Abstract
Human knowledge and competence is a critical resource for achieving the goals of EM. In particular, the competency of the modeling expert is a critical resource in EM application. Modeling experts are responsible for the effective adoption of a chosen method and for the project to reach its goals using the assigned resources. In this chapter, the necessary competency of experts in a modeling project is described. This includes competency related to modeling, competency related to managing EM projects and competency related to the different purposes of EM.