Linux Administrator M F D

Role Purpose

The Linux Administrator is responsible for managing and securing enterprise Linux environments, ensuring systems are patched, hardened, and compliant with industry standards such as CIS Benchmarks and DISA STIGs.

The role focuses on OS-level patching, kernel hardening, SELinux enforcement, and automation of patch orchestration, ensuring minimal downtime across large-scale, business-critical environments. This position plays a key role in maintaining system stability, security, and operational efficiency.

Key Responsibilities

• OS Patch Management & Compliance
• Execute OS-level security patching across Linux environments (RHEL, CentOS, etc.)
• Align patching processes with:
• CIS Benchmarks
• DISA STIG standards
• Ensure timely identification and remediation of vulnerabilities
• Monitor patch compliance and generate reports for audits and governance
• System Hardening & Security
• Perform kernel-level hardening to enhance system security
• Configure and enforce SELinux policies across environments
• Implement secure configurations in line with enterprise security standards
• Identify and remediate system misconfigurations and vulnerabilities
• Patch Automation & Orchestration
• Design and manage automated patching workflows using:
• Ansible
• Red Hat Satellite (or equivalent tools)
• Develop playbooks and automation scripts for:
• Patch deployment
• Configuration management
• Routine maintenance tasks
• Ensure scalability and repeatability of patching processes
• System Availability & Maintenance
• Minimize downtime during patching and updates through:
• Careful planning and scheduling
• Use of rolling updates and high-availability strategies
• Perform system monitoring and proactive maintenance
• Support troubleshooting for patch-related or system performance issues
• Infrastructure Operations & Support
• Maintain and administer