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He served in the American army as a paratrooper in The 101st Airborne Division from 1942 to 1945 while his brother Vladimir Dedijer fought for Tito's Partisans. He jumped over Normandy with the task to bodyguard the Major General Maxwell Taylor.
He was also the Head of the Belgrade Nuclear Institute 1949–1954.
Stevan was awarded a PhD from the University of Lund in Sweden. He was also the founder of the Research Policy Institute at Lund University. His research focus was on Business Intelligence and he has been named the grandfather of business intelligence by his friend, the late CIA Director William Colby.
Prof. Dedijer was the first person in Europe to teach business/competitive intelligence at a university. He was a co-founder of the Swedish Intelligence Network BISNES (Business Intelligence & Strategy Network Scandinavia).
Stevan Dedijer was awarded the SCIP Meritorious Award for his services in this field.
He died in his home in Dubrovnik, Croatia.