"I went straight into engineering from school and after 24 years was getting to the point where I felt I needed a change. It was getting a job as a technical instructor with an occupational therapy department that pointed me in a new direction."
Graham has been offered, and accepted, several challenging promotions since joining the service as a care assistant. He now manages more than 100 control room staff.
Sam's story is a great illustration of the opportunities to progress and work in different areas of the NHS.