Dionisie Alexandru Ghermani was born in Bucharest. His father, Dionisie Germani (Ghermani) (1877–1948), was an engineer, professor, dean of Construction Faculty of Polytechnic University of Bucharest, and a political activist of the fascist Iron Guard. Dionisie Ghermani attended Saint Sava National College until 1941 and then graduated from the University of Berlin.
While a student at the Saint Sava National College, Dionisie Ghermani joined the local organization of the Cross Brotherhood (Frăţia de Cruce), part of the Iron Guard. He became a leader of a Brotherhood of the Cross in Bucharest. After the unsuccessful Iron Guard Rebellion (January 21–January 23, 1941), he became a political exile in Berlin, Germany.
In 1944–1945, he was a collaborator of the Romanian National Government-in-exile in Vienna, led by Horia Sima. In 1945 became a prisoner of French occupation forces at Innsbruck-Reichenau concentration camp. In August 1946, Dionisie Ghermani was liberated from Innsbruck-Reichenau. Then, he collaborated with British intelligence.
He founded the Institut für Rumänienforschung, Munich / Unterhaching (1987). Also, Dionisie Ghermani founded German Romanian Interdisciplinary Research Institute in Bucharest (1994) as a branch of Institut für Rumänienforschung; since 1995, it is autonomous.
Dionisie Ghermani died in Bucharest on July 5, 2009.
