This quantitative, correlational study examined whether instructors' engagement style in online Council for the Accreditation of Counseling and Related Programs (CACREP) accredited clinical mental health counseling programs predict beginning counselors' self-efficacy. The study was conducted using both self-efficacy theory and social learning theory as a theoretical framework to deepen the understanding of the relationship between variables. The study's sample consisted of 144 master's counselors that completed an online CACREP-accredited master's level clinical mental health counseling program in the United States and had less than five years of counseling experience. Participants completed the Counseling Self-Estimate Inventory (COSE) to report on their feelings of self-efficacy as a beginning counselor and the Survey of Online Counseling Instructors Engagement (SOCIE) as a measure for their online counseling instructors' engagement style. Specifically, organizing and coordinating engagement style and active engaging style were the two dimensions of online counseling instructors' engagement that were examined. Linear regression analyses were used to analyze the data. Instructor's organizing and coordinating engagement style was found to be a statistically significant predictor of beginning counselors' self-efficacy. However, results did not indicate a relationship between instructor's active engaging style and beginning counselors' self-efficacy. The results of this study add to what is known about instructor engagement in online CACREP-accredited master's level clinical mental health counseling programs and can aid in improving the quality of counselor education programs, as well as beginning counselors' self-efficacy. Therefore, further research on this topic could increase awareness of educational factors that influence self-efficacy among professionals in the counseling field. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]