Career
He competed in the team foil events at the 1964, 1968 and 1972 Summer Olympics. He was named "master in sports" (Maestru al sportului) in 1966, then "honoured master in sports" (Maestru emerit al sportului) a year later. After his retirement as an athlete, Flab became a fencing coach, working for several clubs and for the National Institute of Physical Education in Bucharest.
He also served as an national and international referee.