Senior Manager, HR M&A Integration

About the CompanyOur client is a leading financial services platform supporting independent wealth management firms across the United States. The organization provides technology, operations, compliance, and business support that enable advisory firms to scale efficiently while maintaining strong client service and regulatory standards.Through an active acquisition strategy, the business completes multiple transactions each year and integrates newly acquired firms into its operating platform. This creates a fast-paced, high-volume M&A environment where HR integration is critical to ensuring seamless employee transitions, accurate data migration, and a consistent Day 1 experience.About the RoleWe are seeking a Senior Manager, HR M&A Integration to lead HR integration activity across a high-volume acquisition environment within wealth management. This role partners closely with M&A, HR, Payroll, Benefits, Legal, Technology, and business stakeholders to ensure smooth, compliant, and employee-focused transitions. The role owns HR due diligence, Day 1 readiness, onboarding, and post-close integration across multiple acquisitions each year, while improving integration frameworks and governance.Key ResponsibilitiesLead HR workstreams across M&A transactions, including due diligence, Day 1 readiness, onboarding, and post-close integrationPartner with M&A and business leaders to align on timelines, workforce risks, communications, and escalation pathsConduct HR due diligence, identifying workforce, compliance, and organizational risks and providing recommendationsManage employee data collection, validation, and onboarding setup across HRIS, Payroll, and BenefitsCoordinate employment agreements and offer documentation with Recruiting and LegalEnsure accurate payroll, benefits enrollment, and HR system setup for acquired employeesDesign and execute Day 1 onboarding communications and employee experienceBuild and manage Day 1–Day 100 integration plans, tracking milestones, dependencies, and issuesProvide leadership updates on progress, risks, and key decisionsDevelop and improve HR M&A playbooks, templates, and governance toolsSupport post-close stabilization and transition into ongoing HR operations and HRBP supportQualifications7+ years HR experience, ideally with HR Business Partner and broad HR generalist exposureExperience supporting M&A or complex organizational change initiativesStrong cross-functional stakeholder management across HR, Payroll, Benefits, Legal, and M&A teamsComfortable working with employee data, HRIS/payroll systems, and Excel-based tracking and reconciliationStrong communication skills with ability to drive alignment and execution in fast-paced environments