Author: Owen Miles, VP Solutions Engineering EMEA at Restrata
Author Bio: Owen Miles brings 20+ years of experience in operational resilience and has been instrumental in helping 800+ companies implement and realise the value of resilience solutions.
Blog Series: ‘Miles to Go’ – Exploring the foundations of resilience & continuity
#21 – Third-Party Resilience: Extending Your Risk Perimeter
Date: 28 Jan 2026
Third-Party Resilience: Extending Your Risk Perimeter
Resilience doesn’t stop at your firewall, your front door, or your org chart. It extends into your supply chain, your vendors, your partners—and every third party you rely on to deliver critical services.
I’ve worked with organizations that had strong internal resilience—but were blindsided by a disruption in a vendor, a logistics partner, or a cloud provider. The result? Downtime, confusion, and reputational damage. Not because they weren’t ready—but because someone else wasn’t.
The most resilient organizations I’ve worked with treat third-party resilience as part of their own strategy. Because if your partners fail, you fail.
1. Dependencies Are Everywhere
Modern operations are interconnected. You rely on external providers for data, infrastructure, transport, communications, and more. And many of those dependencies are invisible until something breaks.
I’ve seen organizations discover critical single points of failure only after a disruption. A vendor with no backup. A partner with no escalation plan. A service with no redundancy. These aren’t edge cases—they’re common.
2. Resilience Must Be Assessed, Not Assumed
Just because a vendor is reputable doesn’t mean they’re resilient. I’ve reviewed contracts that mention SLAs, uptime guarantees, and compliance—but say nothing about continuity, crisis response, or recovery.
Resilient organizations go deeper. They ask:
- Do you have a tested continuity plan?
- How do you escalate issues?
- What’s your recovery time—and how is it verified?
- Who owns resilience in your organization?
They don’t just trust—they validate.
3. Regulation Is Raising the Bar
In regulated industries, third-party resilience is no longer optional. Financial services, for example, must demonstrate that their critical services can withstand disruption—even when delivered by external providers.
That means mapping dependencies, testing scenarios, and building redundancy. It also means holding vendors accountable—not just for performance, but for preparedness.
4. Resilience Is a Shared Responsibility
I’ve seen the best results when organizations treat vendors as partners—not just providers. They share expectations. They run joint simulations. They align on communication protocols. And they build trust—so when disruption hits, coordination is fast and confident.
Because resilience isn’t built in isolation. It’s built in collaboration.
Call to Action: Audit your third-party relationships. Are they resilient, tested, and aligned with your continuity strategy? If not, start the conversation—and extend your resilience perimeter.
Next Week: We’ll explore how scenario planning helps organizations prepare for the unexpected—and why imagination is one of the most underrated resilience tools.