Quinn P. Colgan

Quinn P. Colgan

Shaheen & Gordon, P.A.
  • Real Estate Law, Business Law
  • New Hampshire, Vermont
Claimed Lawyer Profile

Quinn is a member of Shaheen & Gordon’s Business Law and Real Estate practice groups, where he enjoys building and maintaining meaningful and collaborative relationships with his clients. Whether helping them navigate the myriad challenges of complex business transactions or assisting with all manner of regulatory, real estate, and land use issues, Quinn works closely with key stakeholders to develop practical solutions to difficult problems with integrity and precision.

Quinn brings a wealth of varied legal and business experience to his practice. In addition to his years in private practice as a business law, real estate, estate planning, and probate attorney, Quinn prosecuted civil and criminal fraud cases as an Assistant Attorney General in the New Hampshire Department of Justice's Consumer Protection Bureau. He has also worked as the contract manager in the procurement office of a large New England healthcare system and as the Special Assets Officer in the commercial credit department of one of New England's largest regional banks.

In 2023, Quinn retired as a Lieutenant Colonel from the U.S. Marine Corps Reserve after 23 years of active and reserve service as an infantry officer and judge advocate (military attorney). His final military post was as a staff attorney in the Staff Judge Advocate's Office of U.S. Central Command (USCENTCOM), one of seven geographic combatant commands within the Department of Defense.

A native of the Upper Connecticut River Valley, Quinn serves businesses in New Hampshire and Vermont. And as the son of a proud Newfoundlander, he is a dual citizen of the United States and Canada.

Duquesne University
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Suffolk University Law School
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University of New Hampshire
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Professional Experience
Shaheen & Gordon, P.A.
- Current
Commercial Special Assets Officer
Mascoma Bank
Contracts Manager
Dartmouth Health
Judge Advocate
U.S. Marine Corps Reserve (Retired)
Staff Attorney, U.S. Central Command (USCENTCOM), 2020-2022; Deputy Director, Legal Assistance Branch, RLSS, 2017-2020; Regional Judge Advocate, RLSS, 2014-2017; Staff Attorney, U.S. Marine Corps Forces Special Operations Command (MARSOC), 2012-2013; Governance Officer, G9, Task Force Leatherneck 2011-2012; Instructor, Law of War Branch, RLSS, 2010-2011; Trial Counsel, Legal Services Support Teams C&E, 2009-2010
Janson & Colgan, PLLC
Law Office of Eric W. Janson, PLLC
Assistant Attorney General
NH Department of Justice
Infantry Officer
U.S. Marine Corps
Jurisdictions Admitted to Practice
New Hampshire
New Hampshire Bar Association
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Vermont Supreme Court
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Practice Areas
Real Estate Law
Commercial Real Estate, Condominiums, Easements, Eminent Domain, Homeowners Association, Land Use & Zoning, Mortgages, Neighbor Disputes, Residential Real Estate, Water Law
Business Law
Business Contracts, Business Dissolution, Business Finance, Business Formation, Business Litigation, Franchising, Mergers & Acquisitions, Partnership & Shareholder Disputes
Contact & Map
Shaheen & Gordon, P.A.
107 Storrs Street
Concord, NH 03301
Telephone: (603) 225-7262