To improve relations and joint research with various universities, PUI-PT Combinatorica and Graph held a research internship program. Various universities that have delegated their students to participate in this program include Syarif Hidayatullah State Islamic University Jakarta, Zainul Hasan Islamic University Probolinggo, Jember University, Muhamadiyah University Jember, and PGRI Argopuro University Jember. The activities of this research internship program were attended by a total of 11 students and carried out for one week. Prof. Drs. Dafik, M.Sc., Ph.D. as Chair of the PUI-PT Combinatorica and Graph explained that the output produced by each of these students was a paper that could become the forerunner of their final project research. Furthermore, this program is also our PUI-PT downstream with the disciplines occupied by these students. In the future, it is possible that PUI-PT Combinatorica and Graph will cooperate with other universities in inviting their students to do research internships with us.