Starting postgraduate research on fluid dynamics at the age of 23 in 1963, John later became a professor of mathematics and was the head of the Mathematics Department from 2001-2005.
Ukuqala ucwaningo postgraduate kwi fluid dynamics eneminyaka engu 23 e 1963, kamuva uJohane waba uprofesa wezibalo kanye wayeyinhloko uMnyango Mathematics University kusuka 2001-2005.