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SAIOH Council Members




Kenneth Hlungwane is a certified Occupational Hygienist with more than 10 years of experience in the field of occupational hygiene. He was born in 1981 and raised in Malamulele in the Limpopo Province. After completing his studies at the Technikon Pretoria currently named as Tshwane University of Technology in 2004 and he was placed to do a one year Mandatory Environmental Health Community Service for the Mpumalanga Department of Health in 2005. After completing the community service he was employed by the City of Johannesburg as an Environmental Health Practitioner until 2007 when he Joined SHElinK Occupational Hygiene Consultants. In 2008 Eskom had started massive built program where he was appointed to establish an Occupational Hygiene Programme for the construction of Eskom Ingula Pumped Storage Scheme which is a hydro power station which comprised of the underground tunnelling and surface works. He was then moved to Eskom Kusile Power Station Constriction Project to manage the occupational hygiene programme with more than 22 000 employees on site.



Jaco is a certified Occupational Hygienist with more than 19 years of experience in the field of occupational hygiene. He was born in 1970 and raised in Bethal in the Mpumalanga Province. After completing his studies at the Tshwane University of Technology in 1991 and his National Service in 1992, he was appointed in the South African Military Health Services as the Staff Officer 3, Occupational Hygiene for the Limpopo Province. In 2000, he was promoted to the rank of Lieutenant Colonel, and appointed with a double cap appointment as the Regional Occupational Health and Safety Centre Manager and as the Staff Officer 1 for Occupational Hygiene, responsible for Occupational Health and Hygiene services in the Mpumalanga and Limpopo Provinces. In 2008, he was transferred to the Area Military Health Formation in Pretoria with the aim to coordinate and oversee the Occupational Hygiene Program on a National and Regional Level within the South African National Defence Force. He left the South African National Defence Force in 2010, where he was appointed in the Gauteng Department of Health and Social Development, as a Deputy Director for Occupational Hygiene.



Julie is a Chartered Member of the Faculty of Occupational Hygiene (CMFOH – BOHS) and a Registered Occupational Hygienist (ROH-SAIOH). She holds the DipOH (BOHS).

Julie presently coordinates and runs the OHTA international training modules at DOEH UKZN.  Julie has over 28 years of experience in both corporate and consulting as an Occupational Hygienist and has served on the SAIOH Council and PCC in various capacities for over 25 years.



Richard is currently registered with SAIOH as an Occupational Hygienist.  He became registered as an Occupational Hygienist in 2009 and joined Sasol Synfuels in 1997 as an Occupational Health Practitioner. He was responsible to promote and implement an Occupational Health Program across Sasol Synfuels. It was during this period that he developed a strong interest in Occupational Hygiene and subsequently pursued his Occupational Hygiene passion through Technikon Pretoria (TUT) on a part time basis. After obtaining his Occupational Hygiene qualification, Richard was transferred to Sasol Synfuels Occupational Hygiene Department. He started as an Occupational Hygiene Technician in Training and after completing his training program he was promoted to an Occupational Hygiene Technician position and later to Senior Occupational Hygiene Technologist and finally to an Occupational Hygienist. He worked for Sasol for about 16 years, primarily in the Occupational Health sector and the majority of his time was spent practicing Occupational Hygiene. 



 Sean has served on the PCC for many years and actively contributed to the content and organising of Branch Meetings over the years, facilitating or presenting many times in his capacity as an OH. 

As a vocal and valuable contributor, Sean is a highly active member of the KZN Branch structure. Sean actively and positively engages in committee and branch duties and also ignites discussion in branch meeting, no matter what the topic. 

Sean is also a tireless brand ambassador for SAIOH and takes every opportunity to market the importance, career pathing, administration, impartiality, ethics and structure of SAIOH and OH in general.  

Sean’s greatest contribution, in terms of imparting knowledge, intellect, insight and experience, has been his participation in the development of the Oral Assessor, Self-Assessment, PLP and Mentorship programmes. As a part of the KZN Team, Sean volunteered literally hundreds of hours to the development of these programmes and was instrumental in their successful completion for release to the PCC and greater SAIOH membership.


SAIOH COUNCILOR - Johan L du Plessis

Johan is an Associate Professor and Niche Area Leader of the Occupational Hygiene and Health Research Initiative (OHHR) at the North-West University, Potchefstroom Campus. He holds a PhD degree in Occupational Hygiene.  His teaching experience includes 19 years teaching Physiology to undergraduate students and 12 years to postgraduate students. Johan has supervised more than 20 post-graduate students.

