Haynes and Boone, L.L.P. offers experienced electric power litigators who guide clients through complex business, regulatory, and tort disputes across the energy sector. The team combines detailed knowledge of multiple power markets with strong courtroom capabilities, positioning the firm to handle high-stakes matters for generators, investors, lenders, transmission owners, utilities, and cooperatives. Its broad industry familiarity enables it to address disputes spanning both conventional and renewable energy assets. Co-head Leslie Thorne, based in New York and Austin, brings extensive expertise in power-related litigation and arbitration, regularly handling bet-the-company cases for major clients. Dallas-based co-head Ben Mesches is particularly noted for his appellate strength in the electric power sector, adding depth to the firm’s contentious offering.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘They are the most client-focused attorneys I've ever worked with. They've gone above and beyond the normal call of duty to represent our company. This ranges from case law to procedural nuances to an overall championing of our case.’
- ‘I feel that at Hayne and Boone, beyond the individual expertise of its lawyers, the level of teamwork among associates and partners alike is exceptionally high. Thanks to this quality, even in extremely challenging situations, every team member remains fully committed to advocating for the client’s success, undeterred by heavy workloads.’
- ‘Leslie Thorne is truly an outstanding practitioner and business advisor.’
- ‘I've been involved in several legal cases over the years, and Haynes Boone is hands down the best law firm I've worked with. They're responsive, they understand the law, they're ethical, and they care about their clients both personally and professionally.'
- ‘Leslie Thorne is very tough and reliable in dealing with the other side, while being extremely courteous and highly considerate toward clients. She is also skilled at team building and does an excellent job of uniting the team.'
- ‘Very knowledgeable on the substantive industry and regulatory issues, which increases their effectiveness as litigation counsel.’
Key clients
- Ovintiv USA Inc.
- XTO Energy
- Emissions Reduction Corp.
- RWE Clean Energy
- Seneca Companies, Inc.
Practice head
Leslie Thorne; Jason Mesches
Other key lawyers
Jason Jordan