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.