Having been implicated "in absentia" in the series of show trials inaugurated in the wake of Communist Romania by the Tămădău Affair, accused of being a spy, he decided to remain abroad. He left for Paris and was subsequently involved in advocacy of anti-communist political causes and the rallying of exiled intellectuals. Briefly employed by the International Refugee Organization, Djuvara became involved with the body of Romanian exiles, the Romanian National Committee, and helped organize American-assisted drops of voluntary paratroopers in support of the Romanian anti-communist resistance (most of whom were captured by the Securitate). He renounced his position by 1951, and subsequently worked for the exile magazine "Casa Românească".