CEP Board members
Jason Bretherton
Chair
Jason is an Electrical Engineer with a Post Graduate Diploma in Management. He has worked as an engineering consultant in the building services industry in New Zealand and overseas for more than 25 years. In his current role as a Technical Director at WSP based in Christchurch, Jason provides technical leadership, high level concept design advice and undertakes critical review across a diverse range of projects. He has a passion for energy efficiency and sustainability and strives to deliver a high degree of integration by applying a whole-of-life approach. Jason joined the Board in September 2021 and appointed Vice Chair in July 2023. In March 2025 Jason became Chair.
Eugene Robson
Vice Chair
Eugene is a Senior Engineer at DETA Consulting, providing tailored energy and carbon reduction advice to a wide range of industrial and commercial clients across New Zealand, Australia and the Pacific Islands. He has worked in the industry since 2011, is a Chartered Professional Engineer and holds a BE(Hons) in Mechanical Engineering. Eugene is based in Tauranga and joined the CEP Board in July 2023.
Yvonne Gilmore
Treasurer
Yvonne has worked in utilities management both internationally and locally for more years than she likes to admit. She believes strongly in sustainability and leaving a smaller footprint on the planet. Yvonne is an independent consultant based in Christchurch. She joined the Board in May 2017, and was appointed Chair from June 2018 until June 2021.
Don MacKenzie
Don is the Sustainability and Business Operations Manager at CarbonEES. He is based in Wellington and has worked with central and local government authorities, banks, and research institutes on producing GHG inventories and decarbonisation strategies. He has a strong passion for measuring and reducing emissions, measuring his own emissions since January 2024. Don joined the CEP board in December 2023.
Jonathan Linders
Jonathan is the Energy Manager for Wellington City Council. He joined the CEP Board in December 2024.