Esau was born in
Swakopmund,
Erongo Region on 9 December 1957. He earned his matric at St. Josephs Training College in
Döbra in 1977 and graduated from the
University of Fort Hare in 1984 with a degree in commerce. Esau rose through the
Mineworkers Union of Namibia to become secretary general of the umbrella
National Union of Namibian Workers (NUNW) in 1991. In 1992, during a time of debate concerning the role of Namibia's trade unions, Esau favored maintaining an alliance with SWAPO. However, Esau later in 1994 suggested that the trade unions could form their own political party if workers' rights continued to be ignored by the SWAPO government. In the same year he was placed on the National Assembly list for SWAPO and was voted into the National Assembly in the
parliamentary election. Esau was a member of the
politburo of SWAPO from 1991 to 1997, and in the 2010s, and of the
central committee of the party since 1991. As deputy
minister of Trade and Industry, Esau supported liberal economic policies, including the setting up of
export processing zones in Namibia where labour laws do not apply. ==Bribery scandal==