since 1964, gleditsch has been at the peace research institute oslo (prio), first as a student, later as researcher and research leader. he was director of prio in 1972 and 1977-78. from 2002-2008 he led the working group 'environmental factors of civil war' at prio's centre for the study of civil war, appointed centre of excellence by the research council of norway. since 1993 he has also been professor at ntnu. gleditsch was editor of journal of peace research 1983-2010, succeeded by henrik urdal. gleditsch served as president for the international studies association (isa) 2008-09.