Global Payroll Implementation Lead (Contract)

Blackhornvc; United States; On-site; USD 100,000 - 140,000; Full time

Job summary

GreenLight.ai is seeking a Payroll Implementation Support Specialist to drive the implementation of our new payroll provider across a multi-state US and international environment. The role sits at the intersection of payroll operations, data validation, testing, and system integration coordination.

You will coordinate with payroll, HR, finance, engineering/product, and vendor teams to support implementation planning, data migration, configuration validation, integration coordination, testing,

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

Excel proficiency

Cross-functional coordination

Project coordination

Data analysis

Tools

API integrations

Payroll systems

Job description

GreenLight.ai is seeking a Payroll Implementation Support Specialist to drive the implementation of our new payroll provider across a multi-state US and international environment. The role sits at the intersection of payroll operations, data validation, testing, and system integration coordination.

You will coordinate with payroll, HR, finance, engineering/product, and vendor teams to support implementation planning, data migration, configuration validation, integration coordination, testing,