Our Executive Leadership Team

Our day-to-day operations are overseen by our executive leadership team. They are responsible to the boards of Trustees of the charity, St John Ambulance, and its parent charity, the Priory of England and the Islands of the Order of St John. 

Chief Executive - Martin Houghton-Brown

Martin Houghton-BrownMartin joined St John Ambulance as Chief Executive in January 2018. He has a strong track record in leading the development of public service delivery and in policy change with a focus on giving people – especially young people – the chance to fulfil their potential through volunteering, education and training. He comes to St John Ambulance from Depaul UK, where he was chief executive for five years. While at the charity Missing People, he successfully campaigned for a new missing persons law and launched the new national telephone number for missing people. He has also held roles at the Children’s Society and served as Chair of the  YMCA England & Wales board of trustees.

In June 2019, Martin was appointed as Chair of the Centre For Youth Impact which reflects his long-term commitment and dedication to making a positive impact on the lives of young adults and children.  

Chief Operating Officer - Richard Lee

Director of Fundraising - Rebecca Mauger

Director of Governance - Tommy Hyun

Director of People and Organisation - Steve Foster

Director of Priory and International Affairs - Sarah Duthie

Director of Strategy and Communications - James Radford

Director of Finance and Resources – Yvonne Smithers

Chief Commissioner - Ann Cable

Chief Business Officer - George Woods

Our trustees

Our trustees ensure the smooth running of both charities. The Prior, the Dean, the Chief Commissioner, and the Chancellor are ex officio members of both governing bodies.

St John Ambulance Board of Trustees

Surgeon Rear Admiral Lionel Jarvis CBE KStJ DL (Chair)

Dr Lionel Jarvis joined the Royal Navy after training as a doctor. As a consultant clinical radiologist, he won many professional awards. From 1999-2003, he was Commanding Officer of Royal Hospital Haslar. He was deployed on operational activity in a number of conflict areas, receiving operational medals from the UK Government, the Kingdom of Saudi Arabia, and the State of Kuwait.

In 2006, he was appointed Honorary Surgeon to Her Majesty The Queen, which he held until 2012. As an Admiral, he was Medical Director General of the Royal Navy and Assistant Chief of the Defence Staff for Health. Before joining St John, he was Chief Executive of the Qatar Heart Hospital.

Dr Jarvis was admitted as Officer Brother of the Order of St John in 2012 and promoted to Knight of the Order in May 2016. From June 2016, he was appointed Prior of England and the Islands of the Most Venerable Order of St John of Jerusalem, and Chair of St. John Ambulance.


Mr Michael Messinger LVO KStJ QPM DL

Mr Messinger had a 40-year career as an officer in the Metropolitan Police Service. For the latter part of his time in the Met he was responsible for public event policing, emergency planning, and consequence management policy and delivery across London. As Director of the Metropolitan Police Friendly Society, Mr Messinger has been the Commander of St. John Ambulance London since 2007.

He was appointed Chancellor in February 2017, having previously been Chief Volunteer for St. John Ambulance from 2012 – January 2017. He has been a Trustee since June 2010.


The Very Reverend Dr John R Hall KCVO CStJ

Dr Hall was the 38th Dean of Westminster from 2006 until November 2019. As Dean, he led the ministry and mission of Westminster Abbey. He chaired the governors of Westminster School and of Harris Westminster Sixth Form.

After a gap year in Kenya and university in Durham, he taught for two years in Hull before training for the priesthood. He was ordained in 1975 and worked in parishes in South London, later serving as diocesan director of education in Lancashire. Then for eight years he served as the Church of England's chief education officer, overseeing, amongst other responsibilities, almost 5,000 Church of England schools and eleven Anglican universities.

Dr Hall is a Fellow of the Society of Antiquaries and of the Chartered Institute of Secretaries. He has honorary doctorates from four universities and was for eight years a Pro Chancellor of the University of Roehampton. In October 2019, The Queen appointed him a Knight Commander of the Royal Victorian Order.

Dr Hall chairs the Council of the Royal School of Church Music and is a trustee of two groups of academies and independent schools, the Woodard Corporation and United Learning. He lives in Chichester, where he is a Prebendary (honorary canon) of the Cathedral. He is Dean Emeritus of Westminster.


Mrs Ann Cable MBE DStJ DL

Appointed a Trustee in 2017, Mrs Cable began her St John life as a Cadet and has been involved with the organisation ever since. Having run several successful Cadet Units, she went on to hold senior operational positions and was appointed the first female Commissioner for London St John Ambulance in 2008. She led the St John Ambulance volunteer resourcing for all major events in the capital during the period 2008 - 2013. This included Her Majesty The Queen’s Diamond Jubilee and the Olympics and Paralympic Games. Mrs Cable went on to become National Volunteering Adviser and, in 2017, she was appointed Chief Volunteer. In June 2019, she became St John Ambulance's Chief Commissioner, with responsibility for leading our 25,000 volunteers and providing strategic oversight in this area for the Charity.

Now retired from her professional life as a Headteacher and School Inspector, Mrs Cable also thoroughly enjoys her role as the Representative Deputy Lieutenant for the London Borough of Enfield.


