Linux Administrator (m/f/d)
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Key skills for this role
About the Role
Halian seeks a Linux Administrator to manage and secure enterprise Linux environments. The role focuses on OS patching, kernel hardening, SELinux enforcement, and automation using Ansible and Red Hat Satellite.
Key Skills for This Role
Responsibilities
- Execute OS level security patching across Linux environments (RHEL, CentOS, etc.) and align with CIS Benchmarks and DISA STIG standards.
- Perform kernel level hardening and configure SELinux policies across environments.
- Design and manage automated patching workflows using Ansible and Red Hat Satellite.
- Minimize downtime during patching through careful planning and high availability strategies.
- Maintain and administer Linux based servers in enterprise environments, supporting production stability, performance, and security.
- Ensure systems comply with internal IT/security policies and regulatory requirements, and maintain documentation of patch status and configurations.
Requirements
- Bachelor's degree in Information Technology, Computer Science, Systems Engineering or related field
- 5–8 years of experience in Linux system administration in enterprise infrastructure environments
- Strong hands on experience with OS patching and system hardening in large scale production environments
- Experience with SELinux configuration and troubleshooting
- Proficiency in Shell scripting (Bash) and automation
- Experience with configuration management tools (Ansible, Satellite)
- Familiarity with CIS Benchmarks and DISA STIG frameworks
- Red Hat Certified Engineer (RHCE) or equivalent certification (preferred)
Full Job Posting
Role Purpose
- The Linux Administrator is responsible for managing and securing enterprise Linux environments, ensuring systems are patched, hardened, and compliant with CIS Benchmarks and DISA STIGs.
Key Responsibilities
- OS Patch Management & Compliance: Execute OS level security patching across Linux environments (RHEL, CentOS, etc.) aligned with CIS Benchmarks and DISA STIG standards.
- System Hardening & Security: Perform kernel level hardening, configure SELinux policies, and implement secure configurations.
- Patch Automation & Orchestration: Design and manage automated patching workflows using Ansible and Red Hat Satellite.
- System Availability & Maintenance: Minimize downtime during patching through careful planning and high availability strategies.
- Infrastructure Operations & Support: Maintain and administer Linux based servers in enterprise environments.
- Compliance, Documentation & Audit: Ensure systems comply with internal policies and regulatory requirements, and maintain documentation.
Qualifications & Experience
- Bachelor’s degree in Information Technology, Computer Science, Systems Engineering or related field.
- 5–8 years of experience in Linux system administration in enterprise infrastructure environments.
- Strong hands on experience with OS patching and system hardening in large scale production environments.
- Experience in regulated industries (e.g., banking) is preferred.
Technical Skills
- Strong expertise in Linux OS (RHEL, CentOS, Oracle Linux, etc.), system hardening, and security best practices.
- Experience with SELinux configuration and troubleshooting, kernel tuning, and configuration management tools (Ansible, Satellite).
- Familiarity with CIS Benchmarks and DISA STIG frameworks, monitoring and logging tools.
- Proficiency in Shell scripting (Bash) and automation.
Certifications
- Red Hat Certified Engineer (RHCE)
- Red Hat Certified System Administrator (RHCSA)
- Linux Foundation Certified System Administrator (LFCS)
Soft Skills
- Strong troubleshooting and analytical skills
- Attention to detail with a security focused mindset
- Ability to manage critical systems under pressure
- Effective communication and collaboration skills
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