Job description

Sia is looking for a motivated student to support our HR and Office Management activities in Brussels, Boulevard de Waterloo 16.

You will work closely with the HR Manager, HR and Talent Acquisition Officers, the Sia management team, and the consultants, of course, on daily operations and transversal projects, gaining hands‑on experience in office management, HR administration, recruitment & onboarding support, fleet management, and internal communication.

Main tasks:

Office Management & Facilities

• Serve as a point of contact for employees and visitors at the office (reception, basic information, orientation)
• Support the day‑to‑day office operations: supplies, badges, mail, deliveries, meeting rooms
• Support the fleet management (mainly laptops and phones)
• Assist in the coordination with external suppliers (cleaning, maintenance, IT equipment, catering, etc.)
• Participate in small internal events logistics (breakfasts, afterworks, celebrations)
• Help ensure that the office environment is welcoming and well‑organized
• Contribute to internal communication
• Perform other ad‑hoc tasks to support the HR and Office Management team

HR Administration & Support

• Assist with the preparation, filing and updating of employee records and HR documents (contracts, annexes, certificates, etc.)
• Help maintain and update HR databases and HRIS tools (personal data, absences, holidays, etc.)
• Support the preparation of documents for payroll
• Support data entry and consolidation in Excel or other tools

Recruitment & Onboarding

• Publish job ads on various platforms and manage applications (screening CVs, updating tracking files)
• Schedule interviews with candidates and hiring managers
• Prepare onboarding documents and welcome packs for new hires and interns
• Help organize onboarding sessions and support new employees during their first days

In return, you can expect:

• Student job / internship with compensation according to Belgian regulations
• Real responsibilities from day one
• Strong learning opportunities and professional development
• International & multicultural environment that gives importance to diversity, inclusion, employee well-being and corporate social responsibilities actions.
• A great and modern working atmosphere with friendly and professional colleagues where innovation and entrepreneurship are encouraged
• Flexible & student‑friendly conditions
• Compensation in line with Belgian student contract / internship regulations