[1] A member of the Rally for Democracy and Progress (RDP), he was a high level member of the South West Africa People's Organization (SWAPO) from 1964, when he fled into exile, until 2002, when he was expelled from the party for "disobedience".
First going to then Tanganyika (now Tanzania), then the United States, Nyamu studied economics at the University of California, Berkeley.
From 1976 to 1980, Nyamu was the deputy secretary for information in Luanda, Angola and from 1980 to 1985, SWAPO's representative in Addis Ababa, Ethiopia.
Nyamu became the deputy permanent secretary in the Ministry of Foreign Affairs at independence in 1990.
In September 2010, Nyamu and 8 other opposition politicians were sworn-in as members of the National Assembly following a six month boycott due to electoral irregularities in the 2009 election.