Sr. Manager, Benefits

Position Summary:

The Sr. Manager, Benefits is responsible for design, administration, compliance, financial stewardship, and vendor management of a comprehensive benefits portfolio, including self-funded health plans, retirement programs, leave and absence management, recognition programs, and ancillary benefits.

This role partners closely with Finance, Legal/Compliance, Payroll, HR Operations, and global HR teams to deliver a competitive, cost-effective, scalable benefits experience and ensure strong governance while remaining hands-on in execution. The ideal candidate brings deep technical expertise, strong financial and analytical skills, sound judgment, and the ability to balance employee experience, compliance, and cost in a global public-company, high-growth semiconductor environment.

Essential Duties and Responsibilities:

• Own the multi-year benefits strategy, aligning plan design and investment with talent, wellbeing, and financial objectives for a public, high-growth semiconductor organization.
• Lead annual plan design and renewal for self-funded medical/Rx, dental, vision, and other health plans; develop recommendations using data-driven insights (utilization, trend, risk, stop-loss, PBM performance).
• Serve as a subject-matter expert on leave programs (FMLA, ADA interactive process, state leaves, company LOAs), ensuring compliance and empathetic administration.
• Oversee 401(k) strategy and operations, including employer match, plan governance, fiduciary coordination with plan advisors/recordkeeper, nondiscrimination testing, and employee education.
• Manage employee recognition programs (service awards, peer recognition) to drive engagement and reinforce company values; continuously refine criteria, operations, and communications.
• Evaluate and optimize ancillary benefits (HSA, FSA, life/AD&D, disability, EAP, critical illness, accident, legal, ID theft) for competitiveness, utilization, and cost.
• Lead day-to-day administration in partnership with HR team and vendors; ensure accurate eligibility, enrollment, and payroll integrations.
• Own vendor relationships and RFPs (medical TPA, PBM, stop-loss, 401(k) recordkeeper, leave administrator, recognition platform); drive SLAs, fee transparency, and performance guarantees.
• Ensure compliance with ERISA, ACA, COBRA, HIPAA, FMLA, IRS, DOL, and SEC-related benefits disclosures as applicable to a public company; oversee plan documents, SPDs, SBCs, Form 5500, SARs, NDT for retirement plans, and required notices.
• Partner with Legal and Finance on SOX-relevant controls, audits, plan fiduciary committee materials, and risk mitigation; maintain comprehensive documentation and process controls.
• Manage open enrollment end-to-end: plan design approvals, cost modeling, communications, system configuration/testing, and post-implementation audits.
• Develop and monitor benefits KPIs (medical trend, PEPM, specialty Rx, HSA adoption, LOA incidence/duration, 401(k) participation/deferral rates, financial wellness engagement) and deliver insights to leadership.
• Create clear, inclusive benefits communications such as employee communications, guides, legal and program updates.
• Develop a small but critical benefits team, setting service standards, prioritization, and escalation protocols while fostering continuous improvement and strong vendor partnership.

Required Qualifications:

Education: Bachelor’s degree in Human Resources, Business, Finance, or related field (or equivalent experience).

Experience: 8 years of progressive benefits experience, including self-funded medical plan administration and 401(k) governance; 3 years owning enterprise level benefits programs or leading complex, cross functional initiatives.

Industry/Environment: Experience in high tech industry in a global environment required; manufacturing a preferred.

Technical Expertise:

• Deep knowledge of ERISA, ACA, COBRA, HIPAA, FMLA, ADA, IRS/DOL requirements, and retirement plan fiduciary best practices.
• Hands-on experience with leave administration (FMLA, ADA, state leaves) and third-party leave vendors.
• Demonstrated success reducing medical trend, optimizing stop-loss, and improving PBM outcomes.
• Proficiency with HRIS/benefits admin systems (e.g., SuccessFactors or similar), data analytics, and Excel/BI tools.

Skills:

• Vendor selection and negotiation, RFP leadership, and SLA management.
• Strong financial acumen (forecasting, PEPM analysis, contribution strategy, plan funding).
• Strong judgement in balancing employee experience, compliance, and cost.
• Foster a culture of accountability, continuous improvement, and strong internal and external partnership.
• Exceptional communication skills with the ability to translate complex topics for executives and employees.
• Project management across cross-functional teams with disciplined execution and change management.

Preferred Qualifications:

• Master’s degree, CEBS, CBP, or SPHR/SHRM-SCP certification(s).
• Experience supporting multi-state operations and global benefits coordination.
• Background managing recognition platforms and designing data-driven rewards programs.
• Experience supporting ADP payroll and system processing.
• Exposure to Off-Shore Captive Stop Loss programs.

Hybrid office environment; ability to collaborate across time zones and occasionally visit Amkor sites. Occasional travel (up to 10–15%) for vendor meetings and site support.

Location:

Tempe, AZ. This position has a hybrid schedule. Candidates must reside near the local Amkor office.

Amkor is proud to be an Equal Opportunity Employer. We do not discriminate on the basis of race, color, ancestry, national origin, religion or religious creed, mental or physical disability, medical condition, genetic information, sex (including pregnancy, childbirth, and related medical conditions), sexual orientation, gender identity, gender expression, age, marital status, military or veteran status, citizenship, or other characteristics protected by state or federal law or local ordinance.