Sheila Slocum Hollis


Sheila Slocum Hollis is chair of the Washington, D.C. office, and was the office's founding managing partner, as well as the founding practice group leader for the firm's Energy, Environment and Resources Practice Group. She served on the firm's Executive Committee for more than a decade and the Partners Board for 18 years. Ms. Hollis practices in the areas of energy transactional and regulatory law and international and administrative law before government agencies, Congress, state and federal courts, and other entities. She focuses on domestic and international energy, water and environmental matters, representing governmental bodies and the power and natural gas industries. 

Ms. Hollis has served twice in Federal service. She was the first director of the Office of Enforcement of the Federal Energy Regulatory Commission, establishing the office and its policies and procedures, serving from 1977 to 1980. Those policies and procedures remain in place today. She began her energy law career as a trial lawyer at the Federal Power Commission from 1974 to 1975, serving as lead counsel on the Pennzoil-United spinoff case. Over the course of her career, she has played a key role in the formation and implementation of energy law and policy. As a Professorial Lecturer in the Law at George Washington University School of Law, she has taught energy law for 20 years to over 600 students in the Environmental and Energy Law Program and was recently recognized by the school for her teaching contribution. Ms. Hollis is widely published in energy law and policy matters, having co-authored two energy law texts and numerous articles on energy policy, energy enforcement, natural gas, independent power and cogeneration, hydroelectric energy regulation and related environmental topics.  

With a long and venerable career representing clients in matters relating to infrastructure, natural gas development transportation and distribution, energy reliability, enforcement and compliance, and international energy policy, Ms. Hollis has received many honors and recognitions from the legal industry. Most recently, she was named by Super Lawyers as one of Washington D.C.'s Top 100 Lawyers overall and one of the Top 50 Women. She is the first energy lawyer to be named to this list. In addition, Ms. Hollis was recognized by the American Bar Association "(ABA)" as a "Trailblazer" for women in law. She was among only 100 women to be so honored for breaking barriers for women in cutting-edge law. Her personal story is now at the Library of Congress, Harvard Law and Stanford Law libraries. In 2012, Ms. Hollis was inducted as a Fellow into the American College of Environmental Lawyers, an honor bestowed upon a select group of lawyers with "distinguished experience and high standards." Ms. Hollis was also named one of the "50 Key Women in Energy Worldwide" and received the 2011 Lifetime Achievement in Energy in Platt's Global Energy Awards. She is the first attorney in private practice to receive the Platt's Award. Ms. Hollis has also been ranked by The National Law Journal as one of the United States' top 20 energy lawyers and has received the highest possible rating from Martindale-Hubbell's Peer Review Ratings for over 25 years for professional excellence. 

In addition, Ms. Hollis is listed in many biographical directories such as Chambers USA: America's Leading Lawyers for Business, Who's Who in America, Who's Who in the World, The World's Leading Oil and Gas Lawyers, and The World's Leading Project Finance Lawyers. Ms. Hollis was selected for inclusion in Who's Who Legal Directory for Oil and Gas. (The attorneys included in this publication were selected based upon comprehensive, independent survey work with both general counsel and oil and gas lawyers in private practice worldwide. Only specialists who have met independent international research criteria are listed.)

Ms. Hollis has served on a myriad of boards, committees, and professional associations over the course of her career and has been extremely active in a leadership role in many of those organizations. Since 2015, she has chaired the Standing Committee on the Law Library of Congress of the ABA. She was the first woman to serve as President of the Energy Bar Association and holds the distinction of being the only person to serve as both President of the Energy Bar Association and Chair of the ABA's Section of Environment, Energy and Resources ("SEER"), the leading forum for thousands of lawyers working in areas related to the environment, natural resources, and energy. She now serves in the House of Delegates of the ABA as Senior Delegate from SEER. She also served as President of the Women's Council on Energy and the Environment for five years and served on the board of the Women's Bar Association of the District of Columbia.

