Hassina is trained as physician and psychologist in Amsterdam and completed a postdoctoral appointment at Stanford University before coming to Harvard to further pursue a scholarly career in healthcare management. At Stanford, Hassina studied social and functional integration across 25 large health systems in the United Stated and collaborated with the Robert Wood Johnson Foundation, studying the role of business in the public square. These two streams of research led to an increasing interest in management through an organizational behavior lens and brought Hassina to the Doctoral Program at HBS.