Senior Windows & Linux Systems Administrator

Tasks and responsibilities

As a Senior System Administrator, you will help develop, maintain and modernise the organisation’s systems and software infrastructure in a highly secure operational environment. You will work in a bilingual, multidisciplinary team and contribute to the reliability, performance and evolution of the server landscape.

Working from home two days per week is allowed.

️ Responsibilities:

• Administer and maintain Windows and Linux server environments.
• Manage core infrastructure services such as GPO, DNS, DHCP and Active Directory.
• Monitor, manage and optimise virtualised environments including VMware, Proxmox and Hyper-V.
• Support storage platforms and help ensure availability, performance and continuity.
• Maintain system security, patching, backups and business continuity measures.
• Contribute to the design and evolution of robust, scalable infrastructure architectures.
• Automate recurring tasks with scripting and automation tools such as PowerShell, Bash, Python, Perl and Ansible.
• Work closely with infrastructure, network, security and support colleagues to ensure end-to-end reliability.
• Diagnose and resolve complex system- and software-related issues.
• Take ownership of assigned work, evaluate risks and escalate when needed.
• Document infrastructure, processes and application components clearly.
• Operate effectively both independently and as part of a multilingual, interdisciplinary team.

Your profile

• Minimum 7 years of experience in system administration across Windows and Linux environments.
• Strong expertise in system administration, virtualisation, storage and security.
• Proven experience with Active Directory and large-scale infrastructure migrations.
• Good knowledge of scripting, including PowerShell, Bash and Python.
• Understanding of infrastructure domains such as networking, security and identity management.
• Knowledge of cloud environments such as Azure or AWS is a plus.
• Bachelor’s or master’s degree in IT, or equivalent relevant experience.
• Analytical, pragmatic and solution-oriented mindset, with a focus on continuous improvement.
• Curious, proactive and comfortable learning new technologies.
• Clear communication skills and the ability to explain complex topics in an understandable way.
• Discrete, reliable and stress-resistant in critical environments.
• Fluent in French or Dutch, with a good understanding of the other language.
• Good written and spoken technical English.
• A TOP SECRET security clearance is required for this position.

Offer

You can count on an attractive salary, supplemented with extra-legal benefits, including a company car.

(Freelance is also possible)