1.4 Safety Officer Classifications, Roles, and Responsibilities (SO1 to SO4)

Key Takeaways

  • Safety Officers are classified into four levels: SO1 (Orientation + Trainer), SO2 (40-hr BOSH/COSH), SO3 (40-hr BOSH + 48-hr advanced + 2 yrs experience), and SO4 (Certified OSH Consultant/Practitioner).
  • Low-risk establishments employing 1 to 9 workers require at least one SO1, while low-risk establishments with 10 to 50 workers or high-risk establishments with 1 to 9 workers require a designated SO2.
  • High-risk establishments with more than 50 workers must employ a full-time SO3 or SO4 depending on total headcount.
  • Occupational Health (OH) personnel requirements dictate a part-time/full-time nurse, physician, and dentist based on workplace risk classification and worker population.
  • Safety Officer 2 (SO2) core responsibilities include hazard identification, risk assessment, conducting 8-hour worker OSH orientations, investigating incidents, and serving as HSC Secretary.
Last updated: July 2026

1.4 Safety Officer Classifications, Roles, and Responsibilities (SO1 to SO4)

Under DOLE Department Order No. 198-18 and updated policy directives under DO 252-25, the qualification, appointment, and deployment of Safety Officers in the Philippines are strictly regulated based on workplace risk classification and worker population. This section analyzes the four-tier Safety Officer framework, minimum staffing matrices, Occupational Health personnel rules, and operational duties of a Safety Officer 2 (SO2).


Safety Officer Hierarchy (SO1 to SO4)

DOLE categorizes Safety Officers into four distinct qualification levels, establishing progressive training, educational, and professional experience requirements:

  +-------------------------------------------------------------------+
  | SO4: Full-Time Certified OSH Consultant                           |
  | -> 40-hr BOSH + 80-hr Advanced + 320 hrs OSH Practice + Cert      |
  +-------------------------------------------------------------------+
  | SO3: Full-Time Safety Officer                                     |
  | -> 40-hr BOSH/COSH + 48-hr Advanced OSH + 2 Years OSH Experience  |
  +-------------------------------------------------------------------+
  | SO2: Full-Time / Part-Time Safety Officer                         |
  | -> Mandatory 40-hour BOSH / COSH Training Course                  |
  +-------------------------------------------------------------------+
  | SO1: Low-Risk Micro Establishment Safety Officer                  |
  | -> Mandatory 8-hour OSH Orientation + 2-hour Trainer Course       |
  +-------------------------------------------------------------------+

1. Safety Officer 1 (SO1)

  • Qualifications: Completion of the mandatory 8-hour OSH Orientation Course for Safety Officers plus a 2-hour Trainer module conducted by DOLE, OSHC, or accredited Safety Training Organizations (STOs).
  • Deployment: Restricted exclusively to Low Risk Micro Establishments (employing 1 to 9 workers).

2. Safety Officer 2 (SO2)

  • Qualifications: Completion of the mandatory 40-hour Basic Occupational Safety and Health (BOSH) or Construction Occupational Safety and Health (COSH) training course from an accredited STO.
  • Deployment: Serves as primary Safety Officer in Low to Medium Risk establishments, or as assistant Safety Officer in High Risk establishments.

3. Safety Officer 3 (SO3)

  • Qualifications: Completion of mandatory 40-hour BOSH/COSH, at least 48 hours of specialized/advanced OSH training, and a minimum of 2 years of active OSH practice.
  • Deployment: Deployed as full-time Safety Officers in Medium to High Risk establishments with larger worker populations.

4. Safety Officer 4 (SO4) / Certified OSH Consultant

  • Qualifications: Completion of 40-hour BOSH/COSH, 80 hours of advanced OSH training, at least 320 hours of OSH practice/consultancy, and formal accreditation as an OSH Consultant by DOLE-BWC.
  • Deployment: High Risk large scale establishments, complex infrastructure projects, and multi-facility industrial conglomerates.

Workplace Risk Classifications

DO 198-18 classifies workplaces into three primary risk categories:

  1. Low Risk Workplaces: Workplaces where employees are exposed to minor hazards, with low probability of injury, such as standard offices, administrative banks, and retail shops without heavy machinery.
  2. Medium Risk Workplaces: Workplaces where work operations generate moderate hazards, requiring routine protective measures, such as light manufacturing, food processing, commercial bakeries, and logistics hubs.
  3. High Risk Workplaces: Workplaces where hazardous operations exist, including exposure to toxic chemicals, heavy construction, underground mining, high-voltage electrical works, maritime dockyards, metal casting, and work at heights above 2 meters.

Safety Officer Staffing Matrix

The mandatory minimum number and qualification level of Safety Officers required per establishment are detailed in the DOLE staffing matrix:

Number of WorkersLow Risk EstablishmentMedium Risk EstablishmentHigh Risk Establishment
1 to 9 workers1 SO11 SO21 SO2
10 to 50 workers1 SO21 SO21 SO3
51 to 99 workers1 SO21 SO21 SO3 + 1 SO2
100 to 199 workers1 SO2 + 1 SO31 SO2 + 1 SO31 SO3 + 1 SO4
200 to 250 workers2 SO2 or 1 SO31 SO2 + 1 SO32 SO3 or 1 SO4
Every additional 250+1 SO2 or +1 SO3+1 SO3+1 SO4 or +1 SO3

Occupational Health (OH) Personnel Requirements

In tandem with Safety Officers, employers must retain qualified Occupational Health personnel (First Aiders, Nurses, Physicians, Dentists) based on workforce size:

  • First Aider: Mandatory for all establishments regardless of size. Must hold a valid Red Cross First Aid certification.
  • OH Nurse: Required part-time or full-time for establishments employing 50 or more workers in High Risk, or 100 or more in Low/Medium Risk.
  • OH Physician: Required part-time or full-time once workforce exceeds 100 workers in High Risk, or 200 workers in Low/Medium Risk.

Core Duties & Operational Responsibilities of Safety Officer 2 (SO2)

A Safety Officer 2 functions as the operational hub of workplace safety implementation. Key duties mandated under Chapter V of DO 198-18 include:

  1. Hazard Identification & Risk Assessment: Regularly inspect the workplace to identify physical, chemical, and ergonomic hazards. Execute HIRAC protocols.
  2. OSH Program Execution: Facilitate the drafting, implementation, and review of the company's written OSH Program.
  3. Conduct 8-Hour Orientation: Deliver mandatory 8-hour worker OSH orientation sessions to all new hires.
  4. HSC Leadership: Actively serve as Secretary to the Health and Safety Committee, preparing agendas, recording minutes, and tracking action items.
  5. Incident Investigation: Conduct formal accident investigations following any injury or near-miss event, preparing WAIR reports for management and DOLE.
  6. Assisting DOLE Inspectors: Serve as primary company escort during routine or special labor inspections conducted by DOLE Labor Inspection Officers.
Test Your Knowledge

What mandatory training course must an individual complete at minimum to qualify as a Safety Officer 2 (SO2) under DO 198-18?

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D
Test Your Knowledge

In a High-Risk workplace employing between 10 to 50 workers, what is the minimum required Safety Officer classification level under DOLE guidelines?

A
B
C
D
Test Your Knowledge

Which of the following is a direct operational duty of a designated Safety Officer 2 (SO2) inside an establishment?

A
B
C
D