Johan Kestenare is currently the Engineering Director at CO2 AI, focusing on helping major corporations measure and reduce carbon emissions since June 2023. Previously, Johan served as an Engineering Manager and Lead Data Scientist at Tessian from October 2015 to August 2022, where responsibilities included building the Data Engineering Team and developing email security solutions to mitigate human error and data loss. Johan began their career with roles at Kambi Sports Solutions as a Part Time Trader, at NICTA as a Research Intern focusing on privacy leakages in mobile apps, and at Natixis as an intern monitoring country risk. Johan holds a Master of Science in Statistics from Imperial College London and has degrees in Mathematics and Finance from Université Paris Dauphine - PSL.