When a 300-person company starts implementing a new HR system, they typically have one or two HR generalists who have never done an implementation before, working against a vendor team that rotates specialists, gives inconsistent answers, and tracks nothing in a shared space the client can see. Reviewers described the experience as 'figure it out yourself' and 'a complete disaster I'm still sorting out four months later.' The company paid a significant software contract assuming the vendor would guide them. The vendor's implementation team assumes the client will fill gaps.
The reason this gap persists is structural: the vendor's implementation team is compensated on throughput — getting clients to go-live — not on outcome quality. An experienced, client-side implementation manager who knows both the HR domain and the specific software would catch inconsistencies early, push back on vendor timelines, and own the data migration checklist. But hiring a full-time HRIS specialist for a six-month project is expensive and hard to justify when the implementation is supposedly the vendor's job.
Independent HR implementation consultants exist, but they're a fragmented freelance market with no standard methodology and no accountability structure a mid-market buyer can rely on. There's no equivalent of a managed implementation service that bundles a named project manager, a documented process, and a financial stake in hitting the go-live date.
This is a business because the problem recurs every time a company upgrades or switches HR systems, and the financial stakes are real: a delayed implementation means parallel-running two systems, paying two sets of fees, and burning HR staff time on reconciliation instead of their actual jobs. Companies will pay to have someone else carry that risk.
What to build
Build a fixed-fee managed implementation service for ADP Workforce Now and similar platforms where a named project manager — who has completed at least ten prior implementations of that specific product — owns the client-side checklist, attends every vendor call, resolves conflicting instructions in writing, and guarantees a go-live date or refunds a portion of the fee.
Where to start
Target government entities and nonprofits first — the complaints specifically call out government-specific nuances like 457b plans being botched by inexperienced vendor teams, and these organizations have procurement cycles that reward a credentialed, documented methodology over a cheaper generalist.
The hard part
Recruiting and retaining project managers with genuine depth in specific HR platforms is hard because the people who have that knowledge are usually employed full-time at the vendors or at large consulting firms — so the quality of your first ten engagements depends almost entirely on who you hire first.
How it makes money
Fixed project fee based on employee headcount and number of modules, typically $8,000–$25,000 per implementation engagement, with an optional six-month post-go-live support retainer at a flat monthly rate.
See the evidence. The complaints behind this idea, the products they came from, and similar ideas in Core HR.
More ideas in Core HR