Both hard skills and soft skills are important for employees to be able to compete and survive in their work. While hard skills can be achieved by further training, efforts to improve soft skills need to be more facilitated. Soft skills are important for increasing one's belief in one's capacity, and as a consequence, it affects the adjustment, performance, satisfaction, and stronger engagement in the workplace. This study aims to examine the effectiveness of an Integrating Employability Framework (IEF) toward occupational self-efficacy among trainees of vocational training institutions. This study used a one-group pretest-posttest quasi-experimental design. Measurements were conducted using the Instrument for Perception of Individual Capacity (Nurtjahjanti, Desiningrum, & Rahmandani, in press). Forty-one participants were recruited using the cluster sampling method from Balai Besar Pengembangan Latihan Kerja (BBPLK), Semarang, Indonesia. The analysis uses the statistical method of paired-sample t-test between pretest and posttest, showing a significant increase (t = 3.717, p = 0.001), which indicated the improvement of occupational self-efficacy. These results are evidence that IEF effectively increases occupational self-efficacy. Self-understanding, the appreciation of positive assets, and regular practice and evaluation of problem-solving techniques taught might play important roles in enhancing perceived control and core self-evaluation as well. This then correlates to self-efficacy in judging and making decisions when facing difficult situations. Active and effective coping could be selected as a strategy. Group roles provide therapeutic effects. Subsequent research should consider an effective and efficient design for larger groups, employ a research design providing a higher level of significance, and consider follow up measurement.