Objectives This study aims to investigate post-management service experiences for graduates among teachers in a post-secondary program for vocational education in an auto-ethnographic inquiry, thus examining their post-management service experiences from multiple angles and searching for plans to vitalize their post-management service. Methods For these purposes, the study made an auto-ethnographic approach. Auto-ethnography is a methodology for researchers to look at their experiences in a first-person narrator and observer to understand their social and cultural contexts. I collected personal internal data, interview data, participation observation data, and local data in order to explore the post-management service. The data were interpreted through the process of the comprehensively analytical procedure based on the practical eclecticism. This study tried to reflect on meaning of the post-management service from the perspectives of a teacher as an insider. Results First, the subjects reflected on problems with their post-management service provided only in documents and had a self-examination into the need for post-management service for graduates; secondly, they felt their limitations with the improvement of the post-management service system, but they managed to establish a post-management service environment that was realistically feasible and search for ways to make a cooperative approach with concerned agencies; and finally, they took into consideration what kind of talents that corporations wanted and practiced individualized post-management service reflecting students' individual needs. Conclusions The investigator felt a need to continue post-management service for the successful job retention of graduates as a teacher in a post-secondary program for vocational education. There should be efforts to prepare guidelines at the level of municipal and provincial education offices, have regular discussions about post-management service in a consultative group of concerned agencies, and expand the scope of post-management service throughout life so that post-management service can be vitalized.