One of the most important company resources is its employees and especially its executives. The importance of qualified managers is therefore high for the companies and leadership development is of key strategic importance. If the necessary leadership competences find a differentiated view, it becomes clear that self-reflectivity is of particular significance. Thus, a constantly changing environment and the fast-paced life of today mean that routinely experienced patterns of action are no longer applicable for the executives. In order to meet the associated challenges, the ability to self-reflect and the knowledge about one's own personality is particularly important. Self-reflectivity and its relevance in applied leadership development therefore form the main focus of this master's thesis. Thus, in the theoretical part, the topic is broadly examined by considering, in addition to the definitions of the concept of leadership and competence, the (competency-directed) development of leadership and, subsequently, self-reflection and its development. In this context, various methods are presented that support the development of self-reflectivity. In addition to the theoretical knowledge, an empirical investigation is carried out. Within these, 100 organizations were contacted in Austria and Germany. With a response rate of 29 percent, the self-generated questionnaire provided the insights that the self-reflective ability of executives is regarded as very important for their success, and that development activities in applied leadership development are reflected in self-reflectivity.