Diana Liebmann is a Partner in the Energy and Power Practice Group of Haynes and Boone, LLP. She represents clients in regulatory matters before the Public Utility Commission of Texas, the Electric Reliability Council of Texas, the Southwest Power Pool and in various state commission proceedings. Diana represents clients in corporate and transactional matters including project development of both renewable and conventional generation, in drafting and negotiating power purchase agreements for both long-term and short-term sales including the sale of renewable energy credits and advising clients with regard to regulatory benefits and impediments to transactions. She also assists clients in litigation associated with conduct in the electric markets including litigation over power deals and litigation of market rules, protocols, and administrative investigations leading up to and including notices of violations.