John is CEO of Health Care Informed (HCI), provider of patient safety, external evaluation, and quality improvement intelligence and support services. From its Irish base HCI works with external evaluators such as the National Accreditation Organization of Brazil (ONA), the Supreme Council of Health, Qatar, the Australian Council on Healthcare Standards, and the Irish Medical Council. In addition, HCI provides direct support services to hospitals, and related care services, in the UK and Ireland.

Prior to establishing HCI, John held the position of Director of Research and Development with the Irish Health Services Accreditation Board (IHSAB), the national external evaluation authority. Former roles included being the Director of the Irish Society for Quality and Safety in Healthcare (ISQSH), where he instigated, among other things, the inaugural National Patient Perception of Care Survey and the first ISO 9000 certification for acute care in Ireland or the UK.

John is an honorary lecturer, in quality improvement and patient safety, of the Royal College of Surgeons in Ireland (RCSI), sat on the Advisory Committee of the European Forum for Quality in Healthcare, represented Ireland on the EU ExPeRT Project, and has acted as the Technical Advisor to the International Society for Quality in Healthcare (ISQua) on external evaluation. In 2013 he was elected to the Board of ISQua, and was later appointed to the ISQua International Expert Panel.