In addition, Ms. Hollis is Treasurer and a board member of the United States Energy Association and chaired its nominating committee. She also is a member of the Advisory Committee of the North American Energy Standards Board. Ms. Hollis serves on the Board of Trustees of the Center for American and International Law and was vice chair of its Institute for Energy Law. With an extensive background in international energy law, Ms. Hollis is admitted as an honorary, international member of the Commercial Bar of England and Wales. She serves on the Board of the American Friends of the Royal Society, which is one of the oldest scientific bodies in the world. Ms. Hollis was honored to be chosen as a delegate of the ABA to the United Nations Rio+20 Conference in 2012. Ms. Hollis also served a three-year term on the Standing Committee on the Federal Judiciary and in that capacity was one of the two primary investigators in the nomination of Justice John Roberts to the Supreme Court. She is a Life Fellow of the ABA and has been a member of the American Law Institute for twenty-five years.

Ms. Hollis is admitted to practice in the District of Columbia and Colorado. She is a Colorado native and a graduate of the University of Denver College of Law as well as the University of Colorado at Boulder, cum laude in general studies and with honors in journalism. 

Representative Matters

  • Advises major LNG developer on $2 billion project in Puerto Rico.
  • Represented numerous clients in investigations related to natural gas and oil development, trading, transportation and other energy and environmental activities.
  • Advised a large institutional investor in its $1.3 billion investment in Freeport LNG's $4 billion construction project to build the first two trains of its natural gas liquefaction and LNG loading facility on Quintana Island near Freeport, Texas.
  • Provided federal energy regulatory advice and Texas specific corporate and real estate advice with respect to a $1.3 billion equity funding for proposed natural gas liquefaction and a LNG loading facility.
  • Worked extensively with a major IPP developer on projects for major conversions to natural gas fired generation in Mexico, Northern Ireland, England.
  • Pursuant to World Bank project, developed the oil and gas code and accompanying model contracts in a three year project for the government of Ethiopia.
  • Represented the town of Plymouth, Massachusetts in a multi-year, $100 million Payment in Lieu of Taxes (PILOT) agreement with Entergy Nuclear Generation Co., owner of the Pilgrim Nuclear Generating Station.
  • Represented several local distribution companies and pipelines in LNG and other natural gas regulatory and contractual issues.
  • Significant experience with FERC enforcement/compliance investigations and related negotiations and ultimate resolutions by settlement.
  • Involved in ongoing series of negotiations regarding host states and communities in environmental, emergency planning, tax, community relations and public policy relating to extremely large electric generating facilities, with a particular focus on nuclear facilities.
  • Participated in series of major internal investigations for public utility or other regulated energy entities.
  • Representation of energy clients regarding siting, funding and financial structuring of generating and other types of energy facilities.
  • Arbitrator in major energy tax dispute.
  • Represent clients in development of trading platforms for renewable energy credits.
  • Representation of clients in large corporate restructurings and acquisitions in FERC regulatory matters.
  • Representation of clients in hydroelectric licensing issues.
  • Advises clients on electric reliability related matters involving NERC/FERC requirements, including acting as lead investigator for an electric grid in a Congressional investigation of a major blackout.
  • Representation of clients on large LNG developments domestically and internationally.
  • Represent smart-grid component high-tech developers at FERC and in NIST issues.
  • Represent regional transmission organization on market monitoring and internal investigations.
  • Represent regional transmission organization in major Congressional investigations.
  • Represent a variety of clients in natural gas pipeline certificate matters.
  • Represent a state in a variety of energy policy issues.
  • Advise sureties in complex multiyear, billion-dollar lawsuit related to gas trading issues.
  • Advise on numerous energy development issues.
  • Advise large electric cooperative on certain gas and electric matters.
  • Successfully represented the District of Columbia in a key electric reliability matter.
ABA FellowACOEL American College of Environmental Lawyers

