Your supply chain risk no longer stops at Tier 1.
See beyond Tier 1. Identify material risks earlier. Build the evidence to show how your supply chain is being managed, and act before hidden risk becomes commercial exposure.


Built for principal contractors managing multi-tier supply chains.
Changes to CIS fraud rules and upcoming Right to Work requirements have increased the consequences of poor visibility through complex construction supply chains. Supply Chain Assurance connects contractor relationships, worker–employer relationships and project activity, helping principal contractors understand how work is being delivered through the lower tiers before an issue becomes an investigation, disruption or financial exposure.
See the supply chain that is actually delivering your project.
Supply Chain Assurance creates a project-level view of the organisations, employers and workers involved in delivery.
Instead of every supplier appearing as though it sits directly beneath the principal contractor, MSite maps the actual hierarchy, from Tier 1 through Tier 2, Tier 3 and beyond, showing who engaged whom and connecting those relationships to the workforce attending site. This makes it easier to understand the difference between the supply chain you expected to use and the supply chain that is actually delivering the project.


Want a clearer view of your supply chain?
See how MSite Supply Chain Assurance can help you understand contractor relationships, connect workers to their employers and identify where further assurance is needed.
Know the risk before it reaches your project, balance sheet, or reputation
Principal contractors know their Tier 1 subcontractors. The challenge is seeing what happens below them. Supply Chain Assurance reveals the wider contractor and worker relationships, helping teams spot risk earlier and retain the evidence behind their decisions.
Reduce financial exposure
Identify potentially higher-risk relationships earlier and create evidence of the checks, reviews and actions taken before an issue escalates.
Protect project delivery
See lower-tier dependencies, unexpected organisations and sole-supplier relationships that could create disruption if something goes wrong.
See beyond tier 1
Understand who is actually delivering the work, who appointed them and how far the contractor hierarchy extends.
Protect reputation and cliient confidence
Demonstrate that your business is actively monitoring how work and labour are being delivered rather than relying solely on declarations from Tier 1 suppliers.
Strengthen audit readiness
Create a connected, timestamped project record of contractor relationships, employer relationships, exceptions and actions, reducing the need to reconstruct the supply chain retrospectively.
Identify risk earlier
Surface unverified, unexpected or flagged organisations so teams can focus attention where it matters most.
Built for the teams responsible for supply chain risk
Commercial and procurement
See how deeply work is subcontracted, identify lower-tier dependencies and make assurance part of commercial decision-making.
Supply chain
Understand who is working beneath each appointed subcontractor, improve lower-tier oversight and concentrate due diligence on material exceptions.
Legal, compliance and risk
Access connected evidence of contractor relationships, employer relationships, verification status, exceptions and actions.
Finance and tax
Improve visibility of the organisations connected with project labour and support investigation of potentially higher-risk relationships.
Operations and project teams
Identify who is responsible for a worker or supplier quickly and gain earlier visibility when new organisations enter the delivery chain.
HSEQ and workforce teams
Connect workforce activity with the organisation responsible for the individual and strengthen investigation of worker-related issues.
This is a headlineExecutive leadership
Gain a clearer view of project and enterprise supply chain exposure and stronger evidence that material risks are being actively monitored.
FAQs
MSite Supply Chain Assurance helps Principal Contractors understand, monitor and evidence how work and labour are being delivered through the different tiers of their construction supply chain.
It connects the contractor hierarchy, worker-employer relationships, contractor assurance information and live workforce activity in a project-level view.
Principal Contractors often have strong visibility of the Tier 1 subcontractors they appoint directly, but considerably less visibility of the organisations operating further down the supply chain.
Supply Chain Assurance helps make those lower-tier relationships visible and connects them with the workers actually attending the project.
Yes.
The project hierarchy can show Tier 1, Tier 2, Tier 3 and lower-tier subcontractors and labour providers according to who engaged them.
This makes it possible to understand how work is being subcontracted beyond the Principal Contractor’s direct commercial relationships.
Yes.
The hierarchy is project specific. An organisation might be a Tier 1 contractor on one project but sit at a lower tier on another depending on the contractual relationship for that project.
Supply Chain Assurance links workers to the organisation recorded as employing or directly engaging them and connects that organisation to the wider project hierarchy.
This helps teams understand responsibility for the worker without having to reconstruct the relationship from multiple systems.
No.
Supply Chain Assurance does not remove supply chain risk or guarantee legal or regulatory compliance.
It helps Principal Contractors improve visibility, identify material exceptions, operate proportionate assurance processes and retain evidence of the actions taken.
The Supply Chain Assurance model is designed to help teams focus on material exceptions such as unverified, unexpected or previously flagged organisations, employer-related issues and sole-supplier dependencies.
This supports a management-by-exception approach rather than requiring teams to review every organisation in the same way.
No.
Contractor users can see their own position within the project hierarchy, including their parent contractor and organisations beneath them, but their access to other contractor records is restricted.
This provides enough visibility to participate in maintaining the hierarchy without exposing unrelated commercial information.
Supply Chain Assurance serves a different purpose.
A general supplier database may tell you which organisations the business knows about. Supply Chain Assurance is focused on the live project delivery chain, which organisations are involved on a specific project, how they relate to each other and which workers are connected to them.
Yes.
Supply Chain Assurance is site scoped and can be enabled on an individual project, making it possible to pilot the approach before considering a wider enterprise rollout.
A pilot can be used to test responsibilities, contractor engagement, governance processes and the quality of the resulting hierarchy.
Latest insights on Supply Chain Assurance

Supply chain management software: is construction asking enough of its technology?
Procurement systems contain supplier information. Commercial teams hold contractual records. Project teams know which subcontractors they've engaged. Workforce systems can tell you who is attending site.But can those systems collectively answer a more difficult question

Construction supply chain risk: the risks hidden below Tier 1
Principal contractors tend to know their Tier 1 subcontractors well. They have been through procurement, contracts have been agreed and due diligence completed.But Tier 1 is only the beginning of the delivery chain.

What is supply chain assurance in construction?
Most principal contractors can tell you which companies they've appointed to deliver a project. Far fewer can confidently explain who those companies have engaged, how work is flowing through the contractor hierarchy, or whether the organisations working on site today are the ones they expected.