Supervision aims to protect clients and continue the development of supervisees. After graduation from formal counseling programs, supervision becomes the primary teaching, learning, and evaluative setting. Supervisors are tasked with monitoring and advancing their supervisees' skills and abilities, including multicultural competence and cultural humility. Clinical mental health counselors serve an increasingly diverse client population thus, multicultural competence and cultural humility need to be emphasized in supervisee development. This development begins in supervision. In this study, multicultural competence represented the general knowledge and awareness of serving racially, ethnically, or culturally diverse clients, while cultural humility represents learning about the individual and unique experiences of racially, ethnically, or culturally diverse clients. Existing literature presents the benefits of infusing multicultural competence and cultural humility in clinical settings with clients. Yet, post-graduate supervisees' experience and perceptions of multicultural competence and cultural humility are mainly unknown. To address this gap, the researcher sought to explore and better understand how post-graduate supervisees experience and perceive multicultural competence and cultural humility in their supervision process and subsequently in their work with clients. A consensual qualitative research methodology was used to conduct ten individual qualitative interviews with post-graduate clinical supervisees. A consensual qualitative research coding process followed the interviews and five domains emerged. The five domains are "Supervisory Working Alliance," "Supervisee Perceptions of Self," "Perceptions of Supervisors," "Barriers to Infusing Multicultural Competence and Cultural Humility," and "Benefits to Infusing Multicultural Competence and Cultural Humility." The results concluded from this study have implications for informing future training and practices for supervisors, supervisees', and the clients being served. [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.]