HR Shared Services Specialist

HR Shared Services Specialist

Location:

Naperville, Illinois (Based in Aurora, Illinois)

INEOS Styrolution is the world’s leading styrenics supplier, with a high-performing portfolio of styrene monomer, polystyrene, ABS and advanced styrenic products. With more than 90 years of innovation in materials science, INEOS Styrolution is focused on customer satisfaction with differentiated solutions that provide a competitive edge as well as investments in technology that enable closed loop recyclability for styrenics while reducing our carbon emissions.

INEOS Styrolution applications can be found in many everyday products across multiple industries: automotive, electronics, household, construction, healthcare, packaging, and toys/sports. Operating 17 production sites in nine countries, the company is a wholly owned subsidiary of INEOS Group Limited and employs approximately 3,000 people. Sales were 4.5 billion euros in 2023. More information:

This position is responsible for delivering accurate and timely payroll services, managing payroll systems and reporting, assisting with benefits administration, and supporting audits and compliance across multiple locations. Based in Aurora, Illinois, this role supports the U.S. payroll processing, system management (Dayforce and SAP Success Factors), and employee support, with potential to support our Mexico payroll. The ideal candidate brings strong analytical skills, attention to detail, and a passion for service excellence—ideally within a manufacturing environment.

• Process bi-weekly payroll accurately and on time, including validating timesheets and preparing payroll imports.
• Manage Dayforce Time & Attendance and Scheduling modules; ensure accurate data entry and resolve issues.
• Reconcile payroll data and support accurate tax filings, garnishments, and benefits deductions.
• Analyze discrepancies and resolve payroll issues proactively, identifying root causes and trends.
• Assist new hires and exiting employees with benefit plan enrollments, live event changes, and answer related employee questions.
• Support Benefits Administration with compliance of applicable laws and regulations and related reports.
• Lead payroll audits and ensure compliance with internal controls and applicable legal and regulatory requirements.
• Generate and analyze payroll reports, including labor cost, budget variances, and forecasting support.
• Act as a subject matter expert for Mexico payroll, ensuring compliance with regional tax and labor laws.
• Collaborate with HR, Finance, and IT teams to enhance payroll systems (Dayforce and SAP Success Factors) and drive process improvements.
• Support employees across the region with payroll-related inquiries, providing bilingual assistance where applicable (Spanish preferred).
• Foster effective communication with leadership and plant teams to ensure alignment and responsiveness.
• Contribute to a culture of flexibility, teamwork, and accountability—especially during high-demand cycles.

• Associate’s degree in Accounting, Business, or a related field required;
  Bachelor’s degree preferred or equivalent experience.
• 5+ years of payroll experience, ideally within a shared services or centralized payroll environment.
• Knowledge of US payroll process, tax regulations, labor laws, and garnishment procedures.
• Knowledge of Mexican payroll a plus, but not required.
• Familiarity with Dayforce and SAP Success Factors is required.
• Bilingual fluency in English and Spanish is preferred.

• Minimum 5 years of experience in payroll, preferably in a manufacturing or industrial environment.
• Demonstrated experience analyzing payroll data, reconciling discrepancies, and performing audits.
• Experience with benefits coordination, payroll imports, and employee support.
• Proven ability to build and run reports from payroll systems (especially Dayforce).
• Comfortable working in dynamic environments with occasional long hours or shifting priorities.

• Proficiency in Microsoft Office Suite, especially Excel (pivot tables, VLOOKUPs, formulas).
• Strong analytical skills with the ability to interpret and…