Ellen M. Conley

Ellen Conley is a partner in the Energy, Power and Natural Resources Practice Group in the Houston office of Haynes Boone. She handles energy finance matters, as well as the acquisition and disposition of oil and gas properties. Ellen represents banks, private capital providers, and upstream and midstream energy companies on traditional debt and non-traditional financing transactions. She also assists oil and gas companies in acquisition and divestiture transactions through asset or equity sales, and with operational matters, including the review and negotiation of industry agreements. Ellen has also been involved in several exploration and production bankruptcies and restructurings.

Ellen is also co-chair of the Haynes Boone Energy Finance Practice Group, where she helps lead the firm’s energy finance initiatives and advises clients on complex financing structures in the energy sector.

Ellen was recognized by Oil and Gas Investor (a publication of Hart Energy) as one of the “Top Forty Under 40” in the energy industry in 2025, was selected for inclusion in Thomson Reuter’s Texas Super Lawyers Rising Stars for Energy and Natural Resources since 2023, and has been included in the "Ones to Watch" category of The Best Lawyers in America since 2021.  

Ellen is an adjunct professor at South Texas College of Law Houston and taught "Transactional Skills – Oil & Gas" in Spring 2024. She also serves on the Thomson Reuters Practical Law Oil and Gas Advisory Board.