Linux Administrator (m/f/d)
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Key skills for this role
About the Role
Halian is seeking a Linux Administrator to manage and secure enterprise Linux environments. Responsibilities include OS-level patching, kernel hardening, SELinux enforcement, and automation of patch orchestration using Ansible and Red Hat Satellite.
Key Skills for This Role
Responsibilities
- Execute OS level security patching across Linux environments (RHEL, CentOS, etc.)
- Align patching processes with CIS Benchmarks and DISA STIG standards
- Perform kernel level hardening and configure/enforce SELinux policies
- 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
- Support audits and compliance assessments, maintain documentation of patch status and system 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 in regulated industries (e.g., banking) is preferred
- Strong expertise in Linux OS (RHEL, CentOS, Oracle Linux) and system hardening
- Experience with SELinux configuration and troubleshooting, kernel tuning, and configuration management tools (Ansible, Satellite)
- Familiarity with CIS Benchmarks and DISA STIG frameworks
- Proficiency in shell scripting (Bash) and automation
Full Job Posting
Role Purpose
- The Linux Administrator manages and secures enterprise Linux environments, ensuring systems are patched, hardened, and compliant with CIS Benchmarks and DISA STIGs.
- Focus on OS level patching, kernel hardening, SELinux enforcement, and automation of patch orchestration.
Key Responsibilities
- Execute OS level security patching across Linux environments (RHEL, CentOS, etc.).
- Align patching processes with CIS Benchmarks and DISA STIG standards.
- Ensure timely identification and remediation of vulnerabilities.
- Monitor patch compliance and generate reports for audits.
- Perform kernel level hardening and configure/enforce SELinux policies.
- Implement secure configurations in line with enterprise security standards.
- Design and manage automated patching workflows using Ansible and Red Hat Satellite.
- Develop playbooks and automation scripts for patch deployment, configuration management, and maintenance.
- Minimize downtime during patching through careful planning and high availability strategies.
- Maintain and administer Linux based servers in enterprise environments.
- Work closely with infrastructure, security teams, and application owners.
- Support audits and compliance assessments, maintain documentation.
Qualifications & Experience
- Bachelor's degree in IT, Computer Science, Systems Engineering or related field.
- 5–8 years in Linux system administration in enterprise environments.
- Strong hands on with OS patching and system hardening in large scale production environments.
- Experience in regulated industries (e.g., banking) preferred.
- Strong expertise in Linux OS (RHEL, CentOS, Oracle Linux) and system hardening.
- Experience with SELinux, kernel tuning, Ansible, Satellite.
- Familiarity with CIS Benchmarks and DISA STIG frameworks.
- Proficiency in Bash scripting and automation.
Technical Skills
- Linux OS (RHEL, CentOS, Oracle Linux)
- System hardening and security best practices
- SELinux configuration and troubleshooting
- Kernel tuning and hardening techniques
- Configuration management tools (Ansible, Satellite)
- CIS Benchmarks and DISA STIG frameworks
- Monitoring and logging tools
- Shell scripting (Bash) and automation
Certifications (Preferred / Required)
- Red Hat Certified Engineer (RHCE)
- Red Hat Certified System Administrator (RHCSA)
- Linux Foundation Certified System Administrator (LFCS)
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