To date, Johan has authored / co-authored two chapters in books and numerous articles published in South African and International journals. He presented numerous oral presentations at national and international conferences. A highlight of his research career thus far is holding an Y2 rating from the National Research Foundation as a young scientist. He currently serves as reviewer for three international journals and one South African journal. He is also a member of the Editorial Board of the journal, Occupational Health Southern Africa. His expertise is on skin exposure in the workplace in particular, exposure to hazardous chemical substances. This includes assessing the potential risk of skin exposure, assessing actual levels of skin exposure and controlling the level of exposure.  He served on the Technical Committee of the Department of Labour tasked with reviewing the Regulations for Hazardous Chemical Substances and Lead Regulations from 2013 to 2014. Since 2010 he also serves on the National Council of SAIOH.



Claudina Nogueira holds BSc, BSc (Hons) and MSc (Medical Biochemistry) degrees from the University of the Witwatersrand in Johannesburg, South Africa, and Modules in Occupational Hygiene from the British Examination Board in Occupational Hygiene (BEBOH). Claudina is an occupational health practitioner currently employed as a part-time researcher at Healthy, and consulting in her private capacity

From September 2011 to June 2015, Claudina held the post of Senior Health and Safety Advisor at the global mining company Anglo American’s Technical Solutions division, in Operations Support: Sustainable Development and Civil Engineering, in Johannesburg. From March 1990 to August 2011, Claudina was employed at the National Institute for Occupational Health (NIOH; South Africa’s major centre for occupational health development, training, service support and research), as a Medical Natural Scientist in a research post (1990 – 2003); and as Head of Section: Communication, Training and International Liaison (2003 – 2011). 

Claudina’s current affiliations:

  • Council Member of the Southern African Institute for Occupational Hygiene (SAIOH) - Portfolios: Liaison, Marketing & Communication

  • Board Member of the International Commission on Occupational Health (ICOH) for the 2012 – 2015 triennium and re-elected for a second term as Board Member (2015 – 2018)

  • Member and Secretary of the ICOH Working Group on Occupational Infectious Agents (WG OIA)

  • Member of the ICOH Scientific Committee on Mining Occupational Safety and Health (SC MinOSH)

  • Board Member of Workplace Health Without Borders (WHWB) since September 2014

  • Exco Member of the South African Society of Occupational Medicine (SASOM)  


Cas holds a number of tertiary qualifications in the area of physiology, occupational health and hygiene and mine environmental control, including a PhD degree in Occupational Hygiene from the North-West University, Potchefstroom Campus.  He is a registered Occupational Hygienist working in the field of occupational health and hygiene for more than 20 years. Cas joined Anglo American in November 2010 as Group Lead: Occupational Health and Hygiene.  He serves on a number of national and international advisory and technical committees and has co-authored a number of articles and publications. Specific areas of interest include occupational health and wellness in the mining industry, health risk assessment, and exposure to chloroplatinates, nickel and diesel engine emissions. Cas is actively involved in occupational hygiene skills development and research and is appointed as Associated Professor in Occupational Hygiene at the North-West University, Potchefstroom Campus and as Honorary Lecturer in the School of Public Health, University of Witwatersrand, South Africa.



Oscar is a SAIOH certified Occupational Hygienist with solid industry experience in the oil refining, gas, explosives and downstream chemical industries. He has been under the employment of Sasol on its facilities at the Northern Free State town of Sasolburg since completing his undergraduate studies. He currently holds the position of an Occupational Hygiene Specialist and a Technical signatory in terms of the requirements of SANAS 17020. He holds a Bachelor’s Degree: Environmental Health from the Tshwane University of Technology with specialisation in Occupational hygiene and air pollution control. He also holds a Legal Knowledge Certificate for Approved Inspection Authorities. Oscar views himself as a developing Occupational Hygienist and is currently registered with the Tshwane University of Technology for a Master Degree in Environmental Health with specialisation in Occupational Hygiene. Oscar has been and continues to serve SAIOH on the PCC as an examination assessor. He also presents occupational hygiene subjects to Environmental Health undergraduate students at the Tshwane University of Technology on a part-time basis. His passionate contribution to the growth of the OH as a profession is through the mentoring and holding of technical discussions with interested upcoming occupational hygiene professionals. 


Became a member of OHASA back in 1982. Served for almost 8 years on the OHASA Council, mostly as the Secretary.

In 1993 also joined the IOHSA Council until the 2 Associations amalgamated to become SAIOH.

Was elected onto the SAIOH PCB in 2002 and became the Chairperson the next year. Also became the Vice President of SAIOH in 2004, and then the President from May 2005 – August 2008.

In 2007 elected/appointed to represent SAIOH on the IOHA NAR Committee and in 2012 elected as the IOHA NAR Chair until April 2015. During this time also took over as the SAIOH representative on the IOHA Board and became an IOHA Councillor in Sep 2009 – Sep 2015.

During the years 2005 and 2016 he was also instrumental in two IOHA NAR Accreditations, in 2006 and again in 2012, hosting the IOHA 2005 International Scientific Conference in Pilanesberg, and again became the Chairperson of the PCB (now PCC) until the end of 2015 and became one of only 3 Fellow members of SAIOH in 2012 . He also served as an Exco member and SAIOH Councillor until the end of 2015. In 2016 he was again co-opted onto the SAIOH Council, and also serve currently as the Chief Examiner of the SAIOH PCC.

