Senior HR Generalist - Onsite Irvine, Employee Relations

Masimo; Irvine (CA); On-site; USD 88,000 - 108,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life/AD&D

Disability Insurance

401(k)

Vacation

Sick leave

Paid maternity leave

Flexible Spending Accounts

Voluntary Accident

Critical Illness

Hospital

Long-Term Care

Employee Assistance Program

Pet Insurance

On-site wellness clinic

Fitness center

Cafe

Job summary

Masimo in Irvine, CA is seeking a Senior Human Resources Generalist to support HR Business Partners with a full range of HR services across the employee lifecycle, including employee relations, organizational changes, performance management, engagement initiatives, training, and compliance with employment laws. This onsite role partners with Payroll, Legal, and TA to ensure efficient HR operations.

The role emphasizes autonomy, management of day-to-day HR matters, and serving as a trusted

Qualifications

• 5–8+ years of progressive Human Resources experience.
• Strong employee relations experience, including independently managing investigations and workplace issues.
• Coach and influence managers.
• Solid knowledge of California employment law and HR best practices.
• Ability to operate with autonomy while effectively partnering with HR Business Partners.
• Strong organizational skills with the ability to manage multiple priorities.
• HRIS proficiency (e.g., Workday, Oracle), including transactions, reporting, data audits, and workforce analytics support.
• Proficiency in Microsoft Office Suite (Excel, Word, Outlook, PowerPoint).

Responsibilities

• 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 escalate 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.

Skills

Employee relations

Coaching managers

Autonomy in HR tasks

Cross-functional partnering

HR analytics

Education

Bachelor's degree in HR, Business Administration, or related field

Tools

Workday

Oracle

Microsoft Excel

Job description

Masimo in Irvine, CA is seeking a Senior Human Resources Generalist to support HR Business Partners with a full range of HR services across the employee lifecycle, including employee relations, organizational changes, performance management, engagement initiatives, training, and compliance with employment laws. This onsite role partners with Payroll, Legal, and TA to ensure efficient HR operations.

The role emphasizes autonomy, management of day-to-day HR matters, and serving as a trusted