This document is intended to describe a framework of competencies that relate to the assistive technology specialist role within a specialised Augmentative Communication Aids (AAC) and specialised Environmental control (EC) service. This role is ‘cross-profession’ – i.e. can apply to either an Speech and Language or Occupational Therapist or Clinical Scientist. This documentation is published under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. and feedback and revisions are welcome. This work was presented at the T4I-2017 UK Assistive Technology Conference.