Published June 30, 2026 · Kiyansh Group
Large enterprises rarely buy contract talent directly from dozens of staffing firms. They route it through a managed program, and if you want to place people into those accounts, you work inside that structure as a sub-vendor. The model is not complicated once someone draws it plainly, but the details of rate tiers and SLAs decide whether you make money or waste weeks. Here is how it actually runs.
Talk to us about staffing →A Managed Service Provider (MSP) is a company the client hires to run its entire contingent workforce program. The MSP owns the process: it takes hiring requests, decides which vendors get to see them, manages compliance and onboarding, and consolidates billing so the client pays one invoice instead of forty. The MSP works for the client, not for you, and its job is to control cost and reduce risk for the client.
A Vendor Management System (VMS) is the software that runs on top of that program — Fieldglass, Beeline, and similar platforms. Requisitions get posted in the VMS, staffing firms submit candidates through it, timesheets and approvals flow through it, and it enforces the program's rules automatically. If you have ever heard a recruiter say a role is on Fieldglass, that is the VMS.
Together they form the layer between the client's hiring managers and the vendors doing the sourcing. You do not email the hiring manager directly. You respond to a requisition in the VMS, under the MSP's rules, competing against the other approved vendors on that same req.
Not every firm gets a direct seat in the program. The MSP approves a limited tier-one panel of prime vendors, and those primes are allowed to fill roles using their own sub-vendor network. A prime vendor holds the direct contract with the MSP; a sub-vendor holds a contract with the prime and supplies talent through them. Your candidate reaches the client, but the paper trail runs sub to prime to MSP to client.
For a smaller specialist firm, being a sub-vendor is usually the entry point, and it is a legitimate one. You get access to requisitions you could not reach directly, without having to win a direct MSP relationship that often requires scale, insurance thresholds, and a track record the program demands before it will onboard you.
The tradeoff is that you are one layer removed. The prime controls the client relationship and takes a slice of the margin for holding the contract and the risk. Your job as a sub is to be the vendor the prime reaches for first — fast, accurate submittals and candidates who actually get hired and stay.
Start from the bill rate — what the client pays per hour. The MSP takes its program fee off the top, often 2 to 5 percent, before anything reaches vendors. What remains is the rate available to the vendor chain. If a role bills at 100 dollars an hour and the MSP fee is 3 percent, roughly 97 dollars flows down to be split.
The prime vendor takes its margin next for holding the contract and carrying the payment risk — commonly a few points to low double digits, depending on the program and how much the prime actually does. What is left is the sub-vendor's rate: the pool you pay your contractor from and take your own margin out of. As a sub, you are working the thinnest slice of the stack, so your margin discipline has to be tight.
The practical implication is that you cannot win these on price alone from the bottom of the stack — there is not enough room. You win by placing candidates who pass screening the first time, start on schedule, and finish the engagement, because that is what makes the prime and the MSP keep sending you reqs. A cheap submittal that falls out in week three costs everyone above you and gets you dropped.
Programs run on measurable service levels, and vendors are ranked on them. Submittal speed is first — many reqs effectively close within 24 to 48 hours of posting, so a submittal that lands on day three is often too late no matter how good the candidate. Being fast and being right at the same time is the whole game.
Submittal quality is the metric that keeps you in the program. The MSP tracks your submit-to-interview and interview-to-hire ratios. Spraying marginal candidates to look active drags those ratios down and gets you throttled or removed. A sub-vendor with a high hit rate on fewer submittals beats one with volume and noise every time.
After placement, the numbers that matter are start reliability and retention — did your contractor actually start on the agreed date, and did they complete the engagement without early attrition. Compliance and timesheet accuracy round it out; a placement that generates billing disputes or onboarding delays erases the goodwill a good submittal earned. Consistency across all of these is what turns a one-off sub relationship into a steady flow of reqs.
Sometimes, but direct MSP approval usually requires scale, insurance and financial thresholds, and a proven track record that newer or smaller firms have not built yet. Starting as a sub-vendor under an established prime is the normal path in and gives you access to the same requisitions without clearing the direct-approval bar. Many firms run as subs for years by choice because the access is good and the overhead is lower.
It is thin because the MSP fee and the prime's margin both come out before your slice. It is worth it when your volume and your hit rate are high enough to make a modest per-placement margin add up, and when the access opens accounts you could not reach otherwise. Firms that treat the thin margin as a reason to cut corners on candidate quality lose the relationship; firms that run tight and reliable make it work.
Two things: slow submittals that consistently miss the window, and low-quality submittals that drag down interview and hire ratios. After that, it is placements that fall out early or generate compliance and timesheet problems. Programs are ranking vendors continuously on these metrics, so a bad month is visible and a bad quarter usually ends the flow of requisitions.
Kiyansh Group places vetted contract and contract-to-hire IT talent as a sub-vendor to MSP and prime programs — if you need a reliable sub-vendor partner or want into these accounts, let's talk.
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