STEPS (Stepped Transition to Employment and Postsecondary Education Success) is an evidence-based program designed to help autistic young people feel better prepared for independent adulthood. The curriculum has evolved through several clinical trials, as well as input from community-based stakeholders. STEPS focuses on building up self-determination, self-regulation, and self-knowledge to help people develop the skills needed to reach their goals in education and employment. This manual provides a step-by-step guide to carry out the program and is designed to be easily picked up by the provider (e.g., therapist, educator) and used in individual or group settings, through personalized training and in-community "immersion" sessions. It can be used in conjunction with an accompanying workbook.