Trained as an energy systems engineer and policy analyst, Mijndert moved into the chemical engineering domain to work on climate change mitigation and reversion. Appointed Associate Professor at Heriot Watt university in 2019, he set up his research group in technology assessment of direct air capture and CO2 capture, utilisation, and storage technologies and systems. Mijndert's research focuses on i) developing the methods and tools for ex-ante appraisal of climate change mitigation technologies, making use of mathematical modelling, techno-economic analysis, and life cycle assessment, and ii) measurements and characterisation of materials to fill existing data gaps and support the modelling efforts. Mijndert is an Associate Editor for the journal Frontiers in Climate and regularly sits on the referee panel for the Frontier Climate CDR competition, to which he also provides consultancy. He is the vice-chair of the EU funded pan-European Transmit network, that aims to align CCUS and CDR research, build capacity, and reduce disparity in research intensity across European countries.