Mark serves as Executive Director of the Voluntary Carbon Markets Integrity Initiative (VCMI), an independent organisation whose mission is to enable high integrity carbon markets.

With a background in development and environmental economics, Mark has worked across various areas of environment and climate policy for over two decades, with a particular focus on the use of economic instruments in the pursuit of sustainable development.

His previous roles include: Managing Director at Climate Advisers, a Washington DC-based environmental consultancy; Chief Executive of Mongoose Energy Ltd, then the UK’s largest developer and manager of community energy projects; and Chief Executive at The Climate Group. He was co-founder of both the Verified Carbon Standard and the Gold Standard.

He serves as a member of the Governing Board of the Integrity Council for the Voluntary Carbon Market and is also currently a board member of Verra, Chair of Brighton and Hove Energy Services Coop and a member of the International Advisory Panel on Biodiversity Markets and the Time CO2 Advisory Council.