Hattie has extensive experience as chair of a number NHS organisations including Hertfordshire Partnership Foundation Trust (HPFT) and Buckinghamshire Health NHS Trust. She also sits on the steering group of the Disabled NHS Directors Network (DNDN).
Before joining the NHS, Hattie had a number of chief executive and senior management roles in the housing and homelessness sector and was awarded an OBE for services to homeless people in 2004. Hattie also chairs Eastlight Community Homes, a housing association based in Essex and works with a wide range of housing organisations on governance, strategy and resident involvement.