The System Usability Scale (SUS) and the Unified Theory of Acceptance and Use of Technology (UTAUT-2) were adapted for a project in which individuals with level 2 autism, light or moderate brain injury, or light intellectual disability were asked to rate the usability and acceptability of a prototype for a computerized workstation training system. The objectives are (1) to detail the five steps of the co-design method and (2) to disseminate adapted versions of the SUS and UTAUT-2 for neuroatypical clients. The co-design method involved to: 1- establish a multidisciplinary advisory group, 2- develop initial drafts of the prototype, 3- conduct think-aloud usability evaluation, 4- test the prototype in clinical simulations and 5- generate a final prototype informed by workshops. The co-design method allowed us to rigorously and efficiently adapt these questionnaires and to validate them in context with the target population. The results from the adapted SUS (78.73 out of 100 = good) led to the pursuit of a computerized training system to facilitate the employability of the target population. The results from the adapted UTAUT-2 are presented for step 3. Steps 4 and 5 will be completed during work activities (assembly of parts) with the training system once manufactured.