Many industrial domains experienced during the last decade a shift towards flexible and collaborative strategies adapted for global markets, like flexible supply networks. Competence management offers concepts and approaches which can be applied to identify, systematically develop and integrate organizational competence of suppliers in such networks. Based on a requirement analysis and two case studies, the paper investigates competence supply in flexible supply networks. The contributions of this paper are (1) requirements to competence management in flexible supply networks, (2) an approach to express competence demand based on enterprise models, and (3) recommendations how to adjust enterprise modelling practices and techniques based on the two cases studies.