Ms Margaret Coleman OStJ

Ms Coleman joined the St. John Ambulance Board as a Trustee in April 2015. She holds a number of non-executive roles including Chair of the Media Centre, a social enterprise in the creative and digital sector; Chair of Yorkshire Dance, a charity promoting excellence in dance; Chair of Certa, an awarding body; and until December 2013 was on the board of the National Council for Voluntary Organisations. She is a Fellow of the Royal Society of Arts and of the Chartered Management Institute.

Until 2010, she was Regional Director in Yorkshire and the Humber in the Learning and Skills Council (LSC). She had responsibility for education and training, including apprenticeships for adults and young people in schools, colleges, and workplaces across the region. She was also national Third Sector Champion.

Ms Coleman has worked in all the major sectors of post-16 education, including higher and further education, teacher education, adult skills, and sixth form colleges. Before joining the LSC in 2001, Ms Coleman was the Principal and Chief Executive of Huddersfield New College.


Mr Mohan Mansigani OBE OStJ

Mr Mansigani is a highly commercial and creative finance director with extensive private equity experience who has played a key leadership role in establishing Casual Dining Group (previously known as Tragus) as a major UK restaurant business. He also led the business through two private equity transactions including the £267m sale to Blackstone in 2007. Prior to this he was CFO at Costa Coffee and TGI Friday’s.

Mr Mansigani is a Fellow of the Institute of Chartered Accountants and serves as a trustee on the Migration Museum Project. Mr Mansigani joined the St. John Ambulance Board as a Trustee in July 2016.


Professor Sir Keith Porter

Professor Porter was educated at Marlborough College and St Thomas’s Hospital, London. He was appointed Consultant Trauma Surgeon at Birmingham Accident Hospital in 1986, a service that is now delivered at Queen Elizabeth Hospital Birmingham, where he is Professor of Clinical Traumatology, and until June 2018 was the Clinical Director of the Major Trauma Centre. He has been the clinical lead for injured soldiers returning to the UK for the last decade, including the Iraq and Afghanistan wars.

Professor Porter has been a leader in the development of the new medical subspecialty of Pre-Hospital Emergency Medicine. In recent years, he has been the Chairman of the Faculty of Pre-Hospital Care and also the Intercollegiate Board for Training in Emergency Medicine. He is Chair of the Trauma Care Council and co-editor of the journal 'Trauma'.

For his services to the military, Professor Porter was knighted in the 2010 Queen’s New Year’s Honours List.


Miss Mariam Ibrahim

Miss Mariam Ibrahim joined St. John Ambulance as a Cadet in December 2013. She was elected to the London Region Youth Board as the West London Representative in 2015 and won her District’s Cadet of the Year competition later that year. In January 2016, she was elected as Chair of the London Region Youth Board for two years, later expanding it to become the London and South Regional Youth Forum. The combination of these roles meant that she gained experience in representing young people at a district, regional and national level. She was an early member of the Cadet Programme Review team, represented St. John Ambulance in Parliament at All-Party Parliamentary Group meetings and worked with YMCA England & Wales on a mental health project.

Miss Ibrahim has also gained experience in championing youth voice outside of St. John Ambulance. She was a member of the NHS England Health Cadets Steering Group, part of her University’s JCR Executive Committee and is currently working with the NSPCC as part of a focus group reviewing youth volunteering opportunities.


Mr Bob Harayda

Mr Harayda has held a broad range of senior management positions in the hospitality and energy sectors, most recently as Senior Vice President of Finance at Marina Bay Sands in Singapore.  Over the course of his 35-year corporate career, Mr Harayda had assignments in the USA, UK, and Thailand as well as Singapore.

He is an Independent Director of the International Tennis Integrity Agency, the anti-corruption body covering professional tennis globally. He also serves as a member of the Finance and Audit Committee of a multinational education charity based in London.   

Mr Harayda has a BA in Economics from Claremont McKenna College in California and an MBA in Finance from Cornell University in New York. He joined the St John Ambulance Board in January 2021 and is a member of the Audit and Risk Committee.


Ms Ingrid Waterfield

Ms Ingrid Waterfield is an HR executive and is currently Chief People Strategy & Culture Officer for KPMG EMA (Europe, Middle East & Africa). Prior to this, she was the Executive HR Director responsible for implementing the people strategy and the change management programme for KPMG South Africa. In 2017 she spent a year working with KPMG’s Global Leadership on the most important strategic questions facing the global firm at that time.

Ms Waterfield originally trained as a Chartered Accountant and has over 20 years of experience both as an external HR adviser, and as part of KPMG’s HR leadership, on interventions to increase organisation performance and improve employee motivation and engagement. An important aspect of her work has been focussed on diversity and inclusion strategies and developing agile workforces to enable businesses to adapt to the fast-moving world around them.

Ms Waterfield is passionate about supporting young people to enable them to belong, contribute and thrive in their communities, in education and in the work place. She is Vice-Chair of YMCA Downslink Group, part of the International YMCA Federation across Surrey and Sussex that supports over 15,000 young people every year.

The Priory Council of Trustees

Find out more

Our clinical team

Our clinical team ensures the first aid advice we give is accurate, and maintains standards of clinical practice throughout the organisation.

Our sister organisations

Find out more about St John International, the St John Fellowship, and our sister organisations based across the UK.

Our history and heritage

St John Ambulance is a modern and dynamic charity, but we are privileged to have a long and diverse heritage underpinning our vital work.