Certified Industrial Hygienist (CIH)
Issued by: Board for Global EHS Credentialing (BGC)
Focus Area: Exposure assessment, occupational health, environmental hazards, and workplace risk control
What Is the CIH?
The Certified Industrial Hygienist (CIH) is one of the most respected credentials in occupational and environmental health. It validates advanced expertise in evaluating chemical, biological, and physical hazards that affect worker health and organizational safety. CIH holders demonstrate mastery across exposure science, toxicology, ventilation, ergonomics, and environmental risk management.
The CIH is an exam‑based credential designed for experienced industrial hygienists, EHS professionals, and occupational health specialists. It is widely recognized across manufacturing, healthcare, energy, government, and consulting sectors as the gold standard for exposure assessment and control.
Who Should Pursue the CIH?
The CIH is ideal for:
- Industrial hygienists and occupational health professionals
- EHS managers and environmental health specialists
- Professionals responsible for exposure monitoring and hazard evaluation
- Consultants working in environmental, industrial, or occupational health settings
- Risk and insurance professionals evaluating workplace health exposures
The CIH is especially valuable for professionals seeking senior technical roles, consulting authority, or leadership positions in occupational health and safety.
What You’ll Demonstrate
The CIH credential reflects advanced competency in:
- Exposure assessment and monitoring strategies
- Chemical, biological, and physical hazard evaluation
- Toxicology and health risk analysis
- Ventilation, engineering controls, and respiratory protection
- Environmental health and pollution prevention
- Ergonomics and human factors
- Program management and regulatory compliance
Program Requirements
To earn the CIH designation, candidates must:
- Hold a bachelor’s degree in a science, engineering, or related field
- Complete approved coursework in industrial hygiene and exposure science
- Meet BGC’s professional experience requirements (typically 4+ years)
- Pass the CIH examination, covering the full industrial hygiene body of knowledge
- Maintain certification through continuing education and recertification cycles
How Long Does It Take?
Most candidates complete the CIH process within 1–3 years, depending on coursework, experience accumulation, and exam preparation.
Career Impact
Professionals with the CIH often work in:
- Industrial hygiene and occupational health departments
- Manufacturing, energy, chemical, and industrial operations
- Environmental and occupational health consulting
- Government agencies and regulatory bodies
- Risk control, loss prevention, and insurance advisory roles
The CIH signals advanced technical expertise, strong analytical capability, and leadership in protecting worker health and managing environmental exposures.
