Supply Chain Risks: Ensuring OH&S In Vendor Networks

If they cut corners, you wear it. If they violate safety standards, your name is on the line too.

So, what does that mean for you as a Canadian employer?

It means that OH&S compliance doesn’t stop at your front gate. It has to extend all the way down the chain—from your largest vendors to your smallest subcontractors.

And that’s exactly what we’re diving into in this post.

Real Talk: Here’s What It Looks Like When Compliance Falls Apart

These aren’t hypothetical situations. Here’s what we’ve seen in the field:

• A subcontractor delivers chemicals without WHMIS labels or SDS sheets.
• A cleaning crew uses ladders without fall protection inside a commercial property.
• A third-party delivery service blocks emergency exits during a rush shipment.
• A vendor installs equipment without lockout/tagout training, nearly causing an arc flash.

Now ask yourself—would your team catch this before it became a problem? Or would your organization assume the vendor “had it handled”?

Spoiler: assuming is a fast track to fines, injuries, and COR audit failures.

So What Can You Do? Start With These Five Moves

You can’t manage what you don’t track. That’s why proactive businesses build systems that make OH&S expectations clear—and enforceable—throughout the supply chain.

Here’s how to get started.

1. Vet Vendors for OH&S Compliance Upfront

Before signing contracts, ask:

• Do they have a valid WCB account?
• Are they COR/SECOR certified (if required)?
• Can they provide recent OH&S documentation (SDSs, training logs, hazard assessments)?
• Do they have their own safety program?

Don’t rely on verbal assurance. Request proof, and keep it on file.

At Calgary Safety Consultants, we help businesses develop vendor pre-qualification checklists and procurement templates that make safety a requirement—not an afterthought. Explore our workplace safety consulting services.

2. Write Safety Into the Contract

It’s not enough to talk about safety—you have to bake it into the contract.

Include clauses that:

• Require vendors to follow your site-specific OH&S policies
• Grant you the right to remove workers who violate safety rules
• Define who is responsible for inspections, hazard reporting, and incident follow-up

This protects you legally and sets clear expectations from Day One.

We review and help develop contract safety language that aligns with Canadian OH&S law and supports your COR compliance. Learn more about our COR and SECOR certification support.

3. Provide Orientation and Supervision (Even for Contractors)

Anyone entering your site—whether they’re your employee or a temp from a staffing agency—needs orientation. That includes:

• Site hazards
• Emergency procedures
• PPE requirements
• Reporting protocols

A five-minute talk at the gate doesn’t cut it. If something happens, “They weren’t ours” won’t hold up in court.

We build customized contractor orientation packages that can be delivered in person or digitally, depending on your operation. Explore our online safety training.

4. Audit Their Performance Like You Would Your Own

Would you let your own crews skip toolbox talks, or ignore near-miss reporting? Then don’t let your vendors do it either.

Schedule regular:

• Site walkthroughs
• Policy reviews
• Joint inspections

And if a vendor consistently underperforms on safety, hold them accountable—or reconsider the relationship.

We offer joint audit programs that involve both you and your vendors, making it easier to align expectations and uncover hidden risks. Learn more about our contractor prequalification and compliance support.

5. Make Safety Culture a Shared Responsibility

Your vendors reflect your brand.

If you’ve built a safety-first culture internally, but bring in contractors who are rushing jobs, ignoring lockouts, or bypassing PPE, your team gets mixed messages. Eventually, that erodes your culture from the outside in.

Bring vendors into safety meetings when possible. Invite them to participate in incident reviews. Recognize safe performance—just like you would with your own employees.

If you’re serious about culture, it has to be contagious.

Where Most Companies Struggle

The biggest challenges we see?

• Lack of documentation: You assume your vendors have a program, but you’ve never reviewed it.
• No consistency across job sites: One supervisor checks contractor safety plans, the other doesn’t.
• Pushback from vendors: They claim they’re compliant, but refuse to show proof or participate in your audits.
• COR audit gaps: You’re being asked to show how you ensure third-party compliance—and you don’t have the paperwork to back it up.

These gaps aren’t just frustrating. They’re dangerous. And they can knock points off your COR score or get you flagged in a regulatory inspection.

Final Thoughts

Supply chains are partnerships—and in OH&S, that means shared risk. You can’t afford to outsource safety expectations and hope your vendors are doing it right.

Because at the end of the day, when someone shows up to your job site, it’s your name on the sign—and your responsibility to make sure everyone goes home safe.

If you’re ready to tighten up your supply chain compliance, Calgary Safety Consultants is here to guide you! Contact Calgary Safety Consultants for your complimentary consult to explore tailored OH&S solutions that drive real results. 

About the author

John Duplessis, B.Sc., CRSP

President and Principal Health & Safety Consultant

John Duplessis is a Canadian Registered Safety Professional with more than 30 years of occupational health and safety experience in oil and gas, construction, green energy, midstream operations, and industrial project work.

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