What is a Sole-Source Supplier?

When a company stops calling five agencies and starts routing every hire through one, it has gone sole source. We first wrote about this arrangement in February 2010, when it was being called the latest trend in recruiting and staffing. Here's how we described it then:

A sole-source supplier allows client companies to coordinate all of their staffing needs through one source. This encompasses direct placements, contract placements, temp-to-direct, temp-to-perm, and more.

That definition still holds up. What has changed is the vocabulary around it. Today a client might say "sole source," "single source," "master vendor," or "we run everything through our MSP," and each of those means something a little different for an independent recruiter trying to get a candidate in front of that client.

Sole Source, Single Source, Master Vendor, and MSP Compared

These terms get used loosely, so it helps to pin down how they're generally used in staffing.

• Sole source: One supplier handles the client's staffing, usually for a defined group of roles or locations, and other suppliers are shut out. The client picked its partner and sticks with it, often without bidding each job out.
• Single source: Frequently used as a synonym for sole source. When people do draw a line, single source means the client chose one supplier even though others could do the work, while sole source implies only one supplier realistically could.
• Master vendor: One primary supplier owns the account and fills what it can. It may pass the rest to secondary suppliers, who then work through the master vendor instead of dealing with the client directly.
• MSP and VMS: A managed service provider (MSP) is a team that runs a client's contingent workforce program and manages many suppliers at once. A vendor management system (VMS) is the software those programs use for requisitions, rate cards, timesheets, and invoicing.

For you, the practical difference is how many doors exist. A sole-source deal may leave a single door, held by someone else. An MSP program can open a lot of doors, but plenty of other suppliers will be crowding through them too. Our guide to partnering with MSPs covers what life inside those programs looks like.

Why Clients Choose One Supplier, and What It Costs Them

Clients like sole-source arrangements for reasons that are easy to understand. One contract, one invoice, and one point of contact cut down on purchasing work. A supplier that sees every requisition learns the client's culture and hiring managers quickly, and the client usually gets more leverage on rates when all of its volume flows to one place.

But putting everything with one supplier has a downside. If that supplier struggles with a niche skill set or a sudden spike in demand, there's no bench of other suppliers to call. Rates can creep up once competition disappears, and hard-to-fill roles can sit open longer while the one supplier is stretched thin. Those gaps are where an independent recruiter with a specialty can often get in.

How Independent Recruiters Can Still Work With Sole-Source Programs

A locked front door still leaves other ways into the account. Here are a few approaches worth trying:

• Partner with the incumbent. Sole-source and master vendor suppliers sometimes subcontract roles they can't fill. If you own a niche, such as a specific IT stack or an allied health specialty, offer the incumbent your candidates on a split or subcontract basis.
• Find the exceptions. Supplier agreements often carve out certain roles, departments, or locations. Ask which job categories fall outside the agreement and when it comes up for renewal.
• Stay close for the rebid. Sole-source contracts don't last forever. Hiring managers who've been frustrated by slow fills tend to remember the recruiter who kept in touch.
• Be ready for compliance requirements. Programs that consolidate suppliers usually expect each one to carry proper insurance, run compliant onboarding, and employ its contract workers correctly.

You don't have to build that last piece yourself. As an Employer of Record (EOR), FoxHire becomes the W-2 employer of your contract workers and handles payroll, taxes, workers' compensation, onboarding, and compliance in all 50 states, and we provide a Certificate of Insurance when a client asks for one. You keep the client relationship and the placement. For a closer look at how an EOR sits alongside supplier programs, see what an Employer of Record and a VMS each handle.

The Takeaway

Clients have been consolidating suppliers since at least 2010, when we first wrote about it. So the next time a prospect tells you "we only use one vendor," ask who that vendor is, which roles they struggle to fill, and when the contract renews. One of those answers is often your opening.