Reserve Officer Training Unit (ROTU) is a unit, training volunteer student which undergoes studies at undergraduate level to become a reserve officer. They will be commissioned as second lieutenants after completing the training. Thus, student committee known as Jawatankuasa Kolej Mahasiswa (JKM) is an association under residential college had been set up to conduct co-curricular activities outside the classroom for students. Besides, they are also intermediaries between students and campus management besides helping to manage students' welfare. More than half of JKM at Kolej Tun Dr. Ismail (KTDI) consisted with ROTU student. Active involvement outside the classroom has shown that apart of playing a critical role on student's soft skills, it also contributes huge impact toward academic performance. This study is conducted to determine the significance of ROTU student in JKM KTDI. The study conducted using questionnaire which involved 182 respondents of ROTU members, consisting of young officers and cadet. The set of questionnaire forms covered the respondents' backgrounds and questions regarding the importance of ROTU in the JKM association also included. The result produced the advantages for ROTU in JKM KTDI but there is several importance should be improved by both parties.