Professional Activities

  • Federal Bar Association
    - Chair, Energy, Environment and Natural Resources Section, 2012-2016
  • American Bar Association
    - Representative to the House of Delegates for Section of Environment, Energy, and Resources, 1995-present
    - Chair, Section of Environment, Energy, and Resources, 2000-2001
    - Chair, Standing Committee on Environmental Law, 1997-2000
    - Chair, Coordinating Group on Energy Law, 1990s
    - Chair, Council for the Fund for Justice and Education, 2006-2009
    - Chair, Standing Committee on Silver Gavel Awards, 2009-2012
  • Energy Bar Association
    - President, 1991-1992
    - EBA Representative to the ABA's House of Delegates, 1992-1993
  • ABA Journal Board of Editors
    - Chair, Board of Editors, 2007-2010
    - Board Member, 2001-2007
  • Member, International Bar Association
  • Member, American Law Institute, 1992-present
  • Life Member, Women's Bar Association of DC
    - Board of Trustees, 2007-2009
  • Member, Women's Council on Energy and Environment
    - President, 1997-2002
  • Member, International Women's Forum, 2014-present
  • Member, Association of Women in Water, Energy and Environment, 2005-2015
  • Fellow, American College of Environmental Lawyers, 2012-present
  • Member, The District of Columbia Bar, Environment, Energy and Natural Resources Section
    - Steering Committee, 1991-1992
  • Eastern Mineral Law Foundation
    - Trustee, 2007-2009
  • International Oil and Gas Law Center
    - Vice President, 1995-2011
  • Honorary Overseas Member, the Commercial Bar Association of England and Wales, 2005-present
  • Advisory Board, Public Utilities Fortnightly
  • ALI CLE Environmental Law Advisory Panel, 2013-present
  • Professorial Lecturer in the Law, "Energy Law," The George Washington University School of Law, 1979-1999
  • Delegate, World Justice Project, (leader of a global movement to strengthen the rule of law for the development of communities of opportunity and equity)


  • Colorado
  • District of Columbia
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit
  • Supreme Court of Colorado
  • Supreme Court of the United States


  • University of Denver College of Law, J.D., 1973
  • University of Colorado, B.S., Journalism, cum laude and with honors in overall studies, 1971
  • University of Exeter


  • Duane Morris LLP
    - Member, Partners Board
    - Chair, Washington, D.C. Office
    - Member, Diversity and Inclusion Committee (2005-present)
    - Partner, 1997-present
    - Founding Partner, Washington Office and of the Duane Morris Energy, Environment and Resources Practice Group (1999-2005)
  • Metzger, Hollis, Gordon & Alprin, Washington, D.C.
    - Senior Partner, 1992-1997
  • Vinson & Elkins L.L.P., Washington, D.C.
    - Partner, 1987-1992
    - Head of Washington office Energy Practice
  • Broadhurst, Brook, Mangham and Hardy, Washington, D.C.
    - Partner, 1984-1987
  • Butler & Binion, Washington, D.C.
    - Partner, 1980-1984
  • Office of Enforcement of the Federal Energy Regulatory Commission,
    Washington, D.C.
    - First Director, 1977-1980
  • Charter Member, Senior Executive Service, U.S. Government, 1979-1980
  • Wilner & Scheiner, Washington, D.C.
    - Associate, 1975-1977
  • Federal Power Commission, Washington, D.C.
    -Trial Attorney, 1974-1975

Board Memberships

  • Center for American and International Law
    - Board of Trustees, 1990-present
  • National Sustainability Advisory Committee, KB Homes, 2008-present
  • Today's General Counsel Magazine
    - Editorial Advisory Board, 2004 - present
  • Law360
    - Energy Editorial Advisory Board, 2017 - present
  • Board of Directors and Treasurer, United States Energy Association, 2000-present
  • American Friends of the Royal Society, Board Member, 2000-present
  • Women's Council on Energy and Environment- President, 1998-2000

