Senior HR Specialist

Trinseo is a different kind of global materials company – at the intersection of people, technology, and customers. We are a world leader in the production of plastics and latex binders. Our culture is built on passion and innovation.

A career at Trinseo presents a unique opportunity to work in a highly collaborative environment. Helping customers solve their most complex material challenges is the reason we come to work each day. We are seeking innovative thinkers – ready to tackle any challenge and passionate about delivering value.

As a global materials solutions provider focused on delivering innovative and sustainable solutions to our customers, we need people to feel respected and included so they can be more creative, innovative, and successful. We strive to create workplaces that reflect all communities and customers we serve and where everyone feels empowered to bring their full, authentic selves to work. That's why we're fully committed to inclusion across race, gender, age, religion, identity, and experience to drive us forward every day.

About the role:

Responsible for managing all HR matters in Taiwan and providing administrative HR support to Singapore. This role focuses on delivering high-quality HR services to employees and managers, handling day-to-day transactions and inquiries, and ensuring compliance with local employment laws and regulations. The incumbent will contribute to workforce strategy development and provide decision support. He/ She will also independently address employee questions, issues, and requests in a timely and effective manner.

Scope: Responsible for all HR matters in Taiwan (96 employees), with potential backup support for India or Singapore.

• HRIS system Management and Documentation

Ensure 100% data accuracy and compliance across HRIS platforms (Workday, iCIMS, and local attendance system). Responsible for maintaining audit readiness and executing updates in line with the Delegation of Authority (DOA) policy.  Provide HR administrative support for the Singapore office (8 employees), including maintaining leave records and managing flex-point documentation.

• Payroll preparation

Provide timely and accurate employee data—including attendance, overtime, new hires, terminations, absences (e.g., maternity leave), and awards—to payroll administrators. Ensure proper documentation is in place and maintain data integrity for internal and external audits.

• HR Advisory & Employee Relations

Handle employee lifecycle transactions including:

• Recruitment: job postings, resume screening, interviews, and contract preparation
• Promotions: coordinate gate review meetings
• Transfers: liaise with leadership and assess organization stability
• Salary adjustments and terminations: manage process and conduct exit interviews

• Deliver legal compliance and guidance on labor laws (e.g., minimum wage, overtime, documentation). Provide HR policy interpretation to employees and leaders.
• Act as the primary point of contact for local employee inquiries and support effective communication of business decisions to employees.

• Vendor Management

Oversee key HR vendors, including:

• Dispatch service providers
• Recruitment agencies
• Group insurance broker
• Local attendance system providers
• Outplacement services and EAP providers

Collaborate with COE and Procurement on vendor selection and contract management.

• HR expertise

Support the implementation of global HR strategies and tailor policies and processes to meet local business needs. Act as a strategic partner by providing local HR insights and compliance feedback to Global HR and Centers of Excellence (COEs). Partner with leadership on succession planning and advise on organizational optimization in terms of time and cost efficiency.

• Recruitment:

Manage end-to-end recruitment for Taiwan:

• Guide hiring managers in using iCIMS
• Create and manage job requisitions
• Coordinate job postings (internal and external)
• Conduct intake meetings, schedule interviews, and lead HR interviews
• Perform reference checks and support package negotiation and preparation