Oliver E. Twaddell

Oliver E. Twaddell



Practice Groups

Oliver E. Twaddell handles a wide range of commercial and general litigation in federal and state court, including cases involving breach of contract and breach of fiduciary duty claims, fraud, non-competition, unfair trade practices, and other business torts, as well as property damage, land use and environmental contamination, toxic tort, and other general tort actions. He also has experience handling copyright and trademark infringement litigation. Oliver’s background includes counseling foreign banks, corporations, individuals, partnerships, and other entities in complex domestic and international litigation.

Oliver is a frequent contributor to the firm's Environmental Law Monitor blog, where he writes extensively on per- and polyfluoroalkyl substances (PFAs), as well as developments in environmental regulation, legislation, and litigation. He is also a member of the firm’s Water Contamination group — a subgroup of the Environmental Practice Group. His background includes handling matters involving oil spills and lead paint exposure.

While earning his Juris Doctor from The George Washington University Law School, Oliver was a legal intern with the Prince George’s County State’s Attorney’s Office in Maryland and the Westchester County District Attorney’s Office in New York. He also participated in the school’s Van Vleck Constitutional Law Moot Court Competition and the Cohen and Cohen Mock Trial Competition. Oliver is a member of the Phi Beta Kappa National Honor Society.

Commercial, Complex, and Other Litigation, and Appellate Representations
  • Major pharmaceutical company and its subsidiary in federal litigation and arbitration against claims of breach of contract, breach of fiduciary duty, fraudulent misrepresentation, and equitable claims arising out of a joint venture relationship. After a merger between the pharmaceutical company and its newly owned subsidiary, the plaintiff company asserted claims for millions of dollars in exposure based on the acquisition of the subsidiary, and purported ownership interest in a drug developed by the joint venture.
  • Health insurance company against securities fraud claims under 10(b) and 20(a), and common law fraud and breach of contract claims. 
  •  Product manufacturer involved in an arbitration concerning breach of contract, breach of warranty, and negligence claims arising from multimillion-dollar property damage at a distribution center.
  • Significant holding company and its general contractor concerning a high-profile redevelopment project and allegations of negligence in maintaining proper air quality.
  • Insurance broking and risk management group against allegations of misappropriation of trade secrets and violations of restrictive covenants in a relatively new and distinct area of the insurance industry.
  • Electric company against allegations of breach of contract, negligence, and unfair trade practices concerning complex issues of the construction of a high-voltage cable system at a power generation facility, which later exploded and caused millions of dollars in property damage.
  • Real estate development company in breach of contract action concerning the sale of a property to a condominium company and whether environmental remediation steps had been adequately addressed.
  • Saudi Arabian corporation and bank in federal litigation concerning various actions, including Alien Tort Statute and common law tort claims.
  • International travel corporation and its president against a $30 million lawsuit based on claims of breach of contract, fraud, conspiracy, and breach of fiduciary obligation involving a joint venture relationship.
  • Prominent international businessman and Saudi Arabian multinational conglomerate against a multibillion-dollar complex federal lawsuit.
  • 501c(3) group in lawsuit against a Middle Eastern country and its regime for various human rights violations.
  • New York construction company with city-wide contracts in various premises liability actions.
  • Insurance company in complex Defense Base Act administrative action involving allegations concerning the connection between a traumatic brain injury and suicide.
  • Assisted in briefing appellate arguments on behalf of a large corporation, an individual, and a bank at the U.S. Court of Appeals for the Second Circuit where the lower court's dismissal of claims against clients was affirmed.
  • Drafted principal and reply briefs filed with the U.S. Court of Appeals for the District of Columbia Circuit on an employment law matter related to allegations of discrimination. 
  • Drafted principal and reply briefs filed with the U.S. Court of Appeals for the Federal Circuit on a merit systems protection board case.
  • Assisted in the representation of hundreds of veterans before the U.S. Court of Appeals for Veterans Claims. 
  • Drafted amicus curiae brief on the scope of an unfair trade practices statute in a high profile case
  • Industrial investment portfolio company in breach of contract action arising from executive searches in China, dismissed on forum non conveniens grounds
  • Represented oil company in oil spill dispute based on theory under New York Navigation Law
  • Represented property owners subject to lead paint exposure claims
  • Represented major oil company and environmental consultant in toxic exposure claims
  • New York Metro Super Lawyers Rising Stars, 2018
Professional Affiliations
  • New York State Bar Association
Admitted to Practice
  • New York 
  • U.S. District Court for the Eastern and Southern Districts of New York
  • U.S. District Court for the District of Connecticut
  • U.S. Court of Appeals for Veterans Claims
  • The George Washington University Law School, J.D., 2011
  • American University, B.A., summa cum laude, 2007
  • "US Department of Health and Human Services’ Highly Anticipated ATSDR Report on PFAS" (Co-Presenter), Goldberg Segalla Toxic Tort and Environmental Law Webinar Series, October 4, 2018
  • "Roughwaters on the Horizon — EPA Overreach Involving the Clean Water Act," Webinar, September 30, 2016