Dr Fasham is an Academic Consultant Clinical Geneticist specialising in rare genetic conditions and their impact on patients and families. He studied medicine at the University of Bristol (MBChB 2009), then trained in paediatrics and genetics, qualifying as a consultant in 2024.

During his academic training at the University of Exeter, funded by a Wellcome GW4-CAT fellowship, he completed a PhD in 2022. His research identified new neurodevelopmental conditions and corrected false genetic associations. Clinically, he provides holistic care for adults and children with rare disorders. His work uses large genomic datasets (e.g. Genomics England, UK Biobank) to advance understanding. He collaborates with leading researchers, including Professors Caroline Wright and Emma Baple, and uses platforms like GeneMatcher. He represents UK clinical academics via Decipher (Sanger Institute) and the European Society of Human Genetics. He is also involved in the Generation Study, a pilot of newborn genome sequencing.