This chapter explores the foundational elements of training, supervision, and personal development in schema therapy. It begins by outlining the core competencies required for schema therapists, including limited reparenting, empathic confrontation, and self-awareness. The text emphasises the importance of these skills in addressing maladaptive schemas and enhancing the therapeutic relationship. Additionally, it discusses the structure and content of standard, advanced, and supervisory-level schema therapy courses. Group schema therapy is highlighted, with a focus on the complexities of group dynamics and the specific training needed for effective practice. The chapter also delves into personal schema group therapy designed for mental health professionals, addressing common challenges and strategies for fostering vulnerability and growth. To illustrate these concepts, case vignettes are used throughout the chapter, providing practical examples of challenges faced in therapy and supervision. This comprehensive approach ensures that schema therapists are well-prepared to navigate both individual and group therapy settings while maintaining personal and professional development.