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 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. Her experience includes negotiating and obtaining permits for complicated energy and development projects, counseling clients on administrative rulemaking, internal investigations, policy and regulatory clarifications, and drafting federal and state legislation. As leader of the firm’s environmental practice, Deidre also assists clients with novel issues related to energy transition and renewable energy and clean power projects. This includes navigating permitting, regulatory, and compliance standards for the development and transmission of new energy sources and the retirement of traditional energy sources. 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. Deidre also 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 > Environment > Environment: regulatory

(Leading lawyers)

Deidre Duncan – Hunton Andrews Kurth LLP

The environmental team at Hunton Andrews Kurth LLP offers coast-to-coast expertise on environmental policy debates, regulatory developments, and litigation. It is particularly strong in issues relating to air, water, waste, chemicals and climate change at the state, local, and federal level. The team is led by Eric Murdock and Deidre Duncan, with Duncan offering strong experience in compliance and permitting, particularly in relation to the CWA, and also the national environmental policy act (NEPA) and ESA. Matthew Leopold is former general counsel for the EPA and is experienced in shaping environmental law; he is strong in air quality, chemicals and hazardous substances matters. Kerry McGrath is experienced in National Historic Preservation Act (NHPA) matters and water issues, with a focus on the mining, agriculture, and utilities sectors. In San Francisco, Shannon Broome is a name for risk management and ESG matters and environmental matters relating to California, while counsel Clare Ellis advises clients on California’s emissions laws, policy matters and CAA matters. Chuck Knauss is recommended for compliance, enforcement and litigation. Attorneys are based in Washington DC unless otherwise stated.


United States > Energy > Energy regulation: oil and gas

Hunton Andrews Kurth LLP represents integrated oil and gas companies, natural gas pipeline companies, producers and developers of LNG facilities before the FERC, as well as the EPA and the DOE. This includes handling investigations and rate cases, in addition to all aspects of environmental issues surrounding oil and gas permitting, construction and operations. In the firm’s Washington DC office, environmental law expert Deidre Duncan jointly leads the team alongside Dallas-based Myles Reynolds, who frequently acts for natural gas utilities and midstream companies. San Francisco’s Shannon Broome is another key contact in the group.

United States > Environment > Environment: litigation

(Leading lawyers)

Deidre DuncanHunton Andrews Kurth LLP

Hunton Andrews Kurth LLP offers clients broad expertise in environmental litigation, which includes experience in in air, water, natural resources, waste, chemicals, and climate change. It stands out for its representation of industry associations on regulatory compliance and enforcement defense, as well as policy issues, with a focus on the chemicals sector. The firm has considerable experience of multijurisdictional cases and is also active in the oil and gas, automotive and manufacturing industries. The team is led out of Washington DC by Eric Murdock and Deidre Duncan, with Duncan a key name for water and natural resources matters, and compliance and permitting issues, including those pertaining to the CWA, NEPA and the Endangered Species Act (ESA). San Francisco’s Shannon Broome focuses on ESG and climate change matters and is recommended for risk management and litigation, with over 30 years’ experience. William Brownell is also based in DC and has a strong track record in environmental litigation in cases before the US Court of Appeals and the US Supreme Court.

United States > Energy > Energy litigation: oil and gas

Hunton Andrews Kurth LLP represents integrated oil and gas companies, natural gas pipeline companies, natural gas producers and developers of LNG facilities on a broad range of disputes. The energy litigation practice regularly acts for clients before FERC, as well as appellate courts, federal bankruptcy courts and state courts. The team advises on all aspects of environmental issues relating to oil and gas permitting, construction, operation and maintenance, as well as defending against administrative, civil and criminal enforcement matters. Additionally, audits, compliance and enforcement issues are commonly handled by the group, as well as oil pipeline regulatory mandates. Washington DC-based Deidre Duncan, who specialises in natural resources and water law, leads the practice alongside Dallas’ Myles Reynolds, who acts for natural gas utilities and midstream companies, and Houston-based Michael Morfey.