Who's who
Interim Group Chair
David Roberts: Appointed October 2025
David is a healthcare executive with more than 35 years’ experience across government, public and private sectors in the UK and internationally. His previous roles include Chief Executive of University Hospitals Coventry & Warwickshire NHS Trust, Director General of Health and Human Services in Tasmania and board member of the King Faisal Specialist Hospital & Research Centre in Saudi Arabia. He was also Global Health Industry Leader with the professional services network EY and currently holds various non-executive and chair roles.
David has contributed to a range of international health reform initiatives and continues to advise organisations on governance, digital strategy and system improvement. He has held academic and advisory appointments in the UK, Australia and the Middle East and remains active in supporting leadership development and organisational change across global health systems.
Group Chief Executive
Professor Lesley Dwyer: Appointed May 2025
Professor Lesley Dwyer was the Chief Executive of the Norfolk and Norwich University Hospitals NHS Foundation Trust from March 2024 until she was appointed to the Group CEO role. With 30 years healthcare management experience, Prof Dwyer has been the CEO of Central Adelaide Local Health Network over the last five years, the biggest health authority in South Australia with more than 18,000 staff.
She was Chief Executive of Medway NHS Foundation Trust in Kent between 2015 and 2018, where she helped lift the organisation out of quality Special Measures and into a well led “Good” rating from the Care Quality Commission.
Group Executive Directors
Jo Segasby – Group Delivery Officer: Appointed May 2025
Jo Segasby has been appointed as the Group Delivery Officer and Deputy Group Chief Executive of the newly formed Norfolk and Waveney University Hospitals Group. The Group Delivery Officer will perform a key role in developing the structures for the new Group, managing performance and driving clinical transformation, as well as overseeing the two new hospital programmes at both the James Paget University Hospital and the Queen Elizabeth Hospital King’s Lynn. Jo will take up her position from 12 May 2025.
Rob Sherwin – Group Chief Medical Officer: Appointed December 2025
A Consultant Obstetrician and Gynaecologist, Rob was previously Medical Director for Specialised Commissioning and Health and Justice in NHS England, East of England for four years. His portfolio included strategic leadership across specialised services, equity-focused commissioning and regional medical governance.
He trained in medicine at Pembroke College, Cambridge, and the Charing Cross and Westminster Medical School in London. After initial clinical posts in London, he returned to the East of England to train in Obstetrics and Gynaecology at the Rosie Maternity Hospital, Cambridge, Hinchingbrooke and West Suffolk Hospitals.
Following his PhD and completion of his subspecialty training in Urogynaecology, he was appointed Consultant Obstetrician and Gynaecologist at the Whittington Hospital in North London. During his time there, he held several leadership roles including Clinical Director for Obstetrics and Gynaecology, Director of Research and Development and Associate Medical Director with responsibility for Appraisal and Revalidation. He also served as a Specialist Advisor to the Care Quality Commission, Secondary Care Representative on Bedfordshire CCG, and National Lead for Women’s Health for the Getting it Right First Time (GIRFT) programme.
Rob subsequently worked in Auckland, New Zealand, as Director of Women’s Health at Auckland District Health Board, where he led a large multi-disciplinary team and oversaw regional and national services including maternal-fetal medicine, gynaecological oncology and community midwifery.
Marcus Thorman – Chief Finance Officer: Appointed May 2025 
Marcus Thorman was appointed as Group Chief Financial Officer in March 2025. Having started in the NHS on the graduate scheme, Marcus has subsequently been a CFO in several trusts including a District General Hospital, a Specialist Trust, a Teaching Hospital and most recently within the group model at Manchester University NHS Foundation Trust.
Shane Gordon – Executive Managing Director of Norfolk and Norwich University Hospitals: Appointed December 2025
Dr Shane Gordon is Executive Managing Director of NNUH. He was previously Interim Executive MD at the James Paget for six months and, prior to that, was Director of Strategy, Research & Innovation at East Suffolk & North Essex NHS Foundation Trust (ESNEFT). He has 18 years of senior NHS management experience in transformational change, strategic and local commissioning and acute hospital leadership. He’s also Vice Chairman of the East of England Clinical Senate and a lapsed member of the Royal College of General Practitioners and a member of the Royal College of Surgeons.
Chris Bown – Interim Executive Managing Director for the Queen Elizabeth Hospital, King’s Lynn: Appointed June 2025
Chris Bown is the Interim Executive Managing Director for the Queen Elizabeth Hospital, King’s Lynn. He has held several Chief Executive roles across high-profile and complex healthcare organisations, including leading organisations through financial recovery, cultural change, and major system transformation. His recent positions include serving as Interim Chief Officer for Health and Community Services in Jersey, where he led work to address challenges in clinical governance and organisational culture. Chris has also held interim leadership roles at London North West University Healthcare NHS Trust and Barking, Havering and Redbridge University Hospitals NHS Trust, including during critical periods such as the COVID-19 pandemic.
Jon Barber - Acting Executive Managing Director of James Paget University Hospitals: 8 December 2025 to 12 January 2026
Jon was appointed Director of Strategy & Transformation at JPUH in February 2018 and has worked at the hospital since 2014, initially as a joint appointment with the Great Yarmouth and Waveney CCG. He served as our Deputy Chief Executive from March 2023 to May 2025.
Jon previously held senior management roles in both local and central government and holds an MBA in public sector management. He has also held a number of other non-executive positions.
Non-voting members of the Board
Ian Walker, Interim Group Director of Corporate Affairs
Ian is Interim Group Director of Corporate Affairs at NWUHG and has over 20 years' NHS executive leadership experience in roles covering corporate governance, risk management, communications and legal services. He was previously Director of Corporate Affairs at Cambridge University Hospitals NHS Foundation Trust and, prior to that, Director of Corporate Affairs and Trust Secretary at Barts Health NHS Trust in East London for 14 years. Before joining the NHS, Ian worked at HM Treasury where he undertook a wide range of roles, including on health policy and funding. Ian's role at NWUGH is to lead the development of the Group arrangements for corporate governance and risk management.
Ed Prosser-Snelling, Group Digital Director: appointed September 2025
Dr Prosser-Snelling is Group Digital Director and an Obstetrics and Gynaecology Consultant who continues to work as an endometriosis surgeon. He is focused on improving the quality and accessibility of patient care through direct clinical practice and advancing digital health initiatives.
He trained in the East of England, completing his specialist training in 2018. During this time, he joined the NHS England National Medical Director’s Clinical Fellowship programme at the Royal College of Obstetricians and Gynaecologists, giving him insights into health policy and governance. He also represented the East of England on the RCOG Council.
Ed joined the Norfolk and Norwich University Hospital in 2018 as a consultant and, shortly after, became Chief Clinical Information Officer and executive lead for digital health, joining the Trust Board as a non-voting member in 2022. He’s been instrumental in building the network of clinical and digital leads across Norfolk and Waveney hospitals that was essential in driving collaborative digital transformation. As an alumnus of the NHS Digital Academy, he’s led initiatives to improve IT infrastructure, cybersecurity and clinical systems, securing both board support and national approval for a digital strategy that includes a new Electronic Patient Record system.