Usman, U. and Rokhmat, N. 2025. Development of a Web-Based Contractor Safety Management System (CSMS): A Case Study of PT. Petromine Energi Trading. Journal of Information Systems and Informatics. 7, 3 (Sep. 2025), 2646-2659. DOI:https://doi.org/10.51519/journalisi.v7i3.1230.