[3] Jordan was offered a full scholarship to Yale University during World War II but declined it because of his support for, and ancestry from, Germany.

He continued swimming and improved several South American records during the war years while working for his father's company.

[4] He resumed participation in international tournaments following the conflict and competed in the 1948 Summer Olympics in London.

Participating in two events, he finished sixth in a field of thirty-two swimmers in the men's 200-metre breaststroke and eighth among fourteen nations in the men's 4×200-metre freestyle relay, alongside Sérgio Rodrigues, Rolf Kestener, and Aram Boghossian.

He was made head of Brazil's swimming delegation to the 1952 Summer Olympics in Helsinki, although he did not participate in any events, and retired from active competition in 1954.