Department profile
Haynes and Boone, LLP

Energy: State Regulatory & Litigation (Electricity)

USA Guide 2026 : Texas


Haynes and Boone, LLP

Rankings

About

Provided by Haynes and Boone, LLP

Haynes Boone’s prowess in the electric power sector comes from decades of experience advising clients around the world. Our firm is on the cutting edge of trends affecting the energy industry, from traditional fossil-fired power generation (coal, gas & nuclear) to renewable power (wind, solar, geothermal, hydroelectric & biomass).

Our lawyers have experience in every aspect of power generation, transmission, and wholesale & retail sales. We represent clients globally by advising and assisting with regulatory approvals, compliance, development & financing of power projects, purchases & sales of power, M&A, tax advice, ESG-related metrics and renewable energy credits.

We have broad experience with regulation involving the Electric Reliability Council of Texas, the Public Utility Commission of Texas, MISO, PJM, CAISO, Southwest Power Pool and Western Electricity Coordinating Council. We represent clients before the Federal Energy Regulatory Commission, and the Regional Transmission Organizations & Independent System Operators. Our lawyers understand the regulatory risks and opportunities that form the framework for commercial power markets & that impact transmission siting, rate recovery, service by load-serving entities, and risks to end users.

Our clients include power generators, power marketers, electric cooperatives, municipalities, financial institutions, project developers, transmission & distribution utilities, retail providers, and large industrial & commercial customers.

Chambers Review

Provided by Chambers

Energy: State Regulatory & Litigation (Electricity) - Texas

Band 3

Band 3


What the Team is Known For
Haynes and Boone, LLP has an expert team of lawyers offering an in-depth service to clients across regulatory and litigation matters in the electricity sector, including issues arising from transactions. Maintains a high profile for its industry advocacy before regulatory bodies, with recent engagements including ERCOT and PUCT proceedings. The firm is known for its representation of rural cooperative utilities and renewable generation owners.

Work Highlights

Provided by Chambers

  • Haynes and Boone, LLP continued to represent South Texas Electric Cooperative in multiple rulemaking and policy matters before the PUCT concerning generation and transmission infrastructure in the ERCOT region.

Notable Practitioners

Provided by Chambers

  • Band 2Diana Liebmann
    Band 2Diana Liebmann

    Diana Liebmann

    Diana Liebmann is the power and renewables group leader. She is respected for her expertise in power market structuring and particular knowledge of ERCOT rulemaking.
  • Up and ComingCarlos Carrasco
    Up and ComingCarlos Carrasco

    Carlos Carrasco

    Carlos Carrasco often acts for electric cooperatives and renewable energy asset owners in regulatory and compliance filings at the PUCT and ERCOT.
  • Up and ComingJennifer Littlefield
    Up and ComingJennifer Littlefield

    Jennifer Littlefield

    Jennifer Littlefield is an up-and-coming attorney who operates a broad energy regulatory practice in which she appears in rate cases, permitting matters and a variety of compliance filings at the PUCT and ERCOT.

Ranked Individuals at Haynes and Boone, LLP (3)

Texas

Members

Provided by Haynes and Boone, LLP

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