Photograph of Warren Lehrenbaum

Warren Lehrenbaum


Warren Lehrenbaum represents individual companies and trade associations before the U.S. Environmental Protection Agency (EPA), the United States Department of Agriculture (USDA) and the Food and Drug Administration (FDA), where he advocates on behalf of individual products as well as broad policy issues.

Warren serves as a member on the firm's Environment & Natural Resources Group Steering Committee. His practice focuses on chemical regulation and biotechnology issues arising under the Toxic Substances Control Act (TSCA), the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), the Food Quality Protection Act (FQPA), the Federal Food, Drugs and Cosmetics Act (FFDCA), the Emergency Planning and Community Right-to-Know Act (EPCRA), and related State and Federal laws. He assists large and small companies in the chemical and biotechnology fields obtain regulatory approvals for their products, and he helps clients address ongoing compliance and product stewardship issues. Warren's counseling in these areas typically involves issues such as: assisting manufacturers of chemical or biotechnology products understand their registration, premarket notification, testing and reporting obligations, and assisting manufacturers of crop protection products in protecting their data compensation rights. He also assists companies in their day-to-day compliance with pollution control obligations under the Clean Water Act, the Resource Conservation and Recovery Act (RCRA) and other statutes.

A substantial portion of Warren's practice is devoted to helping clients develop and implement corporate compliance programs, including environmental auditing programs and comprehensive environmental management systems. He also assists clients in identifying instances of potential non-compliance and defending against administrative investigations and enforcement actions. Warren has negotiated successful settlements in numerous enforcement cases, often involving complex supplemental enforcement projects (SEPs) and challenging economic benefit and BEN model issues.


  • Binghamton University (State University of New York), B.A. (1985)
  • The George Washington University Law School, J.D. (1989) with honors


Other Affiliations

American Bar Association; Environmental Law Institute

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Environment and Natural Resources



Product Risk Management

Proposition 65

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"2022 Pesticide Regulation Workshop," Household & Commercial Products Association, Washington, D.C. (October 19, 2022). Speakers: Michael Boucher, Peter Gray, Warren Lehrenbaum, and Amy Symonds.
"At the Forefront of Data Compensation," Pesticide Data Compensation and Protection in a Global Marketplace Workshop, Cary, North Carolina. (April 7, 2022). Speakers: Warren Lehrenbaum and Amy Symonds.
"Amended TSCA and Data Compensation," Pesticide Data Compensation and Protection in a Global Marketplace Workshop, Cary, North Carolina. (April 7, 2022). Speaker: Warren Lehrenbaum.
"Torts & Product Liability Issues," Crowell & Moring's Supply Chain Webinar Series (January 12, 2022). Speakers: Rebecca Baden Chaney, John Fuson, Cheryl A. Falvey, Warren Lehrenbaum, and Carolyn W. Wagner.
"EPA’s Shift In Chemical and Hazardous Materials Regulation and What Retailers Can Expect," Crowell & Moring’s Retail & Consumer Products Law Observer (October 27, 2021). Authors: Jennifer A. Giblin, Eryn Howington, and Warren Lehrenbaum.
"Chemicals & Hazmat Transportation," Retail Industry Leaders Association Consumer Products Committee Virtual Meeting (October 5 - 6, 2021). Speakers: Jennifer A. Giblin and Warren Lehrenbaum
"Regulatory Challenges Facing Pesticide Devices," Crowell & Moring Webinar (April 8, 2021). Presenters: Warren Lehrenbaum and Amy Symonds.
"A Guide To Evaluating And Advertising COVID-19 Products," Law360 (May 26, 2020). Authors: Christopher A. Cole, Warren Lehrenbaum, Chalana Netasha Damron, John Fuson, and Lauren Aronson.
"EPA Issues Policy On Conditions For Enforcement Discretion During the Coronavirus Crisis," (March 27, 2020). Contacts: David Chung, Paul Freeman, Warren Lehrenbaum, Thomas A. Lorenzen, Robert Meyers, Kirsten L. Nathanson, Byron R. Brown, Peter Gray
Client Alert / Newsletter
"Recent EPA Developments and Their Impact on Retailers," Crowell & Moring's Consumer Products Law Observer (March 25, 2020). Authors: Warren Lehrenbaum and Mimi S. Dennis.

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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.

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