Dumitru was one of few coaches who have led South Africa's 'big three' clubs Kaizer Chiefs, Mamelodi Sundowns and Orlando Pirates.
The veteran coach had an illustrious career during which he amassed 18 trophies with Chiefs and Sundowns, including two back-to-back league championships with each side.
Dumitru started playing football with local side Sportul Studenţesc in the late 1950s, but a serious knee injury forced him to hang up his boots, as a result he began studying to become a coach.
He was appointed manager of the Namibia national team in November 2000 replacing Lucky Richter, but resigned a few months later after an argument with former Chiefs midfielder, Robert Nauseb.
He rejoined Mamelodi Sundowns and helped his side reach their first and only African Champions League Final in 2001, which they lost to record holders Al Ahly.
In South Africa, Dumitru was nicknamed "Master Ted", "Mr Magic" or "The Professor", because of his studious approach to the game.
Dubbed "The Puk Tawana Project", it produced 26 players who went on to play professional football who were on an accelerated development programme for 18 months.