Photograph of Kieran J. Tuckley

Kieran J. Tuckley


Kieran James Tuckley is a counsel in the Mass Tort, Product, and Consumer Litigation Group of Crowell & Moring's Washington, D.C. office, where his practice focuses on environmental and toxic tort litigation.

Kieran defends Fortune 500 companies involved in complex products liability and toxic tort litigation pending in federal and state courts across the country. A natural investigator, Kieran often acts as a lead analyst in charge of building the factual record for his clients. He is adept at mining a corporation’s archive and synthesizing complex records for use in responding to discovery, preparing both fact and expert witnesses, and developing defenses for his clients. Building on his personal and professional interest in scientific developments, Kieran routinely tracks scientific literature of interest to the Toxic Tort bar, and is adept at quickly understanding complex scientific issues involved in the defense of his clients. He often applies this knowledge to the development and preparation of scientific experts used in litigation.

Kieran focuses a portion of his practice on critical scientific evidentiary issues. He is a frequent participant in Daubert/Frye briefing efforts that have led to the exclusion of plaintiffs' experts' speculative causation opinions. He has authored amicus briefs on scientific evidence and causation standards in toxic tort cases in the highest state courts of Maryland, Pennsylvania, and Virginia. Kieran has also co-authored a number of articles concerning scientific evidence and causation that have been widely utilized by the toxic tort defense bar.

Kieran is a passionate advocate on immigration issues and devotes his pro bono practice to defending vulnerable foreign nationals seeking protection from harm in their country of origin, including both affirmative asylum and defensive asylum cases. His proudest achievement was the successful pursuit of asylum for a Kenyan woman facing deportation from the United States after fleeing her Kenyan village after undergoing FGM and horrific domestic abuse.


  • King's College London, LL.B. (2005) with honors
  • The George Washington University Law School, LL.M. (2008)
  • The George Washington University Law School, J.D. (2012) with honors


View More


Litigation & Trial

Mass Tort, Product, and Consumer Litigation

Toxic Tort Litigation

Show more practices…

  • National coordinating counsel for a major construction and mining machinery manufacturer and a telecommunications company involved in asbestos litigation.
  • National counsel for an oil company involved in MTBE litigation
  • Successful trial defense of a brake manufacturer in Los Angeles County Superior Court against the backdrop of a $3 million settlement demand.
  • Defending a pesticide manufacturer in one of the first lawsuits alleging that bee colonies were destroyed by an insecticide product used by local farmers. The case litigated to the expert stage and included significant scientific workup to defend the product and its active ingredient.
  • Representing a Swiss inhalation toxicologist in attempts to “tag” the scientist for a U.S. deposition based on attendance at a Virginia conference. The trial court rejected the subpoena, a decision affirmed by the Virginia Supreme Court.
  • Representation of clients involved in asylum proceedings.
The Best Lawyers in America 2023 Recognizes 54 Crowell & Moring Attorneys, Three Selected as Lawyer of the Year (August 18, 2022)
Firm News / Announcement
"NY Court of Appeals Reaffirms Plaintiffs’ Burden to Establish “Sufficient Exposure” to Prove Causation in Toxic Tort Cases," Mass Tort, Product, and Consumer Litigation Alert (May 5, 2022). Contacts: Peter C. Condron, Clifford J. Zatz, Kieran J. Tuckley
Client Alert / Newsletter
Crowell & Moring Elects Nine New Partners and Promotes 18 to Counsel Positions (January 4, 2021)
Firm News / Announcement
"Genetics: A Path To Resolving Asbestos Litigation?," Westlaw (November 9, 2020). Authors: William L. Anderson, Peter C. Condron, and Kieran J. Tuckley.
"How Much Is Enough? A Judicial Roadmap to Low Dose Causation Testimony in Asbestos and Tort Litigation," Mass Tort, Product, and Consumer Litigation Alert (May 13, 2019). Contacts: Kieran J. Tuckley, William L. Anderson
Client Alert / Newsletter
"How Much Is Enough? A Judicial Roadmap to Low Dose Causation Testimony in Asbestos and Tort Litigation," American Journal of Trial Advocacy, Vol. 42:39 (2018). Authors: William L. Anderson and Kieran J. Tuckley.
"The Any Exposure Theory Round III: An Update on the State of the Case Law 2012-2016," Defense Counsel Journal, Vol. 83, No. 3, pp. 264-285 (July 2016). Authors: William L. Anderson and Kieran J. Tuckley.
"The 'Any Exposure' Theory Round II -- Court Review of Minimal Exposure Expert Testimony in Asbestos and Toxic Tort Litigation Since 2008," Kansas Journal of Law & Public Policy (Fall 2012). Co-Authors: William L. Anderson, Lynn R. Levitan, and Kieran J. Tuckley.
"Pennsylvania Supreme Court Excludes Any Exposure Theory in Asbestos and Toxic-Tort Litigation," Federalist Society State Court Docket Watch (Summer 2012). Co-Author: William L. Anderson and Kieran J. Tuckley.
"State High Court Rejects 'Any Fiber' Asbestos Liability Theory," Washington Legal Foundation Legal Opinion Letter, Vol. 21 No. 14 (June 22, 2012). Co-Author: William L. Anderson and Kieran J. Tuckley.

For all Highlights, News & Knowledge, please click here to view desktop bio.

Crowell & Moring LLP is an international law firm with offices in the United States, Europe, MENA, and Asia that represents clients in litigation and arbitration, regulatory and policy, and transactional and corporate matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation and government-facing matters, as well as its ongoing commitment to pro bono service and diversity, equity, and inclusion.

View Desktop Site | Mobile Sitemap |

Contact | Subscribe | Terms of Use | Privacy Statement | Alumni

© Crowell & Moring LLP 2023
Attorney advertising - prior results do not guarantee a similar outcome.