excellence in Pro Bono from Massachusetts Lawyers Weekly and the Massachusetts Bar Association. He also served as a legal advisor to the  Royal Government of Bhutan where he drafted environmental legislation and helped create a new justice department.

He joined Anderson & Kreiger in 2006 from Palmer & Dodge where he was chair of the litigation department.


The Best Lawyers in America, Environmental Law and Litigation, 2011-2022

Massachusetts Super Lawyers, 2010-2020

Chambers USAAmerica's Leading Lawyer for Business; Environmental Law, 2010-2018

Access to Justice Fellowship, 2015-2016


Cambridge Health Alliance (CHA), Board member

National Alliance on Mental Illness-MA, Board member

Harvard Medical School/ CHA Search Committee



U.S. Court of Appeals, First Circuit

U.S. District Court, District of Massachusetts


Harvard Medical School, Masters in Bioethics (pending)

University of Wisconsin Law School, J.D. 1982
Harvard Law School, Visiting Student, 1981

University of Wisconsin, B.S. 1978

  • Represented Excelerate Energy in the permitting, construction and operation of a major LNG port off the coast of Massachusetts, including coordinating the successful effort to obtain dozens of local, state and federal permits.
  • Represents National Grid on permitting major infrastructure projects including helping Grid successfully obtain state and federal permits for a new 32-mile electric transmission line in Massachusetts and Rhode Island.
  • Defends one of the world’s largest chemical companies in a major Superfund site in Florida.
  • Advises airport owners across the country on environmental matters, including the expansion of the Salt Lake City International Airport.
  • Lead the legal and engineering team that successfully obtained dozens of federal permits for several major coastal infrastructure facilities in Puerto Rico.
  • Served as legal advisor to the Royal Government of Bhutan on environmental matters and judicial reform.

Bill has published numerous articles on environmental and land use matters in Harvard Environmental Law Review, Ecology Law Quarterly, Maine Law Review, Massachusetts Law Review, Technology Review, and other publications.

Bill is an avid cyclist, who regularly participates in the bike race up Mount Washington and was on the winning team of the race across Bhutan (see the Yahoo! Sports article on Bill’s involvement in The Craziest Bike Race on Earth).

Bill’s civic involvements include serving on the Board of the Environmental Business Council of New England and the Smith Leadership Charter School, which serves underprivileged middle school students (former board chairman).