Following a short-lived career as a player agent – he had established a company called "Sport & Business World" in 1998 –, Dumitrescu took on his first position as a manager in 2000 signing with
Oţelul Galaţi from Romania's
Divizia A. From Galaţi he moved to
FC Brașov and then Cypriot side
Alki Larnaca in 2001–02. Here he won promotion to the
Cypriot First Division and his team started the season very well, beating some of the best sides in Cyprus. However at the end of the season his team finished 11th. He then took the head coach role of the
Romanian under 21 side. But Dumitrescu lasted only 6 weeks in the role. Subsequently, he took control of
FCM Bacău in Divizia A. However, after a disappointing season, Dumitrescu resigned in May 2003, leaving FCM Bacău in the relegation zone. Dumitrescu again went to
Cyprus, this time as a coach for
Apollon Limassol. By playing the Italian defensive system
catenaccio, they won 12 of their first 13 matches and Dumitrescu was named the best manager in Cyprus for the year 2004. Dumitrescu soon moved on to his 6th club side, being named manager of the Greek side
AEK Athens in February 2004. His roving managerial career continued as he left AEK to join
Egaleo, also from the
Alpha Ethniki. The next three years found him at three other Greek clubs:
Akratitos,
Kallithea and
PAOK. Dumitrescu was criticised for his style of play by PAOK fans. Having joined the club in February, he resigned in October. After three years without a club he became manager of
Panthrakikos in May 2009, but was sacked after only one game. He ended his coaching career at
Steaua București. He had spent only 40 days there, and resigned saying that he does not want to stay where he is not wanted. ==Personal life==