Job Title: Senior System Administrator
Location: Brussels, Belgium
Job Type: Hybrid
Duration: 5 MONTHS and Extension is possible
Languages: Dutch, French, English
Job description
We are looking for a skilled and motivated Senior System Administrator to lead the development and evolution of the organisation’s software and systems infrastructure. As a Senior Senior System Administrator, you will together with the team while ensuring the reliability, performance, and modernisation of server environments. You will work within a bilingual, interdisciplinary team and collaborate closely with experts in telecommunications interception, infrastructure engineering, and IT operations. Your mission will be to:
Responsibilities:
* Systems Engineering & Infrastructure Management
* Administer and maintain server environments (Windows/Linux).
* Manage Active Directory, GPO, DNS, DHCP.
* Monitor and optimise virtualised environments (VMware, Proxmox, Hyper-V).
* Ensure system security, patching, backups, and business continuity.
* Contribute to the design and evolution of robust, scalable system architectures.
* Automate recurring tasks using scripting tools (Python, Powershell, Pearl, Ansible).
* Collaborate with network, security, and support teams to ensure end-to-end system reliability.
* Operational Excellence & Collaboration
* Diagnose and resolve complex technical issues (software or system-related).
* Take ownership of assigned tasks, assess risks, and escalate when needed.
* Document infrastructure, processes, and application components
* Work effectively in a multilingual, interdisciplinary environment.
* Contribute as a team player while being fully capable of working independently.
Required experience:
* Minimum 7 years of experience in system administration (Windows and Linux).
* Solid skills in virtualisation, storage, and security.
* Knowledge of cloud environments (Azure, AWS) is a plus.
* Scripting skills (PowerShell, Bash, Python or equivalent).
* Understanding of infrastructure components (network, security, identity management).
Soft Skills and Professional qualities
* Bachelor’s or master’s degree in IT, or equivalent professional experience.
* Strong analytical mindset with a focus on continuous improvement.
* Pragmatic, solution-oriented approach to technical challenges.
* Curious, proactive, and eager to learn and explore new technologies.
* Excellent communication skills, able to present complex information clearly.
* Discrete, stress-resistant, and reliable in critical environments.
* Fluent in French or Dutch, with good understanding of the other language.
* Good command of written and spoken technical English.