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Clifford Chance

Clifford Chance
Hailey Hennessey

Hailey Hennessey


Hailey Hennessey

Hailey Hennessey is an associate in the Corporate practice of Clifford Chance's Houston office. Hailey focuses her practice in energy and infrastructure transactions, including mergers and acquisitions, divestitures, investments, joint ventures, project developments, and general corporate matters. She has significant experience in complex transactions involving traditional oil and gas (upstream, midstream, downstream) along with energy transition matters.

Energy Transition

  • Advised TotalEnergies in its renewable natural gas (RNG) joint venture with Vanguard Renewables
  • Advised Marathon Petroleum Corp. in the formation of a joint venture with Neste to convert Marathon’s idled refinery in Martinez, California into a 730 million gallons per year renewable fuels facility. The multi-year project is structured as a 50/50 joint venture with Neste expected to contribute a total of US$1 billion, inclusive of half of the total projected project development costs through the completion of the project.
  • Advised SER Capital Partners portfolio company Perfect Power Solutions Texas, LLC in the sale of a portfolio of eight solar and energy storage assets in Texas to Gore Street.

Traditional Oil and Gas

  • TotalEnergies in connection with its PIPE investment in NextDecade Corporation and investment in the Rio Grande LNG (RGLNG) Project, a planned US$18 Billion natural gas liquefaction project in South Texas.
  • Major financial services company in its approximate US$840 million transaction for the purchase and financing of natural gas assets located in Pennsylvania and West Virginia.

Additional M&A and Investment Representations

  • Advised Czechoslovak Group in its US$1.91 billion acquisition of Vista Outdoor Inc.'s Sporting Products business.
  • Advised ABS Group of Companies, Inc. in the sale of ABSG Consulting, Inc. of its technical service line to Apave Group, an international inspection Group.

News and client work

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Contact details

Career and qualifications

  • The University of Texas at Austin (BBA) 2017
  • University of Notre Dame (JD Cum Laude) 2021
  • Admitted as an Attorney-at-Law in Texas 2021
  • Joined Clifford Chance 2023