Dr. Grayez is an experienced consultant in pulmonology and acute care medicine. Before joining Sidra Medicine, he worked as a consultant physician in internal medicine and pulmonology in Oxford, Birmingham, United Kingdom. He has extended his knowledge and expertise to include pleural, sleep, and difficult asthma, lung infections, lung cancer, and pulmonary embolism.

Dr. Grayez was an investigator in The Oxford Pleural Disease Trials Unit, Oxford.

Dr. Grayez has over 10 years of experience as a senior clinical advisor for the Parliamentary and Health Service Ombudsman in London. He advised on health complaints across the UK and provided recommendations to hospitals to improve the quality of health care.