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Desktop Image: O'Neil, Shannon
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Shannon E. O'Neil

Counsel

T 202.973.4209 Washington, D.C.
When it comes to navigating the energy transition, the current's on my side.
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Shannon's cross-sector experience allows her to offer insights that others might miss and present viewpoints that others simply can't. As a member of DWT's energy practice group, she draws on her prior experience with the Federal Energy Regulatory Commission (FERC) to help clients cut through the chop of the evolving energy regulatory environment, while always keeping an eye on the horizon for what's next.

During her time as an attorney in FERC's Office of the General Counsel, Shannon led multidisciplinary teams addressing critical issues related to hydropower and natural gas infrastructure. She also represented the Office of the General Counsel in Commission matters and meetings with regulated entities.

Since transitioning to private practice, Shannon has leveraged her FERC experience to support clients in the electric utility, hydropower, technology, financial services, and natural gas sectors. As key industry players seize the opportunities presented by the energy transition and navigate its challenges, Shannon is there, helping them to not just keep pace, but to power ahead.

Electric Transmission Rates and Interconnection Access

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Hydropower Licensing and Compliance

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Natural Gas Transportation and Policy

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Admitted to Practice

  • North Carolina
  • District of Columbia
  • U.S. District Court of Appeals, D.C. District

Education

  • J.D., University of North Carolina School of Law, 2017
    • Editor in Chief, North Carolina Journal of Law & Technology
    • Member, Environmental Appellate Advocacy Team
    • Symposium Editor, Environmental Law Project
  • B.A., Environmental Studies and Economics, University of North Carolina at Chapel Hill, 2014
    • Lettering Athlete, Varsity Women's Rowing Team
    • Attendee, Cambridge Summer Programme in International Energy Policy & Climate Change Risk Assessment

Memberships & Affiliations

    • Fellow, Leadership Council on Legal Diversity (LCLD), 2025
    • Energy Bar Association
    • D.C. Chapter, Women's Energy Network
    • Women in Environmental & Energy Law, National Association of Women Lawyers
    • Women in Climate Investing & Finance

Professional Recognition

    • Named "One to Watch" by Best Lawyers in Energy Law, 2024-2026
    • Named to "Capital Pro Bono Honor Roll" by the D.C. Court of Appeals and the D.C. Superior Court, 2022 (High Honors), 2024

Background

    • Attorney-Advisor, 2018-2020; Law Clerk, 2017-2018; Legal Intern, 2016 – Energy Projects, Office of the General Counsel, Federal Energy Regulatory Commission, Washington, D.C.
    • Legal Extern, U.S. Attorney's Office, Eastern District of North Carolina, Raleigh, N.C., 2017
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