Mark Hill

Energy, Utilities & Sustainability Lead, Defence Infrastructure Organisation

Affiliation: Utilities & Sustainability Lead at the Defence Infrastructure Organisation


A chartered environmental sustainability and energy professional with some 25 years of experience gained in the public and private sectors, Mark has since 2017 led the Energy, Utilities & Sustainability Team within the Defence Infrastructure Organisation*. Prior to this he headed the Environmental Liability Management Group where he oversaw work to support the decommissioning of infrastructure in Bosnia and Afghanistan and led on carbon and emissions reduction as the Assistant Head Strategic Initiatives within the Estate Strategy and Policy Directorate. More recently as part of the plans for a no deal BREXIT, Mark was seconded to the HMRC EU Exit Command Centre.

A member of the Cross Whitehall Energy and Sustainability working groups his focus is very much the Ministry of Defence’s (MOD) response to climate change and the government’s Net Zero Ambition. To this end he is actively engaged in developing the department’s energy and emissions strategy and road map working pan defence and with partners such as the Cabinet Office’s Energy System’s Catapult. Until relatively recently Mark also contributed to the European Commission’s Sustainable Energy in the Defence and Security Sectors (SEDDS) consultation forum, sponsored by the Director General Energy and facilitated by the European Defence Agency (EDA). Through his involvement he helped shape a common approach to energy efficiency and decarbonisation. In its third year the forum will focus increasingly on demonstrator projects such as smart micro grids.

Prior to joining the MOD, Mark worked for several environmental consultancies having started his career in the Sultanate of Oman with the Ministry of Water Resources before eventually being seconded to MOD.

Passionate about the environment and improving peoples’ lives, Mark is committed to making a difference and driving the changes necessary to achieve Net Zero emissions by 2050.

*With over 5000 staff DIO brings together property and infrastructure functions within the UK MoD. It is responsible for an annual spend of £3.3 billion, infrastructure and assets worth £21 billion, 4000 sites, a 230,000ha UK estate and an overseas estate that stretches from Canada to Singapore. DIO is responsible for ensuring sustainable, safe and legally compliant infrastructure and delivering the transition to a Net Zero Carbon estate by 2050.