Johan L du Plessis

du Plessis
Director: Occupational Hygiene and Health Research Initiative
Prof Johan L du Plessis

He holds BSc (Biological Sciences), BSc Hons (Physiology), MSc (Physiology) and PhD (Occupational Hygiene) degrees. He is currently appointed as Director of the Occupational Hygiene and Health Research Initiative (OHHRI) at the NWU.  His teaching and learning experience includes 21 years of teaching Physiology/Occupational hygiene to undergraduate students, and 14 years to postgraduate students. He has supervised more than 40 post-graduate students (Hons, MSc and PhD) who completed their studies in Physiology, but primarily in Occupational hygiene. To date, he has authored/co-authored 40 articles published in South African and international journals and 4 chapters in books. He presented numerous oral presentations at national and international conferences. He served as reviewer for numerous international journals. He is also a member of the Editorial Board of the journal, Occupational Health Southern Africa.


His research focus and expertise is on skin exposure to different stressors (chemical and physical) in the workplace. This includes assessing the potential risk of skin exposure, assessing actual levels of skin exposure and controlling the level of exposure.  His research also utilises skin bio-engineering methods where properties such skin pH levels are measured. Another research interest is regulatory toxicology, in particular occupational exposure limits (OELs). He currently holds a National Research Foundation Y2 rating.

He is a registered Occupational Hygiene Technologist (ROHT) with the Southern African Institute for Occupational Hygiene (SAIOH) and a member of the American Conference for Governmental Industrial Hygienists (ACGIH), the International Commission on Occupational Health (ICOH) and the Toxicology Society of South Africa (Toxsa). He served on the National Council of SAIOH (2010-2016), the professional body entrusted with registration of Occupational Hygiene professionals in South Africa. He served on a Technical Committee of the Department of Labour tasked with revision of the Regulations for Hazardous Chemical Substances and Lead Regulations (2013-2014).


Physical Address

Potchefstroom Campus, Building F10, Room G08A

Telephone Number
018 299 2434