Henri Ingelman successfully defended his doctoral thesis “Systems-level characterisation and improvement of Clostridium autoethanogenum metabolism” on the 26th of September 2024. Henri did a great job at his presentation and also in the following discussion with opponent Prof. Diana Sousa from Wageningen University. The thesis was a great achievement after multiple setbacks from the COVID-19 pandemic made Henri to adapt and change plans. The thesis focused on improving understanding of acetogen metabolism and obtaining superior strains by combining gas fermentation with systems biology, adaptive laboratory evolution (ALE), and genetic engineering. Thesis supervisors were group leader Prof. Kaspar Valgepea and Dr. Lorena Azevedo de Lima. Congratulations!