Purpose: We applied Barnes's self-efficacy enhancement approach (e.g., mastery experiences, vicarious learning, verbal persuasion, and perceptions of psychological states) to two separate evaluation studies focused on teaching career counseling to master's level rehabilitation counselors-in-training and doctoral level counselor educators-in-training. Methods: Study 1 employed a pre/post, single group design with 24 master's level rehabilitation counselors-in-training. Study 2 employed a longitudinal, single group design with 13 counselor education doctoral students. Students in each study participated in a 14-week semester-length career counseling course designed using Barnes's self-efficacy enhancement approach. In both studies, students participated in a mini-practicum, completed several measures of self-efficacy and perceived competence during multiple time points across the semester. Results: Findings from Study 1 indicated an increase in career counseling self-efficacy and helping skills self-efficacy. Findings from Study 2 indicated an increase in career counseling self-efficacy and perceived counseling skills when working with people with disabilities. Conclusion: Findings from Study 1 and Study 2 support Barnes's self-efficacy enhancement approach when teaching career counseling to rehabilitation counselors-in-training and doctoral students in counselor education.