This exploratory study investigated the occupational decision-related processes of senior high school students, in terms of the extent to which they may be amotivated in choosing a future occupation. Data were gathered using a newly developed questionnaire, which was largely adapted from a number of psychometrically proven instruments, and administered to 492 Grade 11 students attending a stratified random sample of six independent high schools in Sydney, Australia. Structural equation modelling was used to analyse the data. The major findings of the study include the development of a new empirically supported model that relates amotivation and vocational decision-related processes. The findings may be used by career advisors, psychologists, educators, and family members to advise and assist amotivated senior high school students to make occupational decisions.