Clemens is currently delivering Low Carbon Fuels policy for the UK transport sector, supporting the operations of the Renewable Transport Fuel Obligation (RTFO) scheme and Sustainable Aviation Fuel (SAF) mandate. He is primarily responsible for assessing the life-cycle emissions of renewable fuels and the feedstocks from which the fuel is made from. Dedicated to sustainability in his career, he previously led a global ports operator on the development of its first sustainability strategy and emissions reduction programme. Outside of his career, Clemens also engages actively in sustainability, creating a take-away box sharing campaign at his alma mater to reduce waste, and mentoring future sustainability talents to prepare them for transiting into the green workforce.