We are looking for a Medior IT Security Engineer to strengthen the infrastructure and security team.
In this role, security, compliance and patch management are embedded from design to deployment, following a DevSecOps approach. You work hands-on in a heterogeneous infrastructure where availability, standardisation and risk control are key.
Your responsibilities
- Security, patching & hardening
- Infrastructure & automation
- Security & compliance
- Collaboration =
- Work closely with infrastructure, operations and application teams
- Support system stability and availability after patching activities
- Provide clear reporting on patch status, risks and remediation actions
Technical environment
- Operating systems: Windows Server, Linux
- Virtualisation & platforms: VMware, Citrix
- Infrastructure: On-prem datacenter
- Tools (indicative): Microsoft SCCM, automation and scripting tools
Your profile
- Experience as a system or security engineer in infrastructure environments
- You have expert-level knowledge of Cyber Security and apply security principles consistently across infrastructure environments.
- You work at expert level with Microsoft SCCM, using it for patch management, deployment and system compliance.
- You have advanced experience with VMware, managing and securing virtualised environments.
- You administer and secure Windows Server environments at an advanced level, including hardening and patching.
- You have intermediate experience with Citrix, supporting virtualised user and system environments.
- You work comfortably with Linux at an intermediate level, including system administration and security-related tasks.
- Strong focus on security, patch management and system hardening
- Comfortable working in environments with technical debt and legacy systems
- Able to work autonomously while collaborating with multiple teams
- Structured, reliable and security-minded
Work setup
- Freelance full-time position
- Primarily on-site
- Up to 2 days per week remote work possible after onboarding
Key Skills
Ranked by relevance
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- Posted
- Jan 08, 2026
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Brussels Metropolitan Area
- Company
- Recruitment Sisters
Industries
Categories
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