The selection of a team leader is a crucial process that significantly impacts the success of a business and its overall structure, particularly in the context of an increasingly competitive environment. Selecting a team leader from a group of individuals within an organization who consistently deliver superior outcomes, exhibit collaborative behavior, demonstrate cooperation, and share a commitment to a shared objective poses a challenging predicament for the enterprise to achieve. This issue can be approached as a Multiple Criteria Decision Making (MCDM) problem. The process of selecting a suitable candidate for the role of team leader and subsequently determining the duration of their promotion within the organization can have significant ramifications. The present study employed the integrated trapezoidal interval type-2 (IT2) fuzzy DEMATEL-ANP-TOPSIS technique to address the issue of team leader selection. This problem entails the consideration of four primary criteria, along with twenty sub-criteria and twenty alternatives. The IT2 fuzzy DEMATEL-ANP approach was employed to derive the weight degrees of the sub-criteria. Subsequently, the IT2 fuzzy TOPSIS method was incorporated into the model to assign weights to the alternatives. The final phase of the study involved the utilization of sensitivity analysis to evaluate the robustness of the constructed model.