Previously, Jackson has worked in a range of senior roles, including head of HR for HQ British Forces, stationed in Gibraltar.
Jackson says: "I'm very excited about my new role with Yorkshire Ambulance Service and am looking forward to delivering our ambitious programme for transforming the HR function and the way that we empower and support our managers and staff."
Stephen Moir, deputy chief executive at Yorkshire Ambulance Service, says: "I am looking forward to working closely with Graeme to ensure we enhance our approach to the leadership, management and development of our staff."