Enrique Conrado Sieburger, Jr. (10 May 1924 – 23 January 1990) was an Argentinian sailor. He was born in Vicente López, Buenos Aires Province. He competed at the 1960 Olympics[1].
He was part of a sailing family. His father Enrique Sieburger, Sr. and uncle Julio Sieburger both competed at two Olympics. He sailed with his brother Carlos Sieburger and his cousin (Julio's son) Roberto Sieburger to fourth place in the 5.5m class at the 1960 Olympics.[2]. His sister Marylin married Jorge del Río Sálas, also an Olympic sailor for Argentina. Together with Jorge del Rio's cousin Jorge Salas Chávez, his Sieburger-Salas extended family has sailors who made twenty Olympic appearances for Argentina.