Standards

What Is the SESMT? Everything You Need to Know About NR-4

Safety technician with a clipboard talking to a worker in a safety vest and an occupational physician in a lab coat on a shop floor, with operators working in the background.

Discover what the SESMT is, which companies NR-4 requires to set one up, and which professionals make up this specialised safety service.

By: Vitória Willemann

Preventing accidents and occupational disease takes more than good intentions: it takes technical grounding and daily follow-up. To guarantee that expertise inside the workplace, Brazilian legislation provides for a team dedicated exclusively to protecting employees.

So what exactly is the SESMT?

In this article we explain the concept behind this service, the requirements set by NR-4, and the criteria for knowing whether your company needs to structure such a team internally.

What is the SESMT?

The acronym stands for Serviços Especializados em Segurança e em Medicina do Trabalho — Specialised Occupational Safety and Medicine Services. In practice, the SESMT is a multidisciplinary team of qualified professionals whose main mission is to promote health and protect the physical integrity of workers in the working environment.

They are the technical leads responsible for identifying hazards, assessing risks, implementing control measures (such as PPE and collective protection) and acting directly to reduce work-related accidents and illness.

When it is mandatory, under NR-4

The operation and mandatory nature of this team are regulated by NR-4 (Regulatory Standard 4).

Not every company needs its own SESMT. The standard establishes that sizing the team — whether the company needs the service at all and how many professionals it must hire — depends on two main variables:

  • Risk level of the main activity: classified from 1 to 4, according to the company's National Classification of Economic Activities (CNAE).
  • Total number of employees: the number of active workers at the establishment.

Industries at Risk Level 4 (such as mining or heavy construction), for example, must set up a SESMT from a much lower headcount (from 50 employees). A Risk Level 1 company (office activities, for instance) only becomes subject to this obligation at a considerably higher headcount.

Which professionals make up the SESMT?

To guarantee complete coverage of health and safety, NR-4 determines that the team may be composed of up to five categories of specialist, depending on the sizing required for the company:

ProfessionalRequired qualification
Occupational Safety TechnicianTechnical course in Occupational Safety and professional registration with the Ministry of Labour.
Occupational Safety EngineerEngineer or Architect with a postgraduate degree in Occupational Safety Engineering.
Occupational PhysicianPhysician specialised in Occupational Medicine.
Occupational NurseNurse with a postgraduate degree in Occupational Nursing.
Occupational Nursing Assistant/TechnicianNursing assistant or technician with specific qualification in the occupational field.

The difference between the SESMT and the CIPA

These two acronyms are commonly confused, but they serve different purposes.

While the SESMT is made up of technical professionals hired specifically to work in EHS, the CIPA (Internal Commission for Accident and Harassment Prevention) is a committee formed by the company's own employees — with representatives of both employer and employees — to support prevention on an equal-representation basis. In practice, the CIPA works alongside and under the technical guidance of the Specialised Service.

Managing this technical team's work, controlling reports, health certificates and daily inspections demands modern tools that eliminate paperwork. How does your occupational safety team centralise data and follow EHS indicators today?

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