Honors and Awards

  • Recognized as ABA "Trailblazer" for Women in Law in 2017
  • Named Top 100 Lawyers in Washington, D.C. by Super Lawyers in 2017
  • Recipient, Offshore Excellence Award, Acquisition International, 2016
  • Recipient, American Lawyer, "Global Finance Deal of the Year in Project Finance," Global Legal Awards, New York, 2015 (LNG deals)
  • Listed for multiple years in Who's Who Legal: Energy, Who's Who in America, Who's Who in American Law, Who's Who in American Women, Who's Who in Business and Finance, and Who's Who Legal Directory for Oil and Gas
  • Listed in The International Who's Who of Oil & Gas Lawyers, Business Lawyers, and Energy Lawyers
  • Recognized in Chambers USA: America's Leading Lawyers for Business, 2008-2017
  • Recognized in Washington, D.C. Super Lawyers Top 50 Women, 2014, 2015, 2017
  • Recipient, Bar Register of Preeminent Women Lawyers, Martindale-Hubbell
  • Listed for multiple years in Guide to the World's Leading Banking Finance and Transactional Lawyers in the Project Finance section,
  • Listed for multiple years in Guide to the World's Leading Women in Business Law
  • Listed in InterContinental Finance Magazine's Leading Lawyers 500, 2013
  • Selected repeatedly as Top Rated Lawyer in Energy, Environmental, and Land Use Law by American Lawyer Media and Martindale-Hubbell
  • Recipient, Cheryl Blackwell Bryson Leadership Award, Duane Morris Women's Initiative, October 2012
  • Recipient, Outstanding International Alumni, University of Denver Sturm College of Law, April 2012
  • Recipient, Lifetime Achievement in Energy Award, 13th Annual Platts Global Energy Awards, December 2011
  • Recipient of the Paul Nordstrom Service Award for her contributions to the legal profession and the community from the Energy Bar Association and the Charitable Foundation of the Energy Bar Association, 2010
  • Recognized by the University of Denver College of Law in July 2007 as an outstanding International Law graduate
  • Named to Legal Media Group's Guide to the World's Leading Project Finance Lawyers
  • Honored as one of the "Key Women in Energy-Americas" for 2003. This award identifies, recognizes and honors excellence in individual performance in the energy industry for North, South and Central America
  • Honored as one of the "50 Key Women in Energy in the World" for 2002. Ms. Hollis was named in the Legal Excellence category for her leadership on behalf of peers and clients in the energy community. Honorees were selected by a global panel of energy industry experts
  • Named "Woman of the Year" by the Women's Council on Energy and the Environment ("WCEE") for 2003. Honorees are selected each year by the Board of Directors of WCEE in the energy and/or environment field and honored for their exemplary leadership and special contributions to the advancement of women
  • Ranked by The National Law Journal as one of the United States' top 20 energy lawyers
  • AV Preeminent® Peer Review Rated by Martindale-Hubbell®, 1998-present

Selected Publications

Selected Speaking Engagements

  • Presenter, "Cybersecurity: What Every In-House Counsel Needs to Know (and Outside Counsel Should Tell Them)," Federal Bar Association, January 24, 2018

  • Speaker, tips for success for women in leadership capacities in the law firm setting as well as in government service, Women's Bar Association of DC, December 8, 2017

