Rebecca H. Diffen

  • Adjunct Professor


  • JD University of Texas at Austin
  • BA Carleton College

Becky Diffen is an attorney in the Austin office of Vinson & Elkins where her practice focuses on energy transactions, project development, and energy regulatory law. She represents developers, private equity firms, investment banks, and a variety of other public and private companies in the renewable energy, power generation, and oil & gas industries on complex transactions including mergers and acquisitions, joint ventures, development projects, and project finance. She also has experience advising clients on Texas regulatory law. Becky has more than 14 years of experience in the power industry and previously worked as a utility-scale wind power developer. She has been recognized by Chambers USA, Legal 500, and Texas Rising Stars, serves as an adjunct professor at the University of Texas School of Law (where she teaches a seminar on electric power law), and is a co-author of Wind Law, the first wind law treatise, and Lexis Practice Advisor: Renewable Energy.