Choosing the Right for MSP Delivery Model Your Critical Infrastructure Projects

BLOGBy Rullion on 13 August 2025

In critical infrastructure, workforce planning can be tied to regulatory investment cycles, major infrastructure upgrades, or unplanned maintenance. For many organisations, a Managed Service Programme (MSP) provider can help ensure the right skills are in place when needed, avoiding delays that can add months and millions to a project. Choosing the right MSP delivery model can be the difference between hitting deadlines and facing costly overruns.

Why the MSP delivery model matters

Your MSP delivery model shapes:

Speed – how quickly roles are filled
Quality – how well candidates match your requirements
Access to talent – how broad or targeted your sourcing is
Supplier relationships – how performance is managed
Compliance and control – how you meet sector-specific regulations

Two of the most widely used MSP vendor models are Master Vendor and Neutral Vendor. Some organisations also use Hybrid approaches. The right choice depends on your skill mix, supply chain maturity, and delivery priorities.

Where MSP delivery models overlap

No matter which model you choose, your MSP provider should still:

Manage the end-to-end process for recruiting and managing contingent workers
Act as a single point of contact for hiring managers and procurement
Oversee supplier performance, contracts, and regulatory compliance
Provide clear reporting, insight, and market intelligence
Drive cost control, risk management, and continuous improvement

What’s the difference between Master Vendor and Neutral Vendor?

The key difference lies in candidate sourcing and supplier prioritisation:

Master Vendor: in-scope roles start with the primary supplier’s own network before engaging others
Neutral Vendor: opens every role to the full supplier network from day one

Master Vendor MSP

In a Master Vendor model, your MSP service provider is led by a single primary supplier who fills most requirements (between 60-90%) from their own talent network. When they can’t fill a role, it’s passed to a small group of approved third-party suppliers.

When does a Master Vendor MSP works best?

High volume of similar roles with quick turnaround times
Predictable, repeat skillsets that benefit from direct fulfilment
When your primary supplier has deep expertise of your sector and is able to deliver direct fulfilment on in-scope roles

Example: A utilities contractor ramping up for a national smart meter installation programme or an energy provider hiring engineers for planned maintenance.

Advantages of a Master Vendor model:

Faster fulfilment for repeat roles
Consistent quality from a supplier that knows your business
Streamlined supplier management

Risks to manage with a Master Vendor model:

Success relies heavily on the strength and sector expertise of the primary supplier’s own network.
While a Master Vendor will still work with trusted third-party suppliers for specialist roles, access to ultra-rare or emerging skill sets may still be more limited than in a Neutral Vendor model.

Neutral Vendor MSP

In a Neutral Vendor model, your MSP service provider acts as an impartial manager. Still overseeing all supplier relationships, enforcing performance standards, and ensuring compliance, but without prioritising its own candidates. All approved suppliers get the same opportunity to submit candidates for each role, creating a level playing field.

When does a Neutral Vendor MSP works best?

Roles require niche, scarce, or highly specialised skills
Broader supplier reach is needed for complex projects

Example: A nuclear operator hiring safety case engineers, or a water company recruiting hydrologists and digital infrastructure experts.

Advantages of a Neutral Vendor model:

Greater reach into niche skill markets
Competitive sourcing that can balance speed, cost, and quality
Less reliance on a single supplier

Risks to manage with a Neutral Vendor model:

Potentially slower fulfilment if processes aren’t tightly managed
More complex supplier relationship management

Hybrid MSP models

A Hybrid MSP delivery model blends elements of Master Vendor and Neutral Vendor models to create a more flexible delivery approach. It’s designed to give you the speed and simplicity of direct fulfilment for common roles, while also tapping into a wider supplier network for specialist needs.

When does a hybrid MSP vendor model work best?

You have a core set of high-volume, repeat roles alongside niche, low-volume requirements.
Supply chain maturity varies. Some skill areas are well covered; others need broader reach.
Project demand is uneven, with peaks for specific skill sets at certain times.

How a hybrid model works in practice:

Master Vendor mode for operational or technical roles where the primary MSP supplier already has strong talent pipelines.
Neutral Vendor mode for specialist, rare, or project-specific skills where a wider net is needed.

Example: A national energy provider may use a Master Vendor approach for meter engineers, field service technicians, and project managers but switch to Neutral Vendor sourcing for cybersecurity experts or nuclear safety specialists.

Advantages of a hybrid MSP model:

You get the best of both worlds. Fast fulfilment for common roles, wide access for niche needs.
Tailored sourcing strategy for each skill area.
Can evolve over time as project needs change.

Risks to manage with a hybrid model:

Requires clear governance and role categorisation so suppliers know when each model applies.
More complex performance tracking to ensure both streams are delivering against targets.

Master Vendor MSP vs. Neutral Vendor MSP

Considerations	Master Vendor Model	Neutral Vendor Model
Speed	Faster fulfilment for repeat skills	Dependent on supplier responsiveness
Access to niche skills	Relies on primary supplier’s expertise for in-scope roles and escalation to approved suppliers	Immediate access to full approved supplier network
Supplier relationship management	One dedicated MSP contact managing a smaller, focused supplier group	One dedicated MSP contact managing a broader supplier network, ensuring performance, compliance, and consistency across all vendors
Cost control	Strong for repeat hires	Competitive supplier engagement may reduce agency rates
Risk	Over-reliance on one supplier	Possible slower time-to-fill if not managed well

Choosing the right MSP model and provider

The right MSP delivery model will depend on your current skills mix, supply chain maturity, and delivery priorities. But it shouldn’t stay static; if it does, it could be time to change your MSP provider.

Rullion’s MSP model helps organisations evolve their approach over time. Whether that means starting with a Master Vendor model for speed and control, moving toward a Neutral Vendor model to widen reach, or blending the two in a hybrid model. Whatever your challenges, we’ll design and manage a model that supports your projects, meets your regulatory commitments, and strengthens your long-term workforce strategy.

With our deep sector expertise and enhanced internal capability, we’re able to achieve industry-leading direct fulfilment rates for our clients, delivering around 90% of roles directly through Master Vendor or hybrid arrangements. For the few highly specialised requirements that fall outside this, we draw on our trusted, vetted supplier network to ensure every role is filled with the right talent.

Quick Checklist

When it comes to picking the right MSP delivery model, you’ll want to ask yourself:

Do we have a high volume of repeat roles or a wide mix of niche skills?
How mature and capable is our current supply chain?
Is speed or breadth of access our higher priority?
How important is competitive supplier engagement to our hiring strategy?
Are we prepared for the governance needed to manage multiple suppliers?

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