Home to an experienced team of practitioners, bringing experience from the DoJ and EPA to the Sidley Austin LLP environmental, health, and safety group has allowed the firm to maintain a broad regulatory practice. The team has benefited from the arrival of Jason Mills and Alana Genderson from Morgan, Lewis & Bockius LLP in March 2025, strengthening the firm’s OSHA capabilities. Timothy Webster lends his experience to clients on civil and criminal environmental enforcement defense, whereas Justin Savage is recommended for his work for regulated industries, including auto, chemicals, and data centers. Chicago’s Byron Taylor advises clients following environmental incidents, combining this with expertise on the Clean Air Act and Clean Water Act. The three co-lead the practice, with Webster and Savage operating out of Washington DC, alongside Peter Whitfield, a key contact for environmental issues during the project development process, and compliance and enforcement expert Andrew Stewart. Elsewhere in the DC office, Brittany Bolen counsels clients on federal funding and voluntary programs, while over in Los Angeles, Maureen Gorsen covers enforcement defense and regulatory compliance.
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Key clients
- American Fuel and Petrochemical Manufacturers
- Amsted Rail
- Specialty Equipment Market Association
- National Truck Equipment Association
- Cenovus Energy
- California Fuels & Convenience Alliance
- CHS Inc.
- American Fuel and Petrochemical Manufacturers
- Amsted Rail
- Specialty Equipment Market Association
- National Truck Equipment Association
- Cenovus Energy
Work highlights
Secured a victory in the U.S. Supreme Court for the American Fuel and Petrochemical Manufacturers (AFPM), the fuel trade association, in a high-profile challenge to the EPA’s approval of California regulations requiring automakers to manufacture more electric vehicles.
Representing Amsted Rail in a lawsuit filed under the Clean Air Act (CAA) in federal district court in the Southern District of Ohio. The claims arise under the CAA New Source Review (NSR)/Prevention of Significant Deterioration (PSD) program related to Amsted’s steel foundry in Groveport, Ohio.
Handling several enforcement matters for energy investment clients that pose massive financial and operational risk to several of the company’s assets across the country, involving compliance and enforcement issues associated with refinery emissions, safety, and programs under the Clean Air Act (CAA) including the Risk Management Program and Benzene Waste Operations component of the National Emission Standards for Hazardous Air Pollutants Rule (NESHAP).
Practice head
Timothy Webster; Justin Savage; Byron Taylor
Other key lawyers
Peter Whitfield; Andrew Stewart; Brittany Bolen; Maureen Gorsen; Samuel B. Boxerman