At one time or another Rădulescu had been associated with the Romania national team as either coach, manager or administrator within the Romanian Football Federation between 1923 and 1938.

[1] Rădulescu served as an officer for the Romanian Army during World War I at the front in the Battle of Mărăști between 1916 and 1918 in which he had received injuries to his right arm.

[2][3] In 1919 he featured as a goalkeeper for the Romanian army team at the Inter-Allied Games held at the Pershing Stadium, in Paris.

[2][3] His first spell as the coach of Romania's national team took place at age 27 in 1923 for only one game, a friendly which ended 2–2 with Turkey.

[2][5] His second spell started in 1928 at the Friendship Cup where he lost with 3–1 in front of Yugoslavia, but afterwards he earned victories against Bulgaria with 3–0, Greece with 8–1 and Yugoslavia with 2–1, before going at the 1930 World Cup where he earned Romania's first victory at the competition, a 3–1 against Peru, losing the second game of the group with 4–0 in front of hosts and eventual winners, Uruguay.