[2] Born in Andara, Kavango Region,[3] Diescho attended Fort Hare University in South Africa where he studied law and political science.
During his student days he worked against the apartheid system and was imprisoned in Peddie and East London.
In 1984, he became a Fulbright scholar at Columbia University in New York City, where he completed his PhD in Political Science in 1992.
In 1997–8, he was the founder and presenter of The Big Picture, a weekly economic and political analysis programme on SABC 2.
Diescho was the executive director of the Namibian Institute of Public Administration and Management (NIPAM) from 1 July 2013 until December 2015 when he was dismissed without a clear reason.