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Becoming a supplier

We use controls to make sure we select and appoint the best suppliers who are both responsible and capable of delivering our business needs.

So we can maintain the right calibre of suppliers within our supply chain and strategic relationships, potential suppliers for Costain must take one of two assessment routes.

  • Externally, via an Achilles accreditation scheme (Building Confidence is our preferred option, alternatively UVDB, FPAL or RISQS)
  • Internally, via the Costain materials, plant or subcontract questionnaire.

We categorise suppliers as Verified, Preferred or Strategic Partners within our procurement database. All Preferred and Strategic Partners must be Achilles accredited in one of the later Achilles schemes.

If your company would like to be considered for inclusion on our supply chain, the first step is to register using our Supplier Self Registration form.

Please note that if you have been invited by a project/sponsor to complete the onboarding questionnaire, DO NOT USE THIS LINK.

The project/sponsor is required to raise an internal approval request which will automatically send you an email link for the onboarding questionnaire once you have been approved. Please refer back to them otherwise any order to you may be delayed.

Note that completing this questionnaire does not automatically mean you will receive orders from Costain.