Abstract: The working relationship between contractor and subcontractor as their vendor is carried out with mutual benefit or is called a win-win solution (Winarta et al., 2022). Selection of the vendor shall always be considered by project manager because the vendor can have very positive or very harmful and negative impacts on the general performance of an organization. Identifying important criteria on the assessment system model using Contractor Quality Safety Management System (CQSMS) Evaluation, can minimize unsatisfactory quality and safety performance of the vendor. This study was conducted to identify assessment criteria and its rating on the assessment system model using Contractor Quality Safety Management System (CQSMS) Evaluation that affect quality and safety performance of the vendor.