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Pillsbury Pillsbury Pillsbury
Washington, DC
2300 N Street, NW
Washington, DC 20037-1122
Tel. +1.202.663.8148
Fax. +1.202.663.8007
District of Columbia
State of Maryland
J.D., Yale Law School, 1976
United States Navy Nuclear Power School, 1969
B.S., United States Naval Academy, 1968
with distinction


John H. O'Neill, Jr.

John H. O'Neill, Jr.

John O’Neill is a partner in Pillsbury’s Energy practice and a member of the law firm’s board. He has represented clients in nuclear energy matters since 1976. He represents electric utilities and companies in the nuclear industry in major commercial transactions, regulatory proceedings, and dispute resolution matters. He and the Pillsbury team are advising a significant number of electric utilities and nuclear companies on the development of new nuclear power facilities during the ongoing nuclear renaissance. Mr. O’Neill has extensive experience in domestic and international transactions involving the acquisition and sale of power plants, major plant components, nuclear fuel and services. He has represented foreign governments and international clients on major international nuclear procurements and is currently working with international clients on investments and regulatory requirements in the U.S. nuclear energy market.

Prior to practicing law, he was an officer in the U.S. Navy, serving on nuclear submarines. He was licensed by the Atomic Energy Commission to supervise the operation and maintenance of naval nuclear propulsion power plants.

Honors & Awards
  • Chambers Global, Energy: Nuclear-Regulatory & Litigation—USA (2007-2014)
  • Chambers USA, Energy: Nuclear-Regulatory—National (2005-2014)
  • Best of the Best USA, Energy & Natural Resources, Euromoney/Legal Media Group (2008, 2010)
  • Guide to the World's Leading Energy and Natural Resources Lawyers, Euromoney/Legal Media Group (2007)

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