College is a significant time for undergraduates to declare majors and choose career paths. For many undergraduates, choosing both a major and a career path is challenging. Research shows that many universities deliver career interventions through dedicated career decision-making courses (Mead & Korschgen, 1994). However, there has been limited research on the behavioral and adaptive components of career exploration and planning specific to career-related interventions. As a result, this study was designed to address this gap by investigating the effectiveness of a major/career planning course that focused on the behavioral and adaptive components through occupational engagement, career adaptability, and student career construction. The study's findings suggest the need to structure major/career planning courses that promote the development and implementation of behaviors that increase students' engagement, occupational exploration, career decision-making, and skilling/instrumentation (e.g., making plans for the future, finding a job post-graduation). By doing so, professionals in higher education can help students to excel academically and increase overall retention rates.