Matthew S. Warner is an Associate in Preti Flaherty's Litigation, Data Security, and Government Affairs groups, practicing from the firm's Portland office.

Matt has a wide-ranging practice, which includes commercial litigation, land use planning, and administrative law. He is an experienced trial lawyer, with success in both state and federal court, as well as before numerous state agencies and boards. He serves as counsel to a number of Maine companies, advising his clients on an extensive array of matters. Matt also helps clients navigate the political and regulatory process in Augusta.

Prior to joining Preti Flaherty in 2013, Matt worked in government and public affairs. A former speechwriter and grassroots advocate for more than a decade, Matt worked at the White House and the U.S. Department of State, and served as a speechwriter for the U.S. Ambassador to NATO in Brussels.

Matt has a B.A. from Boston University, a J.D. from Columbia Law School, and an LL.M. from the London School of Economics and Political Science, where he specialized in international law, and was an adjunct professor at University of Maine School of Law. He serves on the Board of Directors for the Chebeague and Cumberland Land Trust, the Southern Maine Conservation Collaborative, and the World Affairs Council of Maine.

A native of Holden, Maine, Matt regularly participates in mountain bike and cross-country ski marathons, and has competed in the Tuckerman’s Inferno Pentathlon as a solo finisher. Matt lives in Cumberland with his wife and son.

Practice Areas


  • Boston University (B.A., 2006)
  • Columbia University School of Law (J.D., 2011)
    • Harlan Fiske Stone Scholar
  • London School of Economics (LL.M., 2011)
    • Merit


  • Maine
  • U.S. District Court, District of Maine

Professional Affiliations

  • Maine State Bar Association
  • Adjunct Professor, University of Maine School of Law
  • Board of Directors, World Affairs Council of Maine

Honors & Awards

  • Recognized as a New England Rising Star in the area of general litigation