  • Speaker, "New Surge of Energy in the Americas: Renewables Developments, Deals and Disputes," ABA Section of International Law Fall Conference, Miami, Florida, October 25, 2017
  • Presentation on behalf of the U.S. Energy Association on U.S. energy policy as it is evolving in the North American context, World Energy Conference, Mexico City, September 11, 2017
  • Presenter "Emerging Energy Regulatory and Political Perspectives," Annual Meeting of the North American Energy Standards Board (NAESB), Houston, September 6, 2017
  • Speaker, "How to Conduct Free Legal Research Online," ABA Standing Committee on the Law Library of Congress, New York, August 11, 2017
  • Presenter, "Energy Structure and Resources of USA - Big, Political, Rich, Consequential, and Smothered by Law and Regulation," U.S. Energy Association, July 17, 2017
  • Presenter, "U.S. Shale and Deep Offshore Oil and Gas Production: What is the Future of the American Energy Market?," 3rd Washington Oil & Gas Forum, Washington D.C., June 7, 2017
  • Speaker, "Cyber Security: What Every In-House Counsel Needs to Know (And Outside Counsel Should Tell Them)," Federal Bar Association, Washington, May 4, 2017
  • Speaker, "Providing Predictability and Trust Along with Legal Knowledge," Legal Women's Forum, New York, February 2, 2017
  • Panelist, "I Wish Someone Had Told Me!," ACI Conference on Women Leaders in Environmental and Energy Law, New Orleans, January 20, 2017
  • Advisory Board Participant, University of Texas Center for Energy Economics, FDIC regional headquarters, Houston, December 7, 2016
  • Featured in Section Member Spotlight Podcast, American Bar Association Section of Environment, Energy and Resources, December 2, 2016
  • Speaker, American Bar Association Section of Environment, Energy and Resources Special Committee for Young Lawyers, Podcast, November 29, 2016
  • Speaker, "Clean Power Plan, the Paris Agreement on Climate, and the Impact of the U.S. Election on the Climate Change Agenda of the United States and Signers of the Paris Agreement," World Bank International Legislative Legal Meeting, Washington, November 18, 2016
  • Speaker, "Evolution of Energy Policy and Programs in Response to Sustainability and Clean Power Goals," Chairing Session, American Bar Association Environmental Energy & Resources Law Fall Conference, Denver, October 6, 2016
  • Speaker, "Energy Policy and International Legal Concerns and Questions," TerraLex Global Meeting, New York City, September 24, 2016
  • Speaker, "Uncertain Times in Energy and Implications for Insolvency," Annual Conference of the International Bar Association, Washington, D.C., September 21, 2016
  • Speaker, "Energy Policy, Clean Power Questions and Politics in 2016," Federal Bar Association Annual Meeting, Cleveland, September 15, 2016
  • Panelist, "Current Legal Challenges in Energy and Water Infrastructure Development," Webinar, August 11, 2016
  • Speaker, Women's Council on Energy and Environment, Electric Power Research Institute, Washington, D.C., November 6, 2015
  • Speaker, "Careers in Energy Law," Women's Bar Association (WBA), September 17, 2015
  • Panelist, "Mexico's Energy Reform is Rolling, Albeit with Training Wheels," America's Voice for Energy Podcast, July 23, 2015
  • Speaker, "Mexico's Energy Reforms — A Developing Destination for Investment," Women's Council on Energy and the Environment ("WCEE"), July 22, 2015
  • Presenter, ABA Women's Day on the Hill, American Bar Association, Washington, D.C., June 23-25, 2015
  • Keynote Speaker, Commercial Bar of England and Wales ("COMBAR") Spring Meeting at the United States Supreme Court, Washington, D.C., April 10, 2015
  • Speaker, "Hydraulic Fracturing Environmental Issues," Tulane University Law School 20th Environmental Law Conference, New Orleans, February 27, 2015
  • Moderator, "Supreme Court Roundup: Land, Air, Water and Jurisdiction" Panel, 44th ABA Super Conference on Environmental Law, San Francisco, March 26, 2015
  • Speaker, "Canadian and Cross-Border Oversight of the Canadian and U.S. Energy Markets," Canadian Oil Sands Summit, Calgary, AB, February 11, 2015
  • Speaker, Women Leaders in Environmental and Energy Law Conference, American Conference Institute, New Orleans, January 21, 2015
  • Speaker, "Small-to-Mid-Size Market Participants: Effectively Using Limited Resources While Complying with Constantly Evolving Regulations," American Conference Institute's 10th National Forum on Energy Trading Compliance & Regulation Enforcement, Washington D.C., November 21, 2014
  • Moderator, "A Time for Action: The Cost and Impact of Energy Infrastructure Delays on the Northeast Economy,", New England Canada Business Conference Annual Energy Program, Boston, November 13, 2014
  • Speaker, "Federal Energy Trends" and Chair, "Moving Forward with Co-Generation Projects," Fifth Annual Federal Energy Workshop and Defense Energy Partnership Forum, Washington, D.C., September 16, 2014
  • Panelist, "Energy Policy and Strategy," NAESB Board of Directors Meeting, Meeting of the Members & Strategic Session, Houston, September 11, 2014
  • Moderator, "Environment and War," Federal Bar Association's Annual Meeting and Convention, Providence, September 5, 2014
  • Panelist, "Ethical Considerations in Responding to FERC Investigations," Energy Bar Association, Houston, July 22, 2014
  • Speaker, "111(d) in Context: Broader Energy and Policy Implications," Environmental Law Institute's Workshop on EPA's Proposed Clean Power/CAA Section 111(d) Rules, Washington D.C., July 14, 2014