Brattle experts assisted the Government of Western Australia’s Public Utilities Office (PUO) in designing market power mitigation measures for its newly reformed energy market. As part of our support, we established design objectives, interviewed stakeholders, assessed specific market characteristics affecting the design, synthesized lessons learned from the current Western Australia energy market and several international markets, and proposed an approach to best meet the design objectives. Brattle’s proposal included defining screens and mitigation measures for day-ahead and real-time energy and ancillary services markets.