About the Role Our client is looking for an experienced M&A Integration/HR Project Manager to support acquisition activity, with a focus on payroll, benefits, and 401(k) integration. Your time will go primarily to active M&A projects. When there is no active deal, you will support other initiatives across the company, mainly in payroll, benefits, and HCM change projects. What You'll Do M&A Integration (primary focus) • Support the integration of acquired companies' payroll, benefits, and 401(k) plans • Consolidate employee, payroll, and benefits data from acquired entities into a single view • Coordinate with HR, payroll, finance, benefits carriers, 401(k) providers, and the acquired company's teams to keep integration timelines on track • Review and verify data for accuracy before and after conversion, using Excel-based reconciliations and validation checks • Identify discrepancies, track them to resolution, and document findings • Help maintain integration checklists, trackers, and status updates Payroll, Benefits & HCM Projects (when M&A work is light) • Support payroll and benefits process improvements and system changes • Assist with HCM system updates, configuration changes, testing, and rollouts • Help with audits, data clean-up, and other special projects as needed What You Bring Required • Hands-on M&A integration experience, ideally on the HR, payroll, or benefits side • 401(k) integration experience (plan mergers, data transfers, provider transitions, or similar). • Experience integrating payroll and benefits programs • Advanced Excel skills (lookups, pivot tables, data comparison, and large-dataset handling) • Proven ability to consolidate, coordinate, review, and verify data across multiple sources • Strong attention to detail and a habit of double-checking your work • Clear communicator who can work with multiple stakeholders and keep projects moving • Ability to work independently and manage your own time in a part-time role Preferred • Experience with HCM platforms (e.g., Workday, UKG, ADP, Paylocity, or similar) • Background in HR operations, payroll, benefits administration, or HR consulting • Familiarity with compliance considerations in benefits and retirement plans