William Doffermyre

William L. Doffermyre serves as the Solicitor of the U.S. Department of the Interior, the department’s chief legal officer and principal advisor to the Secretary on legal matters. As Solicitor, Mr. Doffermyre manages over four hundred Department attorneys within the Office of the Solicitor and across the diverse spectrum of mission-oriented bureaus and offices within the Department, including the Bureau of Land Management, Bureau of Ocean Energy Management, Office of Surface Mining, United States Fish & Wildlife Service, and National Park Service, among others. In addition to serving as Solicitor, Mr. Doffermyre is a member of the Department’s Artificial Intelligence (AI) Governance Board and represents the Department on the White House’s AI Working Group to advance government-wide AI initiatives and best practices.

Mr. Doffermyre joined the Administration in February 2025 as a Senior Advisor to the White House’s National Energy Dominance Council (NEDC) within the Executive Office of the President, established under Executive Order 14213 to advance the Administration’s energy policy agenda. Before joining the Trump Administration, Mr. Doffermyre worked at Energy Transfer, a Fortune 100 midstream energy company headquartered in Dallas, Texas, where he led Energy Transfer’s Alternative Energy Group and served as General Counsel of Lake Charles LNG Export Company.

During the first Trump Administration, Mr. Doffermyre served as the Vice President & General Counsel and member of the Investment Committee of the Overseas Private Investment Corporation (OPIC), the United States’ development finance institution. While serving at OPIC, Mr. Doffermyre successfully advanced a bi-partisan effort to modernize and transform OPIC into what is now the United States International Development Finance Corporation (DFC). Earlier in his career, Mr. Doffermyre was a partner at Williams & Connolly LLP in Washington D.C., specializing in high-stakes civil and criminal litigation, with a particular focus on energy sector cases.

Mr. Doffermyre is a proud graduate of the University of Virginia College of Arts & Sciences and School of Law, and former law clerk to the Hon. D. Brock Hornby of the United States District Court for the District of Maine.

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