Executive Directors
Our Executive Directors are responsible for the operational management of the Trust.
Matthew Trainer, Chief Executive
Matthew became Chief Executive of the Trust on 6 July 2026. He joined the Trust from Barking, Havering and Redbridge University Hospitals NHS Trust, where he had been Chief Executive since 2021.
Prior to this, Matthew was Chief Executive of Oxleas NHS Foundation Trust for three years. He joined the team at Oxleas from King’s, having been Managing Director of the Princess Royal University Hospital (PRUH).
Matthew has also held senior positions at NHS England, the Care Quality Commission and the MS Society.
Tracey Carter MBE, Chief Nurse and Executive Director of Midwifery
Tracey Carter joined the Trust in June 2023. Prior to this she worked at West Hertfordshire Teaching Hospitals NHS Trust, where she has been Chief Nurse and Director of Infection Prevention and Control since 2014.
Tracey has over 30 years’ experience as a nurse, and has held several other senior nursing positions, including Deputy Chief Nurse at Barts Health. In May 2019, Tracey received a prestigious Chief Nursing Officer award, and in 2020 she was appointed a Member of the Order of the British Empire (MBE) for her nursing leadership and services to the NHS.
Roy Clarke, Chief Financial Officer
Roy joined the Trust in March 2024 on secondment from Norfolk and Norwich University Hospitals NHS Foundation Trust, where he was Chief Financial Officer. He was made substantive in the role at King’s in November 2024.
Before joining the team at Norfolk and Norwich in 2020, Roy held a number of Board positions within the NHS, including as Chief Financial Officer at Royal Papworth Hospital NHS Foundation Trust.
Roy is a Chartered Management Accountant, and is also a Trustee at the Royal College of Obstetricians and Gynaecologists. He has also worked as an Executive Reviewer for the Care Quality Commission.
Damian McGuinness, Chief People Officer
Damian took up the Chief People Officer role at King’s in September 2025. He joined the Trust from the London Ambulance Service (LAS), where he led the organisation’s People and Culture Directorate from 2021.
Before joining LAS, Damian worked at Barts Heath NHS Trust, where he served as Director of People at The Royal London and Mile End Hospitals.
Damian has significant experience of the NHS in London, having worked in HR and organisational development roles within acute, mental health and commissioning trusts for more than two decades.
His role at King’s also includes leading the Trust’s efforts to make King’s a more equitable, diverse and inclusive organisation for staff, and the many people who use our services.
Dena Marshall, Chief Operating Officer
Dena joined the Trust as Chief Operating Officer on an interim basis in November 2026. Dena has extensive NHS managerial experience, most recently as Chief Operating Officer at Great Ormond Street Hospital.
She has also held senior managerial roles at Surrey and Sussex Healthcare NHS Trust, Barts Health NHS Trust, and Manchester University NHS Foundation Trust.
Dr Mamta Shetty Vaidya, Chief Medical Officer
Dr Mamta Shetty Vaidya joined the Trust in January 2025.
Before joining King’s, Mamta was Chief Medical Officer and a Consultant Paediatric Intensivist at Barking, Havering and Redbridge University Hospitals NHS Trust. Prior to this she was Deputy Medical Director at The Royal London Hospital, part of Barts Health NHS Trust, where she worked for more than 15 years.