Medior Linux Engineer - Start 01/06 - Brussels - transport sector - Freelance / CDI

We are looking for a Medior Linux System Engineer with 3 to 5 years of experience managing Red Hat Enterprise Linux (RHEL) environments. You will join a team responsible for the deployment, operation, and maintenance of a large‑scale Linux infrastructure, comprising approximately 1,800 physical and virtual servers, primarily running on VMware ESX.

The role is hands‑on and operational in nature, within a critical infrastructure environment where reliability, documentation, and collaboration are essential.

• Operate, maintain, and support Red Hat Enterprise Linux systems in a large, mixed physical and virtual server environment
• Contribute to the automation and standardization of system management using configuration and orchestration tools
• Perform scripting tasks to support automation, monitoring, and operational efficiency
• Monitor system health and performance, identify issues, and contribute to root‑cause analysis
• Work closely with colleagues to document configurations, procedures, and operational practices
• Participate in an on‑call rotation, on average one week per month
• Proactively analyze and resolve complex technical situations with a critical and solution‑oriented mindset

• 3–5 years of experience administering Red Hat Enterprise Linux systems
• Experience with automation tools such as Puppet, Ansible, Foreman, or similar
• Scripting experience in Python and Shell
• Experience with monitoring tools (e.g. Zabbix or equivalent)
• Solid knowledge of VMware ESX
• Understanding of network terminology and architecture; knowledge of Cisco ACI is required
• Understanding of storage technologies, both local (RAID) and remote (SAN, NAS)
• Proven analytical skills to independently handle complex operational issues

Language Requirements

• Strong proficiency (C2 level) in Dutch or French (spoken and written)
• Practical knowledge (B1 level) of the second national language
• Good command of English (B2 level) for reading, writing, and comprehension

Soft Skills & Behavioural Competencies

• Ability to integrate smoothly into an existing infrastructure team
• Proactive attitude and critical thinking when analyzing problems
• Strong sense of responsibility and reliability, particularly in on‑call contexts
• Good documentation habits and willingness to share knowledge with colleagues
• Professional communication and respectful interaction with management and peers
• Motivation to commit to the assignment for its full duration