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Naomi van GreunenNG
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Naomi van Greunen

@naomivangreunen

Occupational Hygienist at Gijima OHES who managed monthly services across seven Thungela coal-mining sites.

South Africa
Message

At Gijima OHES, I managed monthly occupational hygiene services across seven Thungela coal-mining sites in Mpumalanga. I coordinated surveys and technical deliverables across underground and opencast operations, and improved workload planning to give the team clearer ownership.

I led, coached and assessed nine occupational hygiene employees. Four progressed to higher professional levels, including three who achieved ROHT registration and one who achieved ROH registration.

From November 2025 until I left Gijima OHES, I held SANAS Technical Signatory authorisation and approved work within the organisation’s accredited occupational hygiene scope. I also reviewed technical reports and introduced preventative quality checks to improve consistency.

At AssureCloud, I combined occupational hygiene consulting with Deputy Quality Manager responsibilities, supporting the Occupational Hygiene Inspection Body’s QMS in line with ISO/IEC 17020 and SANAS requirements. I’ve also conducted exposure risk assessments, surveys and measurement programmes, turning findings into practical control recommendations.

Experience

Work history, roles, and key accomplishments

GO

Client Manager & Occupational Hygienist

Gijima OHES

Mar 2024 - Mar 2026 (2 years)

Managed the Thungela occupational hygiene portfolio across 7 Mpumalanga mining sites, coordinating monthly surveys and technical deliverables. Led, coached, and assessed 9 occupational hygiene employees, supporting professional development and holding SANAS Technical Signatory authorisation.

AS

Occupational Hygiene Consultant

AssureCloud

Jul 2019 - Feb 2024 (4 years 7 months)

Performed occupational hygiene consulting while carrying formal additional responsibilities as Deputy Quality Manager from January 2023. Supported QMS implementation in line with ISO/IEC 17020 and SANAS, conducted internal audits, competency assessments, and prepared technical reports.

MO

Occupational Hygiene Consultant

Momentum OCSA

Jan 2016 - Jun 2019 (3 years 5 months)

Conducted occupational hygiene monitoring, workplace surveys, and exposure risk assessments across varied industrial environments. Measured and evaluated chemical, physical, biological, and ergonomic stressors, and prepared technical reports with practical recommendations.

Education

Degrees, certifications, and relevant coursework

SA

SAMTRAC

SAMTRAC, Occupational Health and Safety

Currently completing the SAMTRAC certification.

Minerals Council South Africa logoMA

Minerals Council South Africa

Chamber of Mines Certificate in Intermediate Mine Environmental Control, Mine Environmental Control

Completed the Chamber of Mines Certificate in Intermediate Mine Environmental Control in 2023.

NOSA logoNO

NOSA

Mine Health and Safety Act Course, Mine Health and Safety

Completed the Mine Health and Safety Act Course in 2023.

Microsoft logoMI

Microsoft

Microsoft Excel 2016 Intermediate, Microsoft Excel

Completed Microsoft Excel 2016 Intermediate certification in 2021.

Microsoft logoMI

Microsoft

Microsoft Excel 2016 Advanced, Microsoft Excel

Completed Microsoft Excel 2016 Advanced certification in 2021.

University of Pretoria logoUP

University of Pretoria

Occupational Hygiene Legal Knowledge Course, Occupational Hygiene Law

Completed the Occupational Hygiene Legal Knowledge Course in 2016.

North-West University logoNU

North-West University

BSc Honours, Physiology

Completed a BSc Honours in Physiology at North-West University in 2015.

North-West University logoNU

North-West University

BSc, Biological Sciences

2012 - 2014

Completed a BSc in Biological Sciences at North-West University from 2012 to 2014.

HC

Hoërskool Centurion

National Senior Certificate, General

Completed the National Senior Certificate at Hoërskool Centurion in 2009.

Tech stack

Software and tools used professionally

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