Diergaardt grew up in
Rehoboth and attended school there at
Dr Lemmer High School. He graduated from
Peninsula Technikon with a Diploma in Cost and Management Accounting. Afterwards he obtained a Higher Diploma and a master's degree in the same discipline from
Technicon SA, a distance university. In January 2011 he was appointed Deputy Minister of Lands and Resettlement, and in March 2015 he was appointed one of two Deputy Ministers of Agriculture, Water and Forestry. ==References==