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The CoSS profession June 17, 2026

The requirements governing CoSS professionals in Quebec

The CoSS role operates within a specific legal framework. This article provides a general overview; always consult official sources for the exact requirements applicable to your worksite.

A framework arising from OHS system modernization

The CoSS is one of the prevention and participation mechanisms specific to construction sites, introduced following the Act to modernize the occupational health and safety regime. These mechanisms structure prevention according to the size and nature of the site.

Defined duties

Contributing to the prevention program, monitoring employer coordination, investigating events and accompanying the CNESST inspector: the CoSS duties are defined by the framework. See the CoSS role.

Required training

Access to the role requires training recognized by the CNESST. See CoSS training and, for legislative context, the overview of Law 27.

Frequently asked questions

Where can official requirements be found?

On the CNESST website, which details the measures applicable to construction sites.

Official sources

CNESST — Specific measures for construction sites.

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This article is part of ACSSQ’s series on the CoSS profession. See the association’s page.

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