Claire M. Williams

I advise clients on energy and environmental regulatory matters, advocating for their interests in rulemakings and proceedings before regulatory commissions and negotiating with state regulators on compliance issues. My experience includes drafting and negotiating natural gas purchase and sale agreements under NAESB standard forms and counseling on compliance with energy development and extended producer responsibility laws across multiple jurisdictions. I also guide clients on environmental compliance and enforcement matters, including emerging environmental justice considerations.

I advise clients on the environmental aspects of energy project development, from early-stage diligence through permitting and approval. My practice focuses on identifying and managing environmental risks, including conducting due diligence reviews of environmental and permitting materials and advising on project siting, impacts, and compliance considerations. I work closely with project teams to navigate environmental review processes and support successful outcomes in state and local permitting proceedings, including before Public Utilities Commissions.

I also counsel clients on emerging environmental issues, including the rapidly evolving landscape of PFAS regulation at both the state and federal levels. My work includes advising on investigation and sampling considerations, regulatory compliance, and potential liabilities, as well as restrictions affecting PFAS in consumer products. I bring a practical, solutions-oriented approach to helping clients manage environmental risk while advancing project and business objectives.