Until the World War II and the prohibition of rugby league, he is the most capped player for France, which under his captaincy, he led to its first European Nations Cup in 1939, along with François Noguères, Maurice Brunetaud and Joseph Desclaux.

During the 1937–38 Kangaroo tour Rousié captained France against the dominant visiting Australian side, playing at five-eighth in the first test match and at centre in the second, kicking one goal.

He was engaged in war as a gunner and was awarded the Croix de Guerre, later, once he was demobilized, he could not resume playing rugby league due to its prohibition by the Vichy Regime.

He then played three seasons for Nice, competing in the Coupe de France in 1942 with the Provence Litoral representative team before ending his sporting career.

Later, he worked in the oil site at Hassi-Messaoud in Algeria as well as physical education instructor and died due to a road accident on 2 June 1959 after commemorating with fellow former rugby league players the 25th anniversary of the birth of the sport in France.