 Brennan is a graduate of London University, Wye College (BSc in Applied Plant Science) and King's College London (Ph.D. in Food Science and Nutrition).During his career, he has also worked at Durham University (UK), Plymouth University (UK), Massey University (NZ) and Manchester Metropolitan University (UK).He currently serves as Editor in chief for the journal "International Journal of Molecular Sciences", and "International Journal of Food Science & Technology" and in the Editorial Board of the "Journal of Bioactive Carbohydrates and Dietary Fibre".