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Sigourney R. Haylock

Phone: +1 213.443.5527
515 South Flower St., 40th Floor
Los Angeles, CA 90071-2201

Sigourney Haylock is an associate in Crowell & Moring’s Los Angeles office and is a member of the firm’s Commercial Litigation and Mass Tort, Product, and Consumer Litigation groups. Her practice focuses on representing corporate clients in complex civil litigation and medical device manufacturers in product liability litigation.

Sigourney received her J.D. from Loyola Law School where she served as a Note and Comment Editor for the Loyola of Los Angeles Law Review and as a Certified Law Student for Loyola’s Youth Justice Education Clinic. While in law school, Sigourney worked as a judicial extern for the Honorable André Birotte, Jr. in the United States District Court for the Central District of California. She graduated from the University of California, Santa Barbara where she received a B.A. in environmental studies and a minor in global peace and security.


  • University of California, Santa Barbara, B.A. (2012)
  • Loyola Law School, Los Angeles, J.D. (2017)


Admitted to practice: California

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Crowell & Moring LLP is an international law firm with more than 500 lawyers representing clients in litigation and arbitration, regulatory, and transactional matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation, as well as its ongoing commitment to pro bono service and diversity. The firm has offices in Washington, DC, New York, Los Angeles, San Francisco, Orange County, London, and Brussels.

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