His particular interests lie in 'professional dialogue', distributed leadership in schools, and the role of values in management and board (Policy Governance). Hartger works with boards and management teams within single educational organizations and trains groups composed of teams from different organizations. He also provides individual coaching for educational executives. Hartger participated in the 2010 UK Policy Governance® AcademySM. He is affiliated to NIVOZ, an independent Dutch think tank on education. At NIVOZ he helps building an online and offline Forum that provides a space for researchers and practitioners to engage in dialogue on fundamental themes with regard to good education.post@hartgerwassink.nl