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# Senior Infrastructure / Linux Security Engineer

- **Company:** ATS4IT
- **Location:** Elsene, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Kubernetes Security, Agile Methodology, Amazon Web Services, Microsoft Azure, Cloud Computing, Cyber Security, Linux, Identity and Access Management, Information Systems Security Architecture Professional, Network Security, Linux System Administration, Linux Security Modules, Log Analysis, Scrum Methodology, Red Hat Enterprise Linux, Ansible, Zero Trust Network Access, Shell Script, Security Information and Event Management, Software Vulnerability Management, Data Logging, Scripting, Reliability of Systems, Firewalls (Computer Science), Infrastructure Automation Frameworks, Information Technology, Patch Management, Terraform, Splunk, Docker, Vulnerability Analysis
- **Published:** October 27, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=b08565186a2ec4f5

## About the Role

Languages: C2 English
Nice to Have: French

 * -> Due to project-specific security and compliance requirements, only EU citizens are eligible to apply for this position., * Bachelor's or Master's degree in Computer Science, Cybersecurity, Information Technology, or a related field.
 * More than 10 years of experience in Infrastructure Engineering, Linux Administration, or IT Security.
 * Strong analytical and troubleshooting skills.
 * Excellent communication and collaboration abilities.
 * Ability to work effectively in Agile and cross-functional environments.
 * Security-focused mindset with a commitment to continuous improvement and operational excellence., * 10+ years of experience in Linux Infrastructure and Security.
 * Strong expertise with Red Hat Enterprise Linux (RHEL) and Linux system administration.
 * Experience with system hardening, vulnerability management, and patch management.
 * Strong knowledge of Identity & Access Management (IAM) concepts.
 * Experience with SIEM solutions, log analysis, and security monitoring.
 * Good understanding of network security, firewalls, and secure communication protocols.
 * Experience with shell scripting and automation.
 * Knowledge of security frameworks and compliance standards.
 * Experience investigating and resolving security incidents., * Experience with Microsoft Defender, CrowdStrike, Splunk, Elastic, or similar security platforms.
 * Experience with Docker and container security.
 * Experience working with AWS and/or Azure environments.
 * Knowledge of Ansible, Terraform, or Infrastructure-as-Code practices.
 * Experience with endpoint protection and vulnerability assessment tools.
 * Knowledge of Zero Trust and modern security architectures., * French language skills.
 * Security certifications such as Security+, CISSP, CEH, or equivalent.
 * Experience with Kubernetes security.
 * Experience in highly regulated or enterprise environments.

## Description

We are looking for an experienced Senior Infrastructure / Linux Security Engineer to join a dynamic team responsible for securing, maintaining, and evolving critical Linux-based infrastructure environments. The ideal candidate combines strong expertise in Linux administration, infrastructure security, vulnerability management, automation, and cloud technologies, with a proactive approach to ensuring system reliability and security., * Manage, secure, and optimize Linux-based infrastructure environments.

 * Monitor security events and investigate potential threats and incidents.
 * Implement security controls, hardening standards, and vulnerability remediation plans.
 * Maintain patching and update processes across infrastructure platforms.
 * Automate operational and security-related tasks.
 * Collaborate with infrastructure, cloud, and security teams to improve platform resilience.
 * Support security audits, compliance initiatives, and risk assessments.
 * Contribute to incident response and root cause analysis activities.
 * Improve monitoring, logging, and threat detection capabilities.
 * Promote security best practices across the organization.

Technical Environment

 * Red Hat Enterprise Linux (RHEL)
 * Linux Administration
 * IAM
 * SIEM
 * Splunk / Elastic
 * Microsoft Defender
 * CrowdStrike
 * Vulnerability Management
 * Docker
 * Bash / Shell Scripting
 * Ansible / Terraform
 * AWS and/or Azure
 * Security Monitoring & Incident Response
 * Agile/Scrum