HR/Payroll Assistant

Interested in joining a winning team? A team whose employees are empowered to make a difference? Company: Olefins and Polymers USA LLC Job title Payroll and HR Administrative Assistant Grade 31 (non-exempt) Offer Range $65,500 - 80,000 (commensurate with experience) Location League City - (Hybrid) The O&P USA business includes the product lines Ethylene, Propylene, Butadiene, Polypropylene and High Density Polyethylene. Manufacturing sites include Chocolate Bayou Works (Alvin, TX), Battleground Manufacturing Complex (La Porte, TX), and Carson, (Carson, CA), with a division office in League City, TX. How this job fits in: The Payroll/HR Administrative Assistant will work as a key member of the O&P USA Human Resources Team at the League City, TX office. The Payroll/HR Administrative Assistant reports to the Human Resources Manager. The ideal candidate must have a background in payroll processing, Human Resources administration, strong willingness to learn, a great attitude, be a team player, and have the ability to multi-task and work independently. A great degree of personal initiative, strong interpersonal skills and the ability to prioritize is required. The successful candidate will be the single-point-of-contact regarding all payroll-related issues for the client group as well as other duties and activities that may be assigned. Attention to detail coupled with strong analytical skills is essential in this role. The Payroll/HR Admin processes payroll for a client group of approximately 250 people across 2 entities, multiple states, and 3 pay groups and acts as payroll back up for an additional entity. This role coordinates enterprise-wide payroll events such as bonus payments, processing schedule, payroll funding, regulatory reporting, and interfaces often with all levels of the organization. Responsibilities and Accountabilities Payroll Administration Developing a deep understanding of Workday payroll system Training line staff in administering payroll procedures, policies, and practices Managing basic payroll information Maintaining tax information and Electronic Funds Transfer updates Adding, editing payroll data, transactions, deductions for new hires, existing employees Certify accuracy of all timecard and payroll related transactions Entering hours, earnings, deductions, and auditing all payroll and benefits related transactions Processing pay advices and checks Complete funding and process GL reporting Auditing the pre-processed payroll & processing payroll corrections Completing all year end payroll related items Support and resolve payroll issues Assist with administrative duties related to scheduling and time sheet system for hourly employees Benefits Administration Benefits administration (information additions, changes, or deletions), invoicing and retroactive payments Answering employee questions and issue resolution Processing and tracking benefits invoices to systems for payment Tracking and coordinating California state leave benefits for eligible employees Assist with FMLA notification and tracking General Human Resources Administration Data entry to Workday: New Hire data, job and compensation changes Filing and maintaining personnel, benefit and confidential files Maintain and update HR SharePoint site as needed Process invoices for the HR team through SAP Oversee Fitness Center memberships and usage, including recording imputed income and membership fees through payroll Oversee Service Award processing and ordering for all of O&P USA VTA (LMS system) administrator backup Issuing approved communications Special projects and other responsibilities as requested Analytics and Reporting Prepare required regulatory reports (EEO-1, California Pay Data) Shadow Payroll tracking and maintenance Prepare manhours & absentee/occurrence reports Create Ad-hoc reports from various sources as needed Skills & Knowledge Required Education/Experience High School Diploma or equivalent required Experience with Workday or other HR Information Systems (HRIS) required Experience processing Payroll required; experience with Ex-Pat and California payroll strongly preferred Experience in an HR support role preferred Experience in a manufacturing environment preferred Strong organizational and communication skills Proficiency in MS Office products - Word, Power Point, Excel, Access, Outlook Ability to maintain strict confidentiality Ability to work with minimal direction Must be flexible and willing to handle a wide variety of responsibilities and take the initiative to manage tasks independently Excellent interpersonal skills and the ability to communicate clearly and concisely with individuals inside and outside the company Ability to effectively evaluate and prioritize workload Must be an effective team player, with focus on the success of the team, above own desires and personal agenda Proactive approach in seeking out solutions and answers rather than passing on problems to others Relentless attention to ensuring accuracy and timely follow up on unresolved issues #OPUSA Our culture is one of honesty and integrity with an emphasis on safety, health and environmental performance.On our team, people are acknowledged for embracing new practices that help create real value for customers. Location League City, TX, United States Type Full-time Business INEOS Olefins & Polymers USA Posted 03 August 2026 Closing Date 16 August 2026 Requisition ID REQ-2889 Job Details Location League City, TX, United States Discipline HR Type Full-time Business INEOS Olefins & Polymers USA Posted 03 August 2026 Closing Date 16 August 2026 Requisition ID REQ-2889 #J-18808-Ljbffr