Senior Human Resources Generalist

JOB DESCRIPTION

The Senior Human Resources Generalist supports HR Business Partners in delivering a full range of HR services within Masimo’s dynamic environment. This position plays a critical role in executing and enhancing core HR processes across the employee lifecycle, including employee relations, organizational changes, performance management, engagement initiatives, training, and compliance with employment laws.

The Senior Human Resources Generalist supports HR Business Partners in delivering a full range of HR services within Masimo’s dynamic environment. This position plays a critical role in executing and enhancing core HR processes across the employee lifecycle, including employee relations, organizational changes, performance management, engagement initiatives, training, and compliance with employment laws.

Acting as a trusted resource to employees and managers, the Senior HR Generalist independently manages employee relations matters and provides guidance on day-to-day HR issues, while partnering closely with HR Business Partners on more complex or strategic initiatives. This role operates with a high level of autonomy within defined scope and serves as a key extension of HR Business Partners in managing day-to-day people matters.

Please note this is an onsite position at our Irvine, CA. office

• Support HR Business Partners in delivering HR services across assigned client groups
• Serve as a primary point of contact for employees and managers, providing guidance on HR policies, procedures, and day-to-day HR matters
• Independently manage employee relations matters, including investigations, performance concerns, corrective actions, and involuntary separations; assess risk, recommend appropriate action, and escalte higher-risk situations as appropriate
• Coach and influence managers on employee matters, including performance management, feedback, documentation, and policy application
• Execute onboarding and offboarding processes, ensuring a compliant, efficient, and positive employee experience
• Manage employee lifecycle changes (e.g., promotions, transfers, organizational updates, compensation changes) with a high level of accuracy and judgment
• Ensure compliance with federal, state (California), and local employment laws and company policies; independently manage workplace accommodations and the interactive process; proactively identify and escalte potential risks
• Partner cross-functionally with Payroll, Talent Acquisition, Legal, and other teams to ensure aligned and efficient HR operations
• Support and drive execution of HR programs, including performance management, engagement initiatives, and training efforts
• Track and analyze trends in employee relations, turnover, and other HR metrics; provide actionable insights and recommendations to HRBPs
• Identify and lead process improvements to enhance efficiency, scalability, and employee experience
• Support HR audits, documentation, and maintenance of employee records to ensure compliance
• Manage unemployment (EDD) claims and workers’ compensation cases, including follow-up and resolution
• Develop and distribution HR communications, tools, and resources for employees and managers
• Lead or contribute to HR projects and initiatives, driving execution and outcomes
• Exercise sound judgment in interpreting policies and making recommendations with minimal oversight

• 5–8+ years of progressive Human Resources experience
• Strong employee relations experience, including independently managing investigations and workplace issues
• Demonstrated ability to coach and influence managers
• Solid knowledge of California employment law and HR best practices
• Ability to operate…