The purpose of this study was to test STEM career interventions through a theoretically integrated STEM Career Education (SCE) Module. The effectiveness of SC education was tested on STEM Career (SC) interests, self-efficacy, and knowledge of students from two middle schools. The sample included middle school students from two private schools (N=33) in Islamabad, Pakistan. By using a mixed-method sequential explanatory research design, quantitative data were obtained before and after the intervention while qualitative focus group discussions were conducted post-intervention. A significant increase in SC interest, self-efficacy, and knowledge after participating in the SCs Program is reported, even after statistically controlling key variables. The training seems to be more effective for those with low SC knowledge. Findings indicate a need for robust interventions to target math self-efficacy. Results provide further directions for effective STEM interventions. By pinpointing limitations and future directions, this pilot study contributes to STEM education in Pakistan and provides a model of CE for other countries.