Dr Channa Jayasena is a Reader and Consultant in Reproductive Endocrinology at Imperial College, St. Mary's and Hammersmith Hospitals, London. He is also Head of Andrology at North-West London Pathology Services. Dr Jayasena qualified in medicine at Cambridge University, after which he undertook specialist training in Diabetes and endocrinology in London. He performed research at Imperial College as a Wellcome Trust Clinical Research Training Fellow and subsequently became an NIHR Clinical Lecturer.

In 2018, Dr. Jayasena was awarded an NIHR Post-Doctoral Fellowship investigating the metabolic regulation of male infertility. He is Chief Investigator on an NIHR Health Technology Assessment (HTA) funded project to investigate the Efficacy and Safety of Testosterone Replacement in Men (TestES Consortium). Dr Jayasena is also the lead of the Society for Endocrinology (SfE) Specialist Endocrinology Network for Andrology. He also co-chaired the SfE UK Guidelines for the management of hypogonadism.