Executive directors

Ian became Chief Executive in August 2019. He was appointed Medical Director in January 2011 and Chief Medical Officer in January 2017.

He joined the Trust as a consultant renal physician and honorary senior lecturer at King's College London in 1994. His clinical and academic career has included a broad range of senior management positions.

In addition to his clinical work, Ian has played a key role in the development of the Trust's life science partnerships, and has been responsible for many aspects of the Trust's digital transformation and innovation agenda.

Crystal was appointed as Chief People Officer in August 2024. She was previously Chief People Officer at Royal Free London NHS Foundation Trust, from 2021.

Before joining the NHS, Crystal spent 18 years in the UK Civil Service, joining the Home Office from university and progressing through HR and organisational development roles both there and in the Ministry of Justice.

She went on to hold senior roles at the Cabinet Office as HR Director, and Director of People at the Department for Work and Pensions – one of the Government's largest departments, employing 80,000 colleagues nationally.

Gubby was appointed as Chief Executive of our women’s and children’s services, which includes Evelina London Children’s Hospital, in May 2023. She is a consultant obstetrician and gynaecologist.

Before joining the Trust, Gubby was Medical Director of Hillingdon Hospitals NHS Foundation Trust. She also led the Women’s and Children’s Division at Chelsea and Westminster NHS Foundation Trust, including maternity services across their 2 hospitals and was special advisor to their Board on diversity and inclusion.

She is a graduate of Somerville College, Oxford and St Thomas’ Hospital Medical School.

Avey returned to the Trust as Chief Nurse in November 2020, having trained as a critical care nurse at St Thomas' at the beginning of her career.

Avey qualified in 1991 and her clinical experience includes theatre, general intensive care, coronary care and cardiothoracic nursing.

She became Chief Nurse and Director of Infection Prevention and Control at St George's University Hospitals NHS Foundation Trust in February 2017.

Avey has a postgraduate diploma in health services management and a masters in public administration. She is also Vice President of the Florence Nightingale Foundation and honorary Vice President of The Nightingale Fellowship.

She is our:

• Director of Patient Experience
• executive lead for adults' and children's safeguarding
• executive lead for infection, prevention and control

Damien was appointed as interim Chief Financial Officer in April 2025.

Damien joined Guy's and St Thomas' in 2022 as Operational Finance Director.

He is a chartered accountant who has worked in the NHS for over 20 years, initially joining Royal Berkshire NHS Ambulance Trust as a finance trainee. Damien has held senior finance roles in a number of NHS organisations, including spending 6 years at The Royal Brompton and Harefield NHS Foundation Trust prior to the merger with Guy's and St Thomas'. He also spent some time working in the commercial sector earlier in his career.

Sarah was appointed as the Chief Executive of our cancer and surgery services in 2021, having joined the Trust as Director of Operations in 2018.

She was previously Divisional Director of Cancer Services for The Royal Marsden and was responsible for the operational delivery of their NHS cancer and research services. 

Sarah has extensive management experience working in acute and specialist trusts including Divisional Director of Women’s and Children’s Services at King’s College Hospital. She started her career at Deloitte Consulting, before joining the NHS in 2003.

Louise was appointed as Chief Executive of our integrated and specialist medicine services in June 2024.  She was previously Managing Director of King George Hospital, part of Barking, Havering and Redbridge University Hospitals NHS Trust.

A pharmacist by background, Louise has held a wide variety of leadership roles including Programme Director for elective transformation and recovery at NHS London. She was Chief Pharmacist at Lewisham and Greenwich NHS Trust, where she was also Divisional Director of Operations for acute and emergency medicine and clinical support services.

Steven was appointed as interim Deputy Chief Executive in April 2025.

Steven was appointed as Chief Financial Officer in January 2022, having joined Guy's and St Thomas' in 2018 as the Director of Finance. He has extensive experience of NHS revenue and capital, major projects, change management, contracts, partnerships and commercial activities

He has worked in the NHS for over 20 years, initially joining the service on the national finance graduate scheme. Steven has worked for a number of NHS organisations in and around London, including Moorfields Eye Hospital NHS Foundation Trust where he was Chief Financial Officer and Deputy Chief Executive.

Jon was appointed Chief Operating Officer in January 2017.

Jon became the Chief Operating Officer and Deputy Chief Executive at Southend University Hospital NHS Foundation Trust in January 2014.

Before working at Southend, Jon was Director of Operations at Guy's and St Thomas'. He has many years' experience in director-level roles that span clinical operations, service modernisation, performance improvement, human resources and workforce planning.

Richard is Chief Executive of our adult heart, lung and critical care services which provide care from our Royal Brompton, St Thomas’, Harefield and Guy’s hospitals.

Richard was medical director of Royal Brompton and Harefield NHS Foundation Trust for 6 years before it became part of Guy’s and St Thomas’ in 2021. He has been a consultant cardiologist since 1999 and continues to run a weekly adult cardiac outpatient clinic.

He has a particular interest in the integration and transformation of clinical services for the future. 

Simon has been our Medical Director since 2016 and became Executive Medical Director in 2019. He originally joined the Trust as a consultant renal physician in 2005.

He became a clinical director in 2008 and was Chief Operating Officer from 2014 to 2016.

He has a PhD from Queen Mary University of London and an MBA from Westminster Business School.