As an Organization Management Administrator, you manage personnel data and maintain the organizational structure within HR systems (SAP/MyHR), ensuring that all changes are implemented accurately and on time. You support HR colleagues and Human Resources Managers (RRH) and ensure data synchronization between local and global systems. As a Personnel Administration Administrator, you manage HR administrative processes for employees, ensuring compliance with labor regulations, internal policies, and data quality standards.

Key Responsibilities

• Maintain the organizational structure in SAP (OM), including units, positions, reporting lines, cost centers, PMDR and SWP data, and local codification rules
• Process requests via HR Renewal or SAP backend and ensure timely implementation of changes
• Monitor data interfaces and resolve errors between local and transversal systems, implementing sustainable solutions
• Collaborate with Data Quality Centre and HR Shared Services to ensure data accuracy
• Support HR users and managers with system usage and process-related questions
• Contribute to continuous improvement of HR processes and data quality
• Manage employee administrative processes including onboarding, contractual updates, and personnel file maintenance
• Coordinate workforce administration requests via Neocase
• Administer employee time and attendance records and track absences (leave, part-time, exceptional cases)
• Manage advance payment requests and administrative follow-up
• Support occupational accident declarations and employee representative mandates
• Coordinate apprenticeship and work-study (alternance) administration
• Manage medical restrictions, exemptions, and supporting documentation
• Ensure collection, validation, and maintenance of employee documents
• Ensure compliance with labor law, collective agreements, and internal HR policies
• Liaise with managers, employees, payroll teams, and external stakeholders
• Maintain HR data quality across systems and files

Requirements & Competencies

• Degree: Bachelor’s degree preferably in Payroll, HR, or a related field
• Experience in HR administration and/or organizational management
• Experience in payroll and personnel administration data management
• Knowledge of payroll in France, including apprentices
• Knowledge of the National Collective Agreement for Metallurgy and AM France agreements
• Understanding of payroll regulations and time management rules in France
• Proficiency in SAP HR and Neocase tools
• Good knowledge of Excel and MS Office tools
• Fluent French and English
• Strong organizational skills and attention to detail
• Ability to work autonomously with high level of discretion and confidentiality
• Team-oriented and customer service-oriented mindset
• Analytical thinking and problem-solving skills
• Interest in digitization and optimization of HR processes
• Ability to ensure data accuracy, compliance, and process efficiency

ArcelorMittal is the world's leading steel and mining company, with a presence in 60 countries and primary steelmaking facilities in 15 countries. Our material is part of the fabric of life. What we produce makes a difference – to individuals, communities, businesses and society. At ArcelorMittal, the safety, health, and wellbeing of our employees are our top priorities. We believe that every accident is avoidable, and it is essential for every employee, from the shop floor to the management committee, to hold this belief.

Our purpose is to produce ever smarter steels that have a positive benefit for people and planet. Steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. Steels for electric vehicles and renewable energy infrastructure that will support societies as they transform through this century. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change. This is what we believe it takes to be the steel company of the future.