Christiaan joined Bellona in June 2026 as the Acting Head of Sustainable Markets. He has over 15 years of professional experience operating at the intersection of climate innovation, industrial decarbonisation, urban transformation, policy and regulation, and coalition building. He is the Founder and Executive Director of the City CDR Initiative, the world's first and only non-profit multi-stakeholder platform focused on realising urban carbon removal at scale. He is a Fellow at the Institute for Responsible Carbon Removal at American University and an Advisor to the Carbon Business Council. Christiaan previously held positions as Secretary General of the CCS+ Initiative and Head of Tech CDR initiatives at NextGen CDR Facility, while working at South Pole as a Senior Manager for Carbon Removal Platforms.