the administrator: your guide to the estj personality type

Jaroslaw Jankowski holds a Master of Education degree from Nicolaus Copernicus University in Torun, Poland and an MBA from the Brennan School of Business at the Dominican University in River Forest, Illinois, USA. The research and development director of an international NGO and an entrepreneur, he is also involved in voluntary work. He is not only committed to promoting knowledge about personality types, but is also the creator of ID16, an independent personality typology based on the theory developed by Carl Gustav Jung.