Beveridge & Diamond
Harold L. Segall photo

Harold L. Segall


1350 I Street, N.W.
Suite 700
Washington, DC 20005-3311

  • Yale University (B.A.)
  • Hebrew University of Jerusalem, Israel (Middle East Studies, Rotary Graduate Fellowship)
  • University of Chicago (J.D.)
Bar Admissions & Memberships
Bar Admissions & Memberships
  • Pennsylvania
  • District of Columbia
  • Federal Appellate Courts: United States Supreme Court; U.S. Courts of Appeals for the District of Columbia, Second, Third, Fourth, Sixth and Tenth Circuits
  • U.S. District Courts: District of Columbia; Eastern District of Pennsylvania; District of Colorado
  • American Bar Association
  • Defense Research Institute, Member
  • Washington Lawyers Committee for Civil Rights Under Law, Trustee
  • Adat Shalom Reconstructionist Congregation, Bethesda, MD, Co-President
  • Whitman Walker Health Legal Services Program, Steering Committee, Going the Extra Mile Benefit, 2012-2015; Co-Chair 2012-2013

Hal Segall has a proven and winning trial and appellate litigation record,  with over 30 years of experience in federal and state courts throughout the U.S. His practice encompasses environmental claims, toxic torts and related commercial and real estate cases. Hal also has extensive experience with alternative dispute resolution, both as an advocate and a court-appointed mediator.

While Hal focuses his practice primarily on litigation, he also applies his litigation background to negotiating protective contractual provisions in transactions involving environmental matters, and to resolving associated regulatory issues.

Hal maintains an active pro bono practice, currently serving as Co-Chair of the Firm’s Pro Bono Committee and as pro bono General Counsel of the Environmental Law Institute in Washington, DC.  His pro bono litigation matters have involved employment discrimination, housing discrimination, HIV/AIDS, and special education.

Hal served multiple terms as Chair of the Firm’s Litigation Practice Group and member of its five-principal Management Committee, which oversees all firm management and compensation matters. He is married with two daughters and competes in Olympic distance triathlons.

Hal was selected for inclusion in Super Lawyers Editions 2013-2018 based on peer reviews.

Representative Matters
Representative Matters
  • Won case in U.S. District Court for the District of New Jersey relating to alleged cleanup costs and natural resource damages arising from a pipeline release, and also won contractual indemnification claim against a co-defendant, resulting in reimbursement of client’s legal fees and costs.
  • Won case in U.S. District Court for the Southern District of Alabama involving alleged environmental and human health risks and violations of the federal Resource, Conservation and Recovery Act, and also won contractual indemnification claim against a third party, resulting in an award of client’s legal fees and costs.
  • Won citizens suit brought by citizens groups under the federal Resource Conservation and Recovery Act against an energy company in the U.S. District Court for the District of Columbia.
  • Won case in U.S. District Court for the District of Delaware based on a ruling that our client, a large corporation, bore no environmental liability for the waste disposal of its subsidiary, a polypropylene manufacturer, resolving a number of legal issues as to what level of involvement a parent company can have with its subsidiary's environmental matters without triggering environmental liability; obtained prior rulings dismissing contractual indemnification claim and other state law claims.
  • Won case in U.S. District Court for the Northern District of New York and on appeal to the United States Court of Appeals for the Second Circuit where both courts held that our client, which owned and operated an oil storage terminal, had no liability under U.S. or New York law for contamination of the Utica Harbor and vicinity; set precedent regarding the scope of statutory defenses under a federal statute and the scope of liability under that statute, as well as the burden of proof under a New York environmental statute.
  • Won pre-trial dismissal of lawsuit brought in U.S. District Court for the District of Colorado by State of Colorado and a third-party claim brought in the same court by a private party in a related case based on alleged contamination from mining activities of a former subsidiary of our client in Colorado.
  • Won case in U.S. District Court for the District of Oregon, involving alleged fraud, contract, and environmental claims relating to the sale of a mercury mine, setting precedent under federal Superfund statute and State hazardous waste law; favorably settled after dismissal of all but one count upheld on appeal to United States Court of Appeals for the Ninth Circuit.
  • Won case in U.S. District Court for the District of Maryland based on a ruling that a public school system failed to provide disabled, nine year old child with the free and appropriate educational program required under federal law.
  • Defeated insurer’s challenge to insurance coverage and obtained highly favorable settlement in toxic tort case in D.C. Superior Court involving lead issues on behalf of commercial real estate owners and property manager.
  • Favorable settlement early in discovery of toxic tort suit based on allegations of leukemia and death arising from claimed exposure to manufactured gas plant waste.
  • Favorable settlements reached in multiple cases in District of Columbia Superior Court and U.S. District Court for the District of Columbia arising from environmental, construction, contract and tort claims relating to alleged releases from underground storage tanks, on behalf of both plaintiff and defendant property owners.
  • Favorable settlement of dispute over liability for allegedly deficient asbestos survey undertaken for a developer in Colorado, after initiating informal, pre-litigation process, avoiding litigation fees and costs.
  • Favorable settlements reached in multiple cases in West Virginia involving design and construction deficiencies relating to municipal wastewater treatment facilities.