Maria is a registered nurse living in Bedfordshire. She has held senior nursing posts in five London teaching hospitals specialising in intensive care nursing and infection control. She then undertook further training to become a public health consultant, working in inner city London communities with drug and alcohol abusers and prisoners. She also spent time working to improve services for those with a life-limiting diagnosis.
She led the NHS Prison Health team for London, before joining Great Ormond Street Hospital as director of partnership and public health. In 2008, Maria set up an independent consultancy company, which worked with the Ministry of Defence to address the health of serving personnel's children and families.