School-based mental health (SBMH) services are receiving robust attention as schools themselves are raising concerns about increased student mental health needs. Policy makers are subsequently questioning whether providers have the training and supervision necessary to navigate the unique needs of delivering mental health in a school setting. Although there is broad consensus that clinical supervision serves a vital function in the fields of counseling and therapy, research continues to highlight the difficulty in defining clinical supervision in terms of its practices and processes. The purpose of this qualitative, phenomenological study was to articulate and explore the experiences of clinical supervisors working in SBMH settings located in Minnesota, USA, through a lens of the Common Factors metatheory. A subsidiary purpose of this qualitative, phenomenological study was to identify and explore how cultural sensitivity informs the common processes and practices of clinical supervisors working in SBMH settings. Data was gathered from nine participants through semi-structured interview questions. The results of this study indicated four primary themes: supervisors utilizing relational common factors, supervisors using common factors interventions, utilizing roles to conceptualize supervision, and using common factors to navigate school systems. Two subsidiary themes were also found: multicultural sensitivity and the supervisory alliance, and supervisor identity and multicultural sensitivity. Recommendations include inclusion of common factors practices and processes within training and supervision in SBMH, the intentional inclusion of culturally sensitive practices in supervision, and further attention to increasing the scope and methodological rigor to understand the multi-contextual experiences within the supervisory relationship. [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.]