Previously, he was the Director-General for Energy Markets and Infrastructure at the UK Department of Energy and Climate Change between 2009-15. In that role, he had responsibility for advice to the Government on:
- oil and gas,
- renewables (including solar),
- Carbon Capture and Storage (CCS),
- retail markets,
- decentralised energy
- energy security issues.
He led the work on the Electricity Market Reform (EMR) Programme under the Coalition Government (2010-15) and was the Government expert witness to the CMA inquiry at the end of 2014.
Simon was awarded a Companion of the Bath (CB) in the 2014 Queen’s Birthday Honours list for his work on UK energy supply and energy security issues. He is also a Fellow of the Energy Institute (FEI), on the Executive Council of the Parliamentary Group on Energy Studies (PGES), and on the Board of the University of Sheffield Energy 2050 Programme.