The study aimed to investigate various responsibilities which are implemented by school administrators in school environment for enhancing students’ discipline in Itilima secondary schools. The theory X and theory Y was used to guide the study. The study adopted convergent design that is under mixed method research approach. The sample size was 75 from 516 total population including heads of schools and teachers. The respondents were obtained through purposive sampling and total population sampling. The data collection tools were interview guides and questionnaires. Techniques for data analysis were thematic and descriptive statistics. The findings reveal that school administrators in school environment implement various responsibilities including; Invitation of guest speaker, time management, establishment of clear policies, consistence enforcement of rules, positive behaviour support program, professional development for staff, monitoring students’ behaviour as well as engagement with parents and community. The study concludes that the responsibilities which are implemented by school administrators are effective for shaping students’ discipline as a result of decreasing in number of students with negative behaviour decrease in school environment. The study recommends that teachers to be innovative in coming with new ways of shaping students’ discipline which do not affect student psychologically. Students should follow the guidelines which are communicated by teachers and other school administrators to them for enhancing their academic and social progress.