Dr Leanse was born and raised in Gibraltar, where he received his formative education prior to attending University. In 2017, he received his PhD in Molecular Microbiology from Imperial College London. Following his graduation, he was appointed as a research fellow at Harvard Medical School (HMS), working through the Wellman Center for Photomedicine at the Massachusetts General Hospital (MGH) in Boston, USA. In late 2021, in recognition of his accomplishments, he was promoted to the Harvard faculty. Alongside his University of Gibraltar appointment, he is currently appointed (part-time) as a researcher at the Massachusetts General Hospital in Boston, where he works to provide ongoing scientific consultation for the Dai Laboratory.