Kozonguizi was born in January 1932 in Windhoek Namibia and grew up in Warmbad in South Africa where he completed high school.
In that year he, Mburumba Kerina, Zedekia Ngavirue formed the South West Africa Students Organization at Fort Hare University.
In 1956, Kozonguizi spoke before the United Nations on the issue of South West Africa along with Reverend Michael Scott, Mburumba Kerina, Hans Beukes, Markus Kooper, Sam Nujoma, Ismael Fortune, Jacob Kuhangua and Hosea Kutako.
[2] After serving as a lawyer in London for a short time, Kozonguizi returned to Namibia in 1976 as legal advisor to Clemens Kapuuo and the OvaHerero delegation at the Turnhalle Constitutional Conference becoming an advocate in the process.
Kozonguizi joined the National Unity Democratic Organisation (NUDO), a party that was part of the DTA at that time.