Becky H. Diffen

Becky H. Diffen Senior Associate, Energy Transactions

Becky’s practice focuses on energy transactions, mergers and acquisitions, and project development. 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 and 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 13 years of experience in the power industry and previously worked as a utility-scale wind power developer. She has been recognized by both Chambers USA and Legal 500, 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. In addition to her energy practice, Becky also represents clients in a range of mergers, acquisitions, dispositions, and strategic investments in the technology, health care, and real estate industries.

Experience Highlights

  • Tax equity investor in a series of investments in utility-scale solar projects in North Carolina
  • Private equity fund in its acquisition of tax equity positions in four portfolios of more than 8,000 aggregated rooftop solar projects
  • Duke Energy in connection with the development of a 36 MW battery storage facility located at the Notrees Wind Farm in Texas, the largest battery storage system of its kind, including the negotiation of new energy storage services agreements and a repowering project for the Notrees Energy Storage Project

Energy – Clean Enegy & Renewables

  • Investment bank in its sale of a utility-scale Texas solar development and the option to sell a second solar project
  • Tyr Energy, an Itochu Corporation, in its $500 million joint equity investment in the 845 MW Shepherds Flat wind power generation project in Eastern Oregon, at the time the largest wind farm in the world (assisted)
  • King Abdullah City for Atomic and Renewable Energy on establishing a legal and regulatory framework for a renewable and civil atomic energy sector in the Kingdom of Saudi Arabia (assisted)
  • Duke Energy Company in a 50/50 joint venture with Sumitomo Corporation for the development, construction, financing, operation, and maintenance of Duke Energy’s 131 MW Cimarron II Wind Energy Project and 168 MW Ironwood Wind Energy Project, both located in Kansas (assisted)
  • Public Utility Commission of Texas and ERCOT – assists in the representation of various renewable energy developers, including representation in Competitive Renewable Energy Zone proceedings and ERCOT protocol appeals, and negotiation of interconnection agents

Energy – Power

  • Riverstone Holdings in the $400 million acquisition of three coal-fired generating plants located in Maryland from a subsidiary of Exelon Corporation (assisted)
  • Power Purchase Agreement drafting and negotiations for a natural gas peaker plant in ERCOT and a fuel oil project in the Caribbean (assisted)

Mergers & Acquisitions

  • USA Compression Partners in its $187 million acquisition of compression assets from S&R Compression in exchange for common stock units representing 20% of the limited partnership interests in the company
  • Spredfast in its stock-for-stock acquisition of Mass Relevance, a technology leader in enabling social marketing experiences for brands and media companies (assisted)
  • Pharos Capital Group in its acquisition of Seaside Healthcare, a behavioral health services provider (assisted)
  • SailPoint Technologies in Thoma Bravo’s significant equity investment in the company, an identity and access management provider (assisted)


Contact Details


T +1.512.542.8737
F +1.512.236.3382
2801 Via Fortuna
Suite 100
Austin, TX 78746-7568
View LinkedIn profile
Download vCard

Download Biography

Related News

View More News

Becky's Practices

  • The University of Texas School of Law, J.D. with honors, 2009 (Editor in Chief, Texas Journal of Oil, Gas, & Energy Law; Magister, Phi Delta Phi; Wally Scott Endowed Presidential Scholarship; Tom C. Clark Fellows Scholarship; Phi Delta Phi Balfour Scholarship; Rocky Mountain Mineral Law Foundation Scholarship)
  • Carleton College, B.A., Computer Science, Political Economy (concentration), and Latin American Studies (concentration) magna cum laude, 2004 (Mortar Board National Honor Society, National Merit Scholar, varsity softball)
  • Admitted to practice: Texas, 2009
  • Chambers USA, Associate to Watch in Energy: State Regulatory & Litigation (Electricity) (Texas), 2011–2015
  • Selected to the Texas Rising Stars list, Super Lawyers (Thomson Reuters), 2015
  • Legal 500 U.S., Energy: Regulatory, 2013
  • Adjunct Professor: The University of Texas School of Law, Seminar on Electric Power Law, 2011 and 2013
  • Planning Committee: Renewable Energy Institute, The University of Texas School of Law CLE
  • Endowments Chair, Past-President, Founding Board Member, and Founding Fellow: Texas Energy Law Association 
  • Co-chair: Central Texas Chapter of Women of Wind Energy
  • Secretary and Board of Directors: Austin Public Library Friends Foundation
  • Member: Association of Women in Energy; Oil, Gas, and Energy Resources Law, and Public Utility Law sections, State Bar of Texas; Administrative Law section, Austin Bar Association