This study reviewed trainers' actions in the design and delivery of S-OJT and the preparation of S-OJT trainers. Trainers' behaviors and their preparation of S-OJT trainers tend to create the leaning and developmental opportunity for the trainer through social interactions between the trainer and the trainee/stakeholders. This study discussed possible unanticipated consequences on S-OJT trainers that can be resulted from their behaviors beyond explicit expectations of S-OJT on the trainee. To understand this flow, this study proposed a conceptual framework to depict the relationships between four constructs. (Contains 1 figure.) [For complete proceedings, see ED491481.]