Career
He being the younger brother of Emil Dumitriu (Dumitru II) and the elder brother of Constantin Dumitriu (Dumitriu IV). He played as a youngster for Rapid București before beginning his senior career at CS Târgoviște. After a year he moved to American Statistical Association Târgu Mureș, where he played for 4 years.
In 1968, he signed with Steaua București, where he played until 1972, when he returned to Rapid.
He also played for Olimpia Satu Mare, FCM Galați and for ICSIM București. After he quit playing in 1977, he become quickly a player/manager for ICSIM București, amongst others in the beginning he managed lower league teams to gain more experience like Rapid Fetești, Autobuzul București, Steaua Mizil, and Rulmentul Bârlad.
The highlight of his career as a manager was with Steaua Bucureşti, qualifying them three times in a row in the Union of European Football Associations Champions League and also winning Divizia A in 1995, 1996, 1997 and 2005. Plus two Romanian Cup titles in 1996 and 1997, and a Romanian Supercup title in 1995.
In the 1997-1998 season he reached the Cup Winners" Cup quarter-finals as AEK Athens Football Club manager, losing a semifinal place to Lokomotiv Moscow in the last minute of second leg´s injury time.