Mureșanu took up fencing when he was 11 years old under coach Angelo Pellegrini at CS Progresul in Bucharest.

He took a bronze medal in the 1958 Junior World Criterium in Bucharest and in the 1959 edition in Paris, both in foil and sabre.

[1] Along with Iuliu Falb, Ion Drîmbă, Ștefan Ardeleanu and Mihai Țiu, he earned Romania's first team world title in fencing at the 1967 World Championships in Montreal.

[2] For his accomplishments he was named "honoured master of sports" (maestru emerit al sportului) in 1968.

[1] In parallel to his career as an athlete Mureșanu became a fencing coach at CS Viitorul.