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Office Assistant - Sustainability sector - Brussels

Brussels-city Temporary View Job Description
We're seeking an Office Assistant in Brussels to keep daily operations running smoothly and support the CEO and HR team. 60% office management (suppliers, vendors, organization), 40% admin (CEO travel, events, HR support). Ideal for a motivated junior professional eager to grow into HR, contribute to sustainability initiatives, and make a real impact.

added 09/02/2026

  • Be part of a mission-driven company shaping a sustainable future.
  • Be valued for your autonomy, proactivity, and ambition.

About Our Client

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.

Job Description



  • 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.



The Successful Applicant



  • 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.



What's on Offer



  • Contract: Full-time (38h/week) or 80% option.
  • Atractive salary and benefits


  • Work 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.



Contact
Victoria Moes
Quote job ref
JN-082025-6815147

Job summary

Sector
Business Support
Sub Sector
Office Assistant
Industry
Business Services
Location
Brussels-city
Contract Type
Temporary
Consultant name
Victoria Moes
Job Reference
JN-082025-6815147

PageGroup is an equal opportunity employer committed to workforce diversity, both as an employer as well as a recruitment service provider. Each recruitment decision we make for people we hire and people we place into new roles is based solely on the candidates’ knowledge, experience and skills.