Ms Deidre Duncan > Hunton Andrews Kurth LLP > Washington DC, United States > Lawyer Profile

Hunton Andrews Kurth LLP
United States

Work Department

Energy, Carbon Capture Utilization and Storage, Real Estate Investment and Finance, Transportation, Environmental, Natural Resources, Water, Energy, Pipeline, Coal, Extractive Industries: Mining & Mineral Processing, Oil & Gas, Energy Litigation, Renewable Energy and Clean Power, International Renewable Energy and Clean Power, Regulatory, National Environmental Policy Act, Water Quality, Wetlands, Groundwater, and Drinking Water


Partner and Head of the Environmental Practice


Deidre represents clients exclusively on environmental, energy and administrative law, with an emphasis on permitting, compliance and litigation regarding the Clean Water Act, the Endangered Species Act, the National Environmental Policy Act and other environmental statutes. Experience includes negotiating and obtaining permits for complicated energy and development projects, counseling clients on administrative rulemaking, internal investigations, and policy and regulatory clarifications, and drafting federal and state legislation. Her clients come from many of the nation’s key economic sectors, including development companies, oil and natural gas pipelines, mining, electric utilities, agricultural interests, state and local agencies and various trade associations. Prior to entering private practice, Deidre served as assistant general counsel of the Army at the Pentagon, advising the secretary of the Army on environmental and land use issues involving the Corps of Engineers’ Civil Works and section 404 Regulatory program, as well as the Base Realignment and Closure (BRAC) program. Deidre has extensive experience with federal regulatory agencies, military departments and the US Department of Justice.


Admitted to the District of Columbia Bar


  • JD, University of Cincinnati College of Law, Order of the Coif, 1996
  • BA, Duke University, cum laude, 1993

Lawyer Rankings

United States > Industry focus > Environment: litigation

Hunton Andrews Kurth LLP has a long history of acting in high-exposure environmental claims and has represented large energy, manufacturing, commercial real estate development, petroleum product terminating and mineral extractive industry clients in environmental litigation in the US and beyond. Covering all major federal and state environmental statutes, the team’s impressive track record includes significant Clean Air and Water Act matters, precedent-setting greenhouse gas public nuisance suits, complex enforcement defense proceedings involving chemicals, waste management and site clean-up. The environmental group is led out of Washington DC by Eric Murdock and Deidre Duncan, the latter of whom has a notable reputation in the oil and gas sector. Also in the DC office, Chuck Knauss maintains a broad base environmental practice, demonstrating particular strength in enforcement, permitting, risk management and climate change matters, while permitting natural resources mandates are core areas of activity for Kerry McGrath. Matthew Leopold, who also sits in the DC office, is ‘exceptionally skilled and an expert in environmental law‘, bringing to the table strategic insights as the former General Counsel for the US Environmental Protection Agency. The ‘world-class team of professionals‘ also includes Shannon Broome, who is a leading practitioner in landmark nuisance litigation in California. She is based in San Francisco and represents clients from the oil and gas, renewable energy and manufacturing industries.

United States > Industry focus > Environment: regulatory

(Leading lawyers)

Deidre Duncan – Hunton Andrews Kurth LLP

The highly specialised environmental law practice at Hunton Andrews Kurth LLP‘s provides comprehensive advice to its corporate client roster based in the United States and abroad, but is perhaps best known for its involvement in high-profile litigation, environmental rulemakings and regulatory developments. With a deep bench of lawyers in Washington DC and San Francisco, the practice is singled out for its experience with air-related matters, having advised numerous energy and chemicals clients on regulatory compliance, enforcement actions, policy issues, waste management and site clean-up. Furthermore, its broad service offering also covers multi-jurisdictional regulatory issues involving natural resources, climate change and water on behalf of clients from a myriad of industries, including manufacturing, real estate development and mining. The environmental group is jointly led by Washington DC-based Eric Murdock and Deidre Duncan, the latter of whom is a preeminent figure for water and natural resources regulations. Chuck Knauss, who maintains a broad environmental practice focused on the oil and gas, and transportation sectors, is another noteworthy practitioner in DC. Former general counsel for the US Environmental Protection Agency (EPA) Matthew Leopold is ‘incredibly knowledgeable and experienced‘ in major federal environmental statutes in the permitting, compliance and enforcement contexts. Also in DC, Kerry McGrath is frequently retained by major industrial groups in relation to matters under the federally regulated “waters of the United States” and NPDES permitting issues. On the West Coast, Shannon Broome is recommended for Clean Air Act matters, energy transition and climate change. She sits in San Francisco.

United States > Industry focus > Energy regulation: oil and gas

Hunton Andrews Kurth LLP regularly represents clients before various state regulatory bodies such as the Railroad Commission of Texas. The group handles the gamut of issues before the FERC as well as defending clients’ positions before appellate, federal bankruptcy and state courts. It also handles oil pipeline regulation under the ICA. Environmental law expert Deidre Duncan jointly leads the group with Myles Reynolds who represents natural gas utilities and midstream companies.