Three infrastructure recruitment PSL myths

For many employers, particularly those operating in complex, skills-dependent sectors like infrastructure, it feels intuitive that expanding a Preferred Supplier List (PSL) will increase access to talent. After all, more agencies mean more candidates, right?

Not quite.

In reality, larger PSLs often deliver lower quality, inconsistent performance and slower hiring, not to mention additional administrative burdens from juggling multiple invoices, timesheets and compliance screening. In comparison, leaner, more focused PSLs consistently outperform larger ones. Let’s break down why the “bigger is better” belief is one of the most damaging myths in recruitment today.

Myth 1: “More suppliers equals more talent.”

Truth: A large PSL dilutes quality, reduces accountability, and slows down delivery.

When we drill down into the details of operating with inflated supplier lists, we know that often employers experience inconsistent processes, scattered communication and reduced service quality. This will only harm both speed and outcomes.

Realistically, most businesses can manage just 3-to-5 suppliers effectively, ensuring quality oversight, better alignment and improved candidate experience. Larger suppliers may have greater resources to manage multiple suppliers, but again, the risk of diluting messages, engagement and managing KPI’s still exists. A bigger PSL doesn’t unlock more talent, it spreads accountability thin and hinders delivery.

Consolidating the supplier base, such as reducing from 35 agencies to a dedicated group that delivers the best value, experiences and results, improves consistency, efficiency, and performance. Managing a smaller group also allows companies to develop closer relationships, access deeper sector knowledge and ensure more effective compliance management in their PSLs.

Myth 2: “A large PSL increases competition and drives suppliers to work harder.”

Truth: Too much competition can drive down engagement and reduce effort.

When suppliers feel they’re one of dozens, motivation can plummet. There is the risk that they will invest less time understanding your business because the chances of success are too small to justify deep effort.

Instead, a lean PSL ensures that suppliers have a meaningful stake in your company, which incentivises them to deliver higher‑quality candidates, move faster and treat your vacancies as a priority.

This echoes the strategic sourcing insight that effective supplier relationships, not volume alone, drive quality and long-term value. Strong, collaborative partnerships reduce total costs, improve reliability and enhance overall supply‑chain performance.

Myth 3: “A broad PSL ensures we cover every specialist need.”

Truth: Large PSLs often fail exactly where specialism matters most.

We know from our own experience that there is a fundamental truth that many businesses inadvertently overlook. While a traditional PSL may successfully deliver around 80% of roles, the remaining 20% (often those which demand rare skills, rapid mobilisation or deep sector expertise) are the ones most likely to expose the limitations of an overstretched supply chain.

This challenge is particularly pronounced in the infrastructure sector, where employers face well-documented shortages of specialist and highly skilled workers across critical disciplines, from high‑voltage engineering to project‑essential operational roles.

At MSSI, we consistently see that meeting these niche demands requires depth, not breadth. A larger PSL may appear to offer choice, but in practice, it often results in diluted accountability, fragmented communication and little coordinated effort to solve the toughest hiring challenges.

In contrast, a focused and well-supported PSL enables richer collaboration, more targeted resourcing strategies, faster mobilisation in high-pressure environments and closer alignment with compliance and safety requirements. These elements are essential in today’s demanding infrastructure landscape. The difficult 20% cannot be solved by simply adding more names to a supplier list; it requires partners who understand the sector and are committed to delivering where others cannot.

Sometimes less is more

The evidence is clear: A large recruitment PSL in infrastructure does not protect you from talent shortages. In fact, it often worsens them by diluting agency performance, slowing processes, and leaving specialist roles unfilled.

A lean, high-quality and tightly managed PSL, supported by specialist partners for niche requirements, delivers:

• Better candidate quality
• Faster results
• Greater consistency
• Improved compliance
• Stronger supplier accountability

When it comes to building your talent supply chain, focus wins, partnerships matter, and quality always beats quantity. If you’d like help refining your own PSL to maximise delivery, MSSI can support you in building a strategy. Contact the team today.