Abstract
Theoretical and empirical controversies exist about the understanding and potentials of the concepts of competence and professional expertise. In this chapter, both concepts will be thoroughly conceptualised and discussed. Competence and professional expertise are important as all professionals need to possess a high degree of competence or expertise in their specific job domain, to enable their own career development and to stimulate laypersons of their own profession to have faith in their professional approach. In addition to this conceptualisation, different stages of competence or professional expertise will be discussed. As competence and professional expertise are interpreted to have the same meaning, the remainder of the chapter will focus on professional expertise. It is not only essential to discuss what is being learned, that is, professional expertise, but also how one is learning, which is defined in this chapter as professional (expertise) development of employees. Therefore, the chapter will continue with defining professional (expertise) development. Specific attention will be paid to the teaching profession, where professional (expertise) development is more important than ever. Because a difficult question for working organisations is which organisational conditions are significant for the further development of professional expertise of their employees, this chapter will end with a helpful overview of these ones that have proven to have predictive validity in this regard.