He is the Business Manager of Gijima OH&ES, an Occupational Hygiene Consultancy and starting as an DoM AIA  in 1981 and became SANAS 17020 accredited and a DoL OHS AIA in the past 2 years. He started this Consultancy in 1980 as the Columbus Stainless OHS with 2 people and have to date 64 personnel employed, as OH Practitioners, Environmental and in an OH Analytical Laboratory (SANAS 17025) personnel, with a Countrywide footprint (Middelburg, Centurion, Newcastle and Northern Cape).

In his personal life he is nearing retirement age, were Married (in 1979), his Wife an PhD in Cyber Security (CSIR), they have 2 children, one now also a PhD in Journalism (UJ). His passions: Occupational Hygiene, travel, collect wine and … drink beer for a hobby.




Possess a Masters in Public Health (Occupational and Environmental Health); Occupational Hygiene PhD Candidate at Wits School of Public Health. Have acquired knowledge of legislations governing occupational health and safety, environment and hygiene; have technical skills on occupational and environmental hygiene measurements (noise, Crystalline Silica, air quality, Diesel particulate matter, coal dust, welding fumes, CTPVs/PAH, illumination); have perfect presentation and report writing skills; good interpersonal, communication and training skills.

Area of interest is researching on the contribution of occupational hygiene stressor in the occurrence of accidents in mining and non-mining industries. Focusing on elimination and control of occupational stressors; mainly Hazardous Chemical Substances, noise, and safety issues, I believe in the old school of thoughts “prevention is better than cure”. Aspire to be a well-established scientist/researcher in environment, occupational hygiene and safety.

Work experience includes:

·         Gauteng Department of Health: Occupational Hygiene and safety specialist

·         CSIR: Centre for Mining Innovation: Researcher: Occupational Hygiene

·         GIJIMA: Occupational Hygiene Technologist

·         Transnet Freight Rail: Business Occupational Hygiene Specialist

·         University of Johannesburg: Occupational Health and Safety Specialist


Dr Ivan Niranjan lectures in Occupational Health and Safety at undergraduate and postgraduate level for the National Diploma, Bachelor of Technology and Master of Technology in Environmental Health at the Durban University of Technology.  Dr Niranjan was an Inspector of Occupational Health and Safety with the Department of Labour in three provinces namely Gauteng, Kwa-Zulu Natal and Eastern Cape.

He was responsible for administering and enforcing the provisions of the Occupational Health and Safety Act, 1993.  Dr Niranjan has a Bachelor of Technology in Environmental Health from Technikon Natal and Masters in Public Administration through the University of Kwa-Zulu Natal and a Doctorate in Technology in Quality Management. He is a registered Occupational Hygienist with the South African Institute of Occupational Hygienist (SAIOH).



Christa was born in Pretoria in 1985 and matriculated in 2003 from Pro Arte Alphen Park School. She acquired a BSc Degree in Nutrition, Psychology and Physiology in 2006 and an MSc degree in Occupational Hygiene in 2011 from the North West University (Potchefstroom campus). She started her career in occupational hygiene as a consultant with Gijima in Pretoria and is currently working as an Occupational Hygienist in Gijima’s Mines and Works team based in Middelburg. 



Celia's  tertiary education is comprised of a National Dip, National higher Dip Public Health and a GradDip: Occupational Hygiene: Deakin University Australia. She worked for DOL for 5 year, then moved onto to Chevron/Caltex refinery where they sent her around the world from Australia, Singapore, America to work on various refineries. In 1997 she met a wonderful man, got married and settled down. In 1999 started her own AIA ( Occupational Hygiene monitoring Services) and have been busy ever since! Her hobbies include supping, jogging and spending time with my fury friends.  


Jaco holds a BS.C-Degree (1999) as well as a BS.C (Hons) Degree in Physiology (2000). He is a registered and qualified Occupational Hygienist with SAIOH for more than 9 years. 

Prior to his appointment as Managing Director at EXCO services, Jaco held various positions such as Senior Consultant and Regional Manager.  He was also employed by an International Risk Management Company for two years where he consulted in ISO 9001, ISO 14001, OSHAS 18001, BBS (Behaviour Based Safety) and EBMS (Electronic Based Management Systems).  As Managing Director of EXCO Environmental and Occupational Hygiene Services – Gauteng, Jaco brought to his positon a well-established background in Environmental and Occupational Hygiene as a wealth of professional knowledge and hands-on experience gained throughout the Western Cape, Eastern Cape and Gauteng regions.  As a person, Jaco is energetic and passionate about science and technology, especially to all things related to Occupational Hygiene. Contributing qualities such as being a good motivator which excels at inspiring his team of co-workers by setting a good example to lead his team as a professional consultant and mentor.





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