St John Ambulance
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Our clinical team

St John Ambulance is regulated and monitored by the Care Quality Commission. Our clinical team, mostly qualified health care professionals, ensure that the first aid advice we give is accurate.

  • Medical Director - Dr Lynn Thomas, MStJ, BSc, MBBS, MA, FRCP

    Dr Lynn Thomas joined St John Ambulance as Medical Director in November 2018. Lynn leads a small team of employees and senior volunteers in the Medical and Clinical Directorate. She sits on the Clinical Committee with the Senior Clinical Volunteers and members of the Trustees Board on behalf of the Chief Operating Officer.

    Prior to joining St John, Lynn served for 27 years as a Medical Officer in the Royal Navy. She has served in both shore establishments in the UK and onboard Royal Navy ships across the world, including operational deployments. She was the first female Officer to be appointed to the rank of Surgeon Captain in the Royal Navy.

    Lynn maintains her clinical competency as a Consultant Physician at Queen Alexandra Hospital in Portsmouth.

    Lynn Thomas.
  • Head of Clinical Strategy and Policy - Lydia Scroggs

    ydia joined St John in October 2022. She qualified as a General Nurse in Staffordshire in 1988. On qualifying she went on to gain Operating theatre experience in The Radcliffe Infirmary, Oxford and St Thomas’ in London. She qualified as a Theatre & Anaesthetic nurse in 1992 at Guy’s Hospital and took up a Sister post at Guy’s Nuffield House, London. In 1993, she joined the Royal Air Force as a Nursing officer retiring 28 years later as a Wing Commander. During her service career, she completed tours in Iraq and Afghanistan, specialised in Aeromedical evacuation and took up positions in aeromedical training for the RAF, medical planning with NATO, policy development for Defence Nursing, Recruitment, Clinical Governance, personnel management and medical logistics. During the pandemic she returned to the NHS to support the vaccination programme. Her previous job was as the Polyclinic Manager in the Athletes Village for the Birmingham Commonwealth Games 2022 which involved volunteer recruitment, role and venue specific training, medical planning, logistics. During games time, she managed 85 volunteer healthcare professionals per shift covering 11 venues across Birmingham providing physical therapies, imaging, optometry, dentistry, GP services, immediate emergency care and first aid.

    She currently lives in Cheltenham and has a grown-up daughter, Abbi. A social butterfly, she likes to cook and entertain, loves all genres of music, enjoys musical theatre and has done Ceroc and amateur dramatics on and off over the years.

    Lydia Scroggs.
  • Clinical Partner - Jo Eversfield

    Jo, who joined St John Ambulance in August 2019, is the only non-clinical member of the team. Her role as Clinical Partner involves developing and implementing new projects for the Clinical team, working closely with other departments across the organisation.

    Jo previously worked in the Civil Service supporting the Defence Medical Services for many years, both in primary and secondary care. Having recently completed an Operational First Aider course, Jo is looking forward to volunteering for the organisation in her spare time.

    Jo Eversfield.
  • Clinical Partner - Sarah Dixon

    Sarah joined St John Ambulance in November 2019. Previously working within the Events team Sarah joined the Medical and Clinical team as a non-clinical team member whilst assisting the Mass Vaccination Programme. Her role as a Clinical Partner involves managing clinical inboxes, coordinating Occupational Health, and supporting new projects for the Clinical team.

    Whilst working as a Store Manager for Jaeger she began volunteering for Criminon UK as a distance learning tutor. She helped to deliver life skills courses to many UK prisoners which helps them to re-integrate into family life and maintain positive relationships for an effective rehabilitation. This volunteering work inspired Sarah to want to work within a charitable organisation, and so, she applied to work with SJA after nine years of working in retail.

  • Clinical Partner - Joanna Richards

    Joanna joined the Clinical team in November 2022 after spending three and a half years working in the My Training team predominately looking after the regulatory training compliance for Ambulance Crews and HCPs. Her role involves providing support to the Medicines team.

    Prior to joining St John Ambulance in March 2019, Joanna worked as a Professional Indemnity Insurance Underwriter in various companies in both London and Manchester. A keen sports player and runner, Joanna is currently a volunteer coach at her local cricket club, coaching and developing the new girls’ team as well as both her two sons' age groups.

  • Head of Medicines - Clare Greaves, MPharm PGDip MRPharmS

    I have now held this role for nearly four years and it has flown by! There have been many challenges and projects to get involved with; I’ve relished this and am looking forward to what is to come in 2024 and beyond!

    I have been a member of St John Ambulance for fourteen years in total, having had a variety of roles in three different regions. I first joined as a First Aider in Shrewsbury after attending a first aid at work course. I then moved to Brighton for 12 months, becoming an Advanced First Aider. Upon qualifying as a pharmacist, I relocated to North Region and have been a volunteer member there for ten years.

    I have previously held the role of Assistant to the Superintendent Pharmacist at a local small chain of community pharmacies, and now maintain clinical competence by working as a locum community pharmacist, outside of my time with St John Ambulance.

    Clare Greaves.
  • Head of Clinical Delivery - James McNulty - Ackroyd BSc (Hons), MCPara

    James has been a member of St John Ambulance since 1997, where he joined as a badger, completing the Grand Prior Award as a cadet and subsequently joined London’s Cycle Response Unit in 2009, where he remains an adult volunteer.

    He is a registered paramedic, previously working for the London Ambulance Service and most recently as a Resuscitation Practitioner in a clinical trials facility. James is also a military reservist with the Royal Air Force and is part of the Defence Medical Services instructor faculty for Battlefield Advanced Trauma Life Support, Military Pre-Hospital Emergency Care and Advanced Life Support.

    James McNulty.

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