He came to Catholic University after retiring from the Central Intelligence Agency in June 2016 with 26 years of service as an intelligence officer as well as 14 years in the United States Coast Guard. Professor Dujmovic teaches an introductory course on American intelligence and an upper-level course focusing on the issues that arise when intelligence activities are conducted by a democracy. He coordinates the inclusion of other intelligence-related courses at the University toward an undergraduate minor in Intelligence.