Meaghan A. Colligan

Meaghan A. Colligan


Meaghan A. Colligan is a Washington, D.C., environmental attorney and member of Holland & Knight's Public Policy & Regulation Group. She focuses her practice in the areas of environmental, land use, energy and municipal law.

Ms. Colligan advises real estate, manufacturing, transportation and corporate clients regarding a breadth of environmental matters, including providing permitting and remediation advice for real estate and brownfield development projects, litigation in state and federal courts, and regulatory compliance counseling. Ms. Colligan also performs due diligence and evaluates environmental risks in commercial transactions, drafting environmental provisions in a variety of agreements to protect clients' interests across a wide range of industries.

In addition, Ms. Colligan provides comprehensive representation regarding compliance, litigation, permitting and transactions involving the Clean Water Act (CWA), Clean Air Act, Resource Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), Toxic Substances Control Act (TSCA), Federal Tort Claims Act (FTCA), National Environmental Policy Act (NEPA) and state laws. Ms. Colligan has extensive experience with issues related to emerging contaminants, such as per- and polyfluoroalkyl substances (PFAS).

Prior to joining Holland & Knight, Ms. Colligan represented developers, property owners, municipalities, nonprofits, engineers, economists and scientists in New York on issues involving hazardous waste and petroleum spill cost recovery actions, brownfield development, environmental impact review under New York's State Environmental Quality Review Act (SEQRA), water pollution and wetlands, zoning and planning, project siting, alternative energy, municipal law, and real estate transactions. Ms. Colligan participated in entity formation, project development, contract negotiation, obtaining project funding sources, and permitting. Ms. Colligan second-chaired several trials and hearings, and attended public hearings before local municipal land use boards.

During law school, Ms. Colligan drafted comments and argued before an administrative law judge of the New York State Public Service Commission regarding water demand. Ms. Colligan interned for the Hon. Charles Apotheker of the Rockland County Supreme Court of New York. In addition, she served as a junior diplomat for the Mission of the Republic of the Marshall Islands to the United Nations, assisting with developing policy and financial mechanisms to address climate change concerns. She also interned for the New York City Mayor's Office of Environmental Remediation and the City of Hudson's Corporation Counsel.


  • Pace University School of Law, J.D., Environmental Certificate, with honors
  • Bard College, M.S., Environmental Policy, with honors
  • State University of New York at Geneseo, B.A., Sociology, with honors
Bar Admissions/Licenses
  • District of Columbia
  • New York
Court Admissions
  • U.S. Court of Appeals for the District of Columbia Circuit
  • All State Courts in New York
  • U.S. District Court for the Southern District of New York
  • U.S. District Court for the Eastern District of New York
  • ABA SEER, Environmental Transactions and Brownfields Committee, Vice Chair of Electronic Communications and Social Media, 2014-Present; Web Board, 2017- Present
  • New York State Bar Association, Environmental & Energy Law Section, Social Media Task Force Chair, 2016-Present Brownfields Task Force, 2014-Present
  • Teach For America, Miami-Dade County Corps Member, 2008-2010
Honors & Awards
  • The Best Lawyers in America guide, Washington, D.C. Environmental Law, Government Relations Practice Ones to Watch, 2021, 2022
  • New York Environmental Lawyer, New Member Spotlight, New York State Bar Association, 2018
  • American Bar Association Section of Environment, Energy and Resources (ABA SEER), Leadership Development Program Participant, 2017-2018
  • ABA SEER, Committee Award for Best Communications, 2015-2016 and 2017-2018
  • Miami-Dade County Public Schools, Rookie Teacher of the Year Nominee, 2008 and 2009


Speaking Engagements