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Matt Legg is a partner at Brockstedt Mandalas Federico LLC with extensive experience in public entity litigation and environmental litigation, as well as a variety of other mass tort and class action matters.

Matt serves on the Plaintiffs’ Steering Committee (PSC) and School District Subcommittee in In re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation (MDL No. 3047), a nationwide litigation involving claims against major social media companies related to youth mental health. He and his team represent more than 200 school districts in the litigation, including a bellwether plaintiff.

Matt also represents thousands of Marines, veterans, and their families affected by groundwater contamination at Camp Lejeune, the U.S. Marine Corps Base in Jacksonville, North Carolina. He works with the Veterans of Foreign Wars (VFW), Marine Corps Reserve Association (MCRA), Naval Enlisted Reserve Association (NERA), and Reserve Organization of America (ROA) to help veterans and their families seek compensation for injuries caused by exposure to toxic water at the base.

Matt’s work has earned national recognition from Lawdragon, Super Lawyers, and The National Trial Lawyers. He is also part of teams recognized by Chambers and Partners in Litigation – Mainly Plaintiffs (Maryland) and Product Liability – Plaintiffs (USA Nationwide), as well as the Governmental Representation Group of the Year at the 2024 Elite Trial Lawyers awards.

Public Client Litigation

  • Serves on the Plaintiffs’ Steering Committee (PSC) and the School District Subcommittee, and represents more than 200 school districts, including one bellwether plaintiff, in litigation seeking to hold social media companies responsible for the student mental health crisis caused by social media addiction. In re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation (MDL No. 3047).
  • Representation of more than 60 school districts in litigation against the e-cigarette manufacturer JUUL, resulting in more than $60 million in settlement to clients. In re: Juul Labs, Inc. Marketing, Sales Practices & Products Liability Litigation (MDL No. 2913).
  • Representation of cities, counties, and school boards against insulin manufacturers and pharmacy benefit managers. In re: Insulin Pricing Litigation (MDL No. 3080).
  • Representation of more than 40 cities and counties in Florida, South Carolina, and Kentucky in litigation against opioid manufacturers and distributors. In re: National Prescription Opiate Litigation (MDL No. 2084).

Environmental Litigation

  • Representation of individuals in landmark environmental case against poultry processing giant Mountaire. For close to two decades, the company had violated its permits by disposing of wastewater containing excessive nitrates, damaging the region and causing health problems to its residents. The historic $205 million settlement was the largest resolution of nitrate groundwater contamination in history.
  • Representation of residents in North and South Carolina impacted by air and water pollution from the New-Indy Catawba paper mill in Fort Mill, South Carolina, which allegedly released hydrogen sulfide and other harmful contaminants into the air and discharged inadequately treated wastewater into the Catawba River. After nearly three years of investigation and litigation, a federal judge approved a $103 million settlement to fund measures to stop the pollution, repair the damage, and restore the environment.
  • Ongoing representation of thousands of Marines, veterans, and others affected by groundwater contamination at Camp Lejeune, in partnership with the VFW, MCRA, NERA, and ROA.
  • Ongoing representation of residents in Elkton, Maryland, impacted by PFAS exposure.

Prior to joining BMF, Matt was a member of the University of Maryland Football Commission that was tasked with investigating the culture of the school’s football program after the death of Jordan McNair.

Matt received his undergraduate degree in English and Classics from Bowdoin College, and his Juris Doctor from the University of Maryland School of Law.

Appointments and Awards

  • Plaintiffs’ Steering Committee (PSC), In Re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation.
  • School District Subcommittee, In Re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation.
  • Lawdragon Green 500: Leaders In Environmental Law, (2025 – 2026)
  • Lawdragon 500 Leading Plaintiff Consumer Attorneys (2026)
  • Lawdragon 500 X – The Next Generation (2024 – 2026)
  • SuperLawyers “Rising Star” (2022 – 2026)
  • Member of the Delaware Department of Justice Environmental Council Panel (2021-present)
  • The National Trial Lawyers: Top 40 Under 40 (2020-2025)

Bar Admissions

  • Court of Appeals, Court of Special Appeals, Circuit Courts and District Courts – All Jurisdictions in Maryland
  • United States District Court for the District of Maryland
  • Pro Hac in a variety of other jurisdictions.

Matt lives in Baltimore with his wife, Mallory, his two daughters, Lucy and Cora, and their two dogs, Punch and Walter.