Gillian started his postdoc in 2026, after completing his PhD at the Department of Human Biology at Maastricht University. His PhD project focused on the validation of a non-invasive, real-time in-vivo microbial fermentation chamber. Previously, he obtained a BSc in Biomedical Sciences at Maastricht University and a MSc in Biomedical Sciences with a specialization in Nutrition, Physical activity and Metabolism at Maastricht University.