Joop Hazenberg has been leading the European office of the CCSA since 2023. He has a long track record in EU energy and climate policies.  Amongst others, he was EU correspondent for a range of international media, campaign manager for European NGOs on the phase-out of coal power plants, and Director External Affairs at the GSMA, representing the mobile telecommunications industry in Europe. He also worked for the European Heat Pump Association and represented SolarPower Europe and WindEurope on the topic of corporate renewable energy sourcing.

Before moving to Brussels in 2013, Joop worked in political circles in his home country The Netherlands. He held several functions in the Dutch Parliament, the Ministry of Foreign Affairs and a national newspaper. He also founded a think-tank for young professionals and wrote six books and many op-eds and essays. His latest book deals with climate action.