Dr Roger Diamond is a lecturer in hydrogeology and geochemistry at the University of Pretoria (UP). He studied geology at the University of Cape Town (UCT), and received a Master of Science in 1997. Thereafter, he worked in Australia as a gold exploration geologist, then as a hydrogeologist for the Western Australian state government.

After returning to South Africa in 2002, Dr Diamond worked for the Western Cape government and as a consultant for environmental science associates in various aspects of environmental management, before returning to UCT in 2010 to do his Doctor of Philosophy, which he obtained in 2014.

He then joined UP, where he lectures and conducts research on water quality and hydrochemistry. His research also focuses on nitrates, uranium, radon, hydrogen, oxygen and nitrogen stable isotopes.

Dr Diamond has been a member of the Ground Water Division of the Geological Society of South Africa for many years and takes part in several environmental and conservation efforts, especially the removal of invasive alien plants with the Mountain Club of South Africa. When he is not looking at rocks, he is out climbing up them.