Leslie Henry Ayau has extensive experience in Electric Regulation, financial integration of electric power generation projects, development of renewable energy projects and carbon credit-generating projects, regulation of the Wholesale Electricity Market, and the Central American Regional Electricity Market. She has worked in the field of electric power for over ten years, starting with the translation of the General Electricity Law and its Regulations and the Wholesale Market Regulations into English. She was also part of the legal department of the National Electric Energy Commission for several years, carrying out activities in both the regulated and wholesale markets, including administrative and judicial matters, even in constitutional matters.

Additionally, she has advised various entities interested in the development of renewable energy generation projects, covering technical, regulatory, financial, and energy efficiency aspects. She has also participated in the negotiation of construction contracts, PPAs, and participation agreements. As a consultant, she has provided services to national and foreign entities on electric regulation, generation and electrification in rural areas, carbon credit generation and utilization, and wholesale market transactions. Furthermore, she has acted as an advisor in several thesis projects related to electric power issues in Guatemala.