Payroll Implementation Specialist — Multi-State & Global

GreenLight.ai; United States; On-site; USD 83,000 - 124,000; Full time

Job summary

GreenLight.ai is seeking a Payroll Implementation Support Specialist to drive the rollout of a new payroll provider. You will partner with Payroll, HR, Finance, Engineering/Product, and vendors to plan, migrate data, validate configurations, coordinate integrations, test, cutover, and stabilize post-launch.

The role requires hands-on experience with complex payroll implementations, multi-state U.S. payroll, and high-volume hourly payroll, with strong Excel and communication skills.

Qualifications

• 5–8+ years of experience in payroll operations, payroll systems, payroll implementation, or payroll implementation support.
• Hands‑on involvement in at least one complex payroll system or payroll provider implementation.
• Strong understanding of complex payroll environments, including U.S. multi‑state payroll.
• Experience with high‑volume hourly payroll, variable pay, frequent worker changes, payroll cutoffs, exceptions, and reconciliation.
• Experience supporting data validation, payroll reconciliation, parallel payroll testing, and issue resolution.
• Ability to coordinate cross‑functional workstreams across payroll, HR, finance, engineering/product, vendors, and implementation partners.
• Comfortable working with technical teams on integrations, data flows, field mapping, testing, and issue tracking.
• Strong Excel skills and ability to analyze large datasets and identify discrepancies.
• Strong communication, documentation, and project coordination skills.
• Availability for a 3–5 month contract.

Responsibilities

• Support the payroll implementation project plan, including workstream tracking, milestone management, dependency tracking, issue/risk logs, and status updates.
• Coordinate across Payroll, HR, Finance, Engineering/Product, the selected payroll provider, and any implementation partners to keep workstreams moving.
• Support requirements validation, payroll process documentation, system readiness, and operational handoff planning.
• Assist with payroll data migration, mapping, cleansing, validation, and reconciliation.
• Support validation of payroll configurations, including earnings and deduction codes, tax setup, payroll calendars, worker setup, and payroll processing rules.
• Coordinate with Engineering/Product and vendor technical teams on the integration between GreenLight’s platform and the payroll provider.
• Support validation of key data flows between GreenLight’s platform and the payroll provider, including worker records, payroll inputs, payroll results, tax/deduction data, payment status, and reporting outputs.
• Support user acceptance testing, integration testing, and parallel payroll testing.
• Investigate discrepancies during testing, document root causes, and track issues through resolution.
• Support cutover planning, go-live readiness, payroll calendar alignment, and post-implementation stabilization.
• Develop process documentation, testing materials, cutover checklists, job aids, and knowledge transfer materials for ongoing payroll operations.
• Provide hands‑on support during hypercare for the first payroll cycles after go‑live.

Skills

Payroll operations

Cross-functional coordination

Excel

Data validation

Project coordination

Communication

Testing

API integrations

Tools

APIs

Job description

GreenLight.ai is seeking a Payroll Implementation Support Specialist to drive the rollout of a new payroll provider. You will partner with Payroll, HR, Finance, Engineering/Product, and vendors to plan, migrate data, validate configurations, coordinate integrations, test, cutover, and stabilize post-launch.

The role requires hands-on experience with complex payroll implementations, multi-state U.S. payroll, and high-volume hourly payroll, with strong Excel and communication skills.