Oversee daily office operations: supplies, vendors, maintenance.Keep the office welcoming, organized, and efficient.Handle calls, correspondence, and greet visitors.Assist the CEO with travel bookings, agenda, and reservations.Coordinate meetings, company events, and external seminars with a sustainability focus (eco-friendly catering, venues, etc.).Support HR with onboarding, expenses, and updating staff tools.Contribute to team-building activities and workshops to promote a positive and sustainable workplace culture.Ensure accuracy in administrative follow-up and reporting.Be part of a mission-driven company shaping a sustainable future.Be valued for your autonomy, proactivity, and ambition.Education: Bachelor's or Master's degree (Office Management, HR, Administration, or similar).Experience: Experience is a plus, but motivation, ambition, and smart thinking matter more.Languages: Excellent English (C1) and strong French or Dutch (B2 minimum).Key Traits:Smart - quick learner, problem-solver.Autonomous - able to manage tasks independently.Motivated - eager to take responsibility.Ambitious - wants to grow in HR and administration.Proactive - takes initiative and gets things done.Sustainability mindset - aligns with the mission of building a greener future.This international organization is a global leader in regulatory and sustainability intelligence. They empower companies worldwide to reduce their environmental footprint, strengthen workplace safety, and build a healthier future. By providing actionable insights, they help Fortune 500 businesses turn compliance into real sustainability impact. Joining this company means contributing to a greener, safer, and more responsible world.Contract: Full-time (38h/week) or 80% option. * Atractive salary and benefitsWork setup: Role requires on-site presence in Brussels; some flexibility possible (1 day remote after onboarding, flexible hours).Growth: Chance to grow into HR tasks and responsibilities within a company leading the way in sustainability and compliance.
