Background Screening in Construction and Engineering: Why Workforce Assurance Is Becoming a Condition of Delivery

The UK has set out its most ambitious infrastructure programme in a generation. The Government’s 10 Year Infrastructure Strategy, published last year, commits £725 billion of investment over the next decade, with a pipeline of hundreds of major projects across transport, energy, water, defence and social infrastructure now overseen by the National Infrastructure and Service Transformation Authority (NISTA).

Delivering that programme depends on people. The CITB’s Construction Workforce Outlook estimates that the industry will need an average of 41,200 extra workers each year between 2026 and 2030 – around 206,000 over the five-year period – to meet forecast demand and replace those leaving the industry. The sector will need to recruit at pace, across every tier of its supply chains, at precisely the moment scrutiny of who is working on its projects has intensified.

For construction and engineering organisations, workforce integrity now sits alongside health and safety, competence and quality as a condition of delivery. Background screening – once treated as a recruitment formality – is increasingly tied to site access, contractual compliance and, on a growing proportion of projects, national security considerations.

A sector moving towards formal regulation

Construction has not historically been regulated in the way that financial services or energy are. That position is changing. In January 2026, the Building Safety Regulator became a standalone body, described by the UK Government as a landmark step towards the single construction regulator recommended by the Grenfell Tower Inquiry’s Phase 2 report. Its stated focus is the promotion of competence and higher standards across the industry.

Organisations will increasingly be expected to demonstrate not only that their buildings are safe, but that the people designing, constructing and maintaining them are competent, verified and accounted for. The Building Safety Act has already established dutyholder obligations around competence and record-keeping, and those expectations are steadily flowing down through contracts and prequalification into everyday procurement.

For engineering firms, the picture is sharpened by where the work sits. A significant share of engineering activity now takes place on or around critical national infrastructure – energy, water, rail, aviation, defence and nuclear – where National Protective Security Authority guidance on personnel security applies, and where BPSS or BS7858 screening is frequently a condition of contract rather than a discretionary control.

Screening is moving closer to operations

Background screening was once seen primarily as part of recruitment, completed before an offer was confirmed and rarely revisited afterwards. In project-led environments, that model no longer reflects how the work gets done.

In many construction and engineering businesses, screening now directly affects site access, contractor onboarding and project mobilisation. Where access is controlled and programme milestones are fixed, delays in screening can hold up delivery – and across a full subcontractor intake, rather than a single appointment, the cost of an unclear process quickly becomes an operational issue rather than an administrative one.

Responsibility has shifted accordingly. Project directors, site managers and mobilisation teams now carry screening obligations that once sat with HR alone, often without systems designed to manage them at the volumes a major programme requires.

Expectations are tightening, often without announcement

There has been no single rule change forcing the issue and expectations have instead tightened gradually, through contract requirements, prequalification questionnaires, audits and legislation. BPSS Version 7.0, published by the UK Government, introduced more explicit requirements around employment history verification, digital identity and data handling for those working on government-linked projects.

Right to Work enforcement has also sharpened, with civil penalties now reaching up to £45,000 per worker for a first breach and £60,000 for a repeat breach, and in an industry built on subcontracting and short engagements, that exposure accumulates across the supply chain rather than sitting with any single employer.

Organisations operating across the UK must also navigate three separate criminal records regimes – DBS checks in England and Wales, the PVG scheme in Scotland and AccessNI in Northern Ireland – applied proportionately to the role and the environment in which the work takes place.
None of these requirements is unmanageable in isolation. Applied together, across a workforce made up of direct employees, agency labour and several tiers of subcontractors, they are steadily raising the standard that organisations are expected to meet – and to evidence.

Where pressure is building

In practice, the same patterns appear across most construction and engineering organisations.

Screening standards can vary between employees, agency workers and subcontractors, particularly where each client or main contractor specifies slightly different requirements and evidence is recorded in different ways by different teams. Where screening is delegated to agencies or suppliers, the standard applied is often assumed rather than specified, and can be difficult to evidence when challenged.

Employment histories in the sector are naturally fragmented, with short contracts, multiple projects and a mobile workforce making gaps harder to follow up and easier to leave unverified. While documentation often sits across email chains, spreadsheets and local systems rather than in a single auditable record.

None of these issues are unusual, and none amount to negligence. They are a consequence of growth, subcontracting and operational pressure. They do, however, create exposure – particularly when organisations are asked to demonstrate, at prequalification or under audit, that their processes are consistent and defensible.

What the most effective organisations are doing differently

Organisations that are managing this well are not necessarily doing more checks. They are applying them more consistently, earlier in the process, and with greater oversight.

Screening is treated as part of mobilisation planning from contract award, rather than handled separately once programmes are already under pressure. A single standard is defined and flowed down through every tier of the supply chain, with documentary evidence required rather than assumed. Individuals complete as much of the process as possible digitally, before arriving on site, which reduces the administrative burden on site and HR teams and avoids delays at the point of access.

Just as importantly, documentation is centralised and accessible, so that every check can be evidenced and every decision explained – whether the question comes from a client, an auditor or a regulator.

The result is not only compliance, but confidence that the process will hold up under programme pressure and under scrutiny.

Questions organisations should be asking now

For many, the starting point is a structured review of existing processes.

• Are screening standards applied consistently across employees, agency workers and every tier of subcontractors?
• Is there a single, auditable record showing how each individual on site was cleared to work?
• Where work touches critical national infrastructure or government contracts, are BPSS and BS7858 obligations clearly owned and evidenced?
• Do current processes support the pace of mobilisation the business requires?

These are the questions increasingly being asked during prequalification, client audits and internal assurance reviews.

How CBS supports construction and engineering

We work with contractors, infrastructure providers and engineering firms operating in high-accountability environments – including organisations delivering on regulated estates and security-sensitive programmes – where screening needs to be efficient as well as robust.

We process more than one million background checks each year and are ISO 27001 and ISO 9001 certified. We combine secure digital workflows with a team of experienced screening specialists, helping organisations apply a consistent standard across their workforce and supply chain, from criminal checks and verification checks to BPSS security clearance and BPSS security screening on government-linked projects – and evidence it clearly when required.

If you are reviewing how screening is managed across your projects, speak to our expert team about screening in project-led and security-sensitive environments.