- Professor of Reproductive Medicine & Surgery, Guy’s & St. Thomas’ (GSTT) Hospital and King’s College, London.
- Director of the Pre-implantation Genetic Diagnosis Programme
- Deputy Director of Subspecialty Training Programme in Reproductive Medicine.
- Member of The Advisory Committee on the Safety of Blood, Tissues and Organs (SaBTO) advises UK ministers and health departments on the most appropriate ways to ensure the safety of blood, cells, tissues and organs for transfusion/transplantation.
- Current member and former Chair of the HFEA Scientific and Clinical Advances Advisory Committee.
- Former Member of the Human Fertilisation & Embryology Authority Board.
- Former Executive board member of the British Fertility Society
- General Secretary of the International Society for IVF
- Former Chair of the RCOG National Clinical Studies group in Reproductive Medicine & Surgery.
- Honorary Member of the Middle East Fertility Society
- Visiting Professor at the University of Zagreb School of Medicine, Croatia.
- Principal Investigators of NIHR funded research grants.
- Published more than 185 Peer reviewed articles on different aspects of Reproductive Medicine (NEJM, Lancet, BMJ, Nature Cell Biology and Nature).
- Associate Editor of Frontiers in Endocrinology and former Associate Editor of RBM online Journal.
- Invited/plenary speaker on fertility and IVF in numerous international conferences.
- Expert Advisor to Singapore Ministry of Health on Regulation of Pre-implantation Genetic testing.