HR Officer (Fixed Term 6-12 months)

Rio Tinto•Boron, CA

5d•$79,520 - $109,340•Onsite

About The Position

We are seeking a detail-oriented HR Officer to support HR operations with a strong focus on employee transactions, compliance, and HR administration. This role plays a critical part in ensuring accurate processing of employee data, legal requests, and workforce changes, while also supporting employees and leaders with day-to-day HR needs. This is a hands-on role in a fast-paced operational environment supporting both union and non-union populations.

Requirements

2–5 years of HR experience in a transactional or operations-heavy role
Experience processing employee data changes in HR systems (Workday, SAP, etc.)
Hands-on experience with: Employee movements/job changes, Payroll-related processes or coordination, High-volume administrative work with accuracy
Ability to manage multiple priorities with strong follow-through
High attention to detail with strong organizational and case-tracking skills

Nice To Haves

Experience processing garnishments, subpoenas, or legal HR requests
Experience supporting union environments (job bids, movement rules)
Familiarity with Kronos timekeeping
Knowledge of California employment requirements

Responsibilities

Process employee lifecycle transactions in HR systems (hires, transfers, promotions, separations)
Support and administer internal job bids and movement processes in alignment with policy/CBA
Maintain accurate and timely employee data changes in Workday/SAP
Ensure all employee records are complete, compliant, and audit-ready
Manage position and org structure updates as needed
Process and manage wage garnishments, levies, and income withholding orders
Respond to and coordinate subpoenas and employment-related legal requests
Partner with Payroll and Legal to ensure timely and compliant handling of sensitive requests
Maintain strict confidentiality and documentation standards
Act as an HR liaison for timekeeping-related questions, partnering closely with the Timekeeper and Payroll teams
Support review and validation of timekeeping data as needed (e.g., discrepancies impacting HR processes, leave, or employee status changes)
Assist in resolving employee inquiries related to pay, time corrections, and payroll adjustments in coordination with the Timekeeper
Ensure alignment between HR records (e.g., employee movements, leave status) and timekeeping/payroll systems
Respond to employee inquiries (policies, pay, status changes, documentation)
Support documentation for employee relations and investigations
Assist with grievance administration and tracking (union environment)
Maintain logs and trackers for: Employee movements, Leave cases, Garnishments and legal requests, Investigations and accommodations
Support audits and ensure compliance with company policies and California requirements
Serve as a key point of contact for HR-related administrative and operational questions
Partner with HR, Payroll, Benefits, and leaders to ensure seamless execution of processes

Benefits

Outstanding personal development
Global career opportunities
Permanent employment
Huge range of additional benefits
World class reputation for safety and performance
Safety-focused and inclusive working environment
Advantageous salary package with annual cash incentive awards (STIP) for eligible employees
Access to top-tier family-friendly health programs including medical, prescription drug, dental, vision, life insurance coverage, and various voluntary benefits.
Excellent retirement plan including up to 6% defined company contribution
Generous 401k matching program
Generous Rio Tinto employee share program, which allows you to purchase Rio Tinto Company shares.
Comprehensive leave policies which cover all moments that matter in life: PTO (paid time off), paid holidays, and paid bereavement leave.
A favorable child-caregiver leave program (Up to 100% salary top-up)
Discount programs for leisure purposes
Access to Virgin Pulse with incentives supporting your wellbeing
Ongoing Employee Assistance Program (EAP) for you and your family; to help in addressing educational opportunities, addiction treatment, depression, stress, domestic issues, financial management, and legal concerns.