The Children and Families Act (2014) extends statutory protections for young people with Special Educational Needs and Disabilities until age 25. Consequently the core curriculum for trainee educational psychologists (TEPs) needs to be developed beyond the current focus of work with early years and school-age children. In order to define requisite professional competencies for working with young people aged 16-25 with learning difficulties and disabilities and mental health needs, the Delphi Technique was employed to obtain consensus amongst an expert reference group. Two rounds of an online questionnaire and a face-to-face meeting with educational psychologists (EPs) reporting expertise in working with post 16 learners enabled the identification of areas to be added to or extended within existing training curricula. A competency framework for EPs working with young people aged 16-25 is proposed and implications for both TEPs and practitioner educational psychologists (EPs) explored.