CIH (Certified Industrial Hygienist)

The U.S. federal agency that regulates the entry of workers, equipment, and materials across the Canadian-American border, which subcontractors must navigate when mobilising crews or hauling specialised equipment into U.S. job sites. Non-compliance with CBP requirements can result in delays at the border, seized equipment, or crews being turned away, making proper documentation and advance planning critical for cross-border field work.

A formal certification confirming that a vessel, tank, or work area contains no combustible hydrocarbons. Subcontractors typically cannot begin hot work or confined space entry until this status is verified and documented. Operators or third-party inspectors issue the certification, and it must be reconfirmed if conditions change.

A battery-powered respirator that uses a blower to push contaminated air through filters before the worker breathes it. Subcontractors working in refineries, confined spaces, or around hazardous chemicals are often required to supply their own PAPR units. Fit-testing and training records must be maintained to meet occupational health regulations on site.

Electrical switchgear and distribution equipment operating between 1 kV and 35 kV, commonly found on industrial sites and large construction projects. Subcontractors working near or on this equipment typically require specialised high-voltage certifications and site-specific safety training. Improper handling can trigger serious liability and compliance issues for your crew.

The company that directly exposes workers to a hazard on a multi-employer worksite, such as a subcontractor whose crew creates a fall risk. Under Canadian OHS regulations, the exposing employer holds primary responsibility for controlling that hazard. Subcontractors must understand this designation, as it determines who is liable for corrective action.

Indirect losses a party claims resulted from a contractor's failure, such as lost production revenue or project delays. Most subcontracts include a mutual waiver clause excluding these claims entirely. Always confirm this waiver is present before signing any field service agreement.

When a Jobsite Incident Happens: What Field Workers Need to Know Before Signing Anything

What to do after a jobsite injury or incident, what your rights are before signing incident reports, how workers' compensation works, and how to protect yourself on multi-employer worksites.

OSHA Citations on Multi-Employer Worksites: What Subcontractors Need to Know

Learn how OSHA's multi-employer citation policy works, why subcontractors get cited for hazards they didn't create, and how to protect your company on operator-controlled job sites.

How to Read and Negotiate an Oilfield Master Service Agreement (MSA): A Subcontractor's Guide

Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.