Our People

Sean became Group CEO in July 2021 having held a number of senior roles in the business since joining in October 2014. Initially as Chief Investment Officer, he helped transition the business from an owner of traditional meters to being a broader provider of energy infrastructure services to the retail market. Sean held the CFO position in February 2018 until he became Group CEO. He has over 25 years’ experience working in the infrastructure industry and has worked across multiple sectors both in the UK and overseas. Sean’s previous roles include Head of Investments at Costain plc, Senior Director at RBS Project and Infrastructure Finance, and Investment Director at John Laing.

Brandon joined Calisen in December 2022 as Chief Financial Officer. Prior to joining Calisen, Brandon served as CFO of Thames Water. Previously he was at SSE plc in a range of senior finance roles, including Managing Director for Finance (2013 – 2017). Most recently, he was CFO at Storegga, the international project developer focused primarily on carbon capture and storage. Brandon brings over 20 years’ experience working on critical national infrastructure projects from a variety of perspectives. He has also worked extensively on the public private interface, including a secondment to the Prime Minister’s Delivery Unit in the Cabinet Office.

Sarah Blackburn joined Calisen in April 2014 and was appointed as Chief Commercial Officer and General Counsel from 1 July 2021. Prior to that Sarah was part of the senior management team as General Counsel and Company Secretary. Sarah is responsible for leading the commercial, transactions and legal teams within the Group. She is a qualified lawyer with over 20 years of experience in a broad range of commercial transactions, infrastructure, M&A and finance.

Matthew joined Calisen at the beginning of October 2022 as Chief Operating Officer. Prior to this he worked for Centrica plc for 24 years leading various business units including as Managing Director, British Gas and his most recent role as MD, British Gas Services and Solutions. His responsibilities included the Smart Metering programme as well as being CEO of British Gas’ Insurance business.

Phillip McLelland joined Calisen in 2019 as Group Finance Director, and from December 2022 was appointed Chief Risk Officer with responsibility for developing the Risk Management Framework and Sustainability agenda at Calisen. Prior to Calisen, Phillip was Director of Finance at the British Business Bank, having previously been Finance Director at Provident Financial and, before that, with UK Asset Resolution. Phillip has over 25 years’ experience in senior Financial Management and Risk roles, and in addition to his financial services experience has also undertaken advisory roles with KPMG and PWC. Phillip is also a Non-Executive Director and Chair of the Board Risk Committee of the Furness Building Society.