Singapore certification scheme
Registered Industrial Hygienist RIH (SG)
A professional certification pathway for industrial and occupational hygienists who protect worker health through competent anticipation, recognition, evaluation, and control of workplace hazards.
Explore the scheme
Everything you need to understand, apply, and stay professionally current.
The homepage provides a direct route to every major area of the RIH (SG) website.
About
Explore the scheme
Purpose, history, and professional standing
Learn how the scheme was established, how it is administered by OEHS, and how it supports high industrial hygiene standards.
Accreditation
Compare criteria
RAIH (SG) and RIH (SG) criteria
Compare education, coursework, experience, ethics, and assessment requirements for both designations.
Application
Start the process
Application stages and assessment route
Review required documents, deadlines, fee notes, downloads, and the pathway from submission to assessment.
Professional conduct
Read the code
Code of Ethics
Understand the principles that govern competence, integrity, confidentiality, public interest, and professional accountability.
Registry
Open the registry
Verify professional recognition
Access registry information for RAIH (SG) and RIH (SG) professionals and review current designation status.
Resources
View resources
Guidance, forms, and reference materials
Find scheme documents, professional guidance, downloadable materials, and supporting resources in one place.
Industrial hygiene practice
A disciplined sequence for protecting worker health.
The RIH Scheme reinforces professional practice across the core industrial hygiene process.
Next step
Ready to review your eligibility?
Check the latest accreditation requirements and application pathway for RIH (SG) and RAIH (SG), or contact the Secretariat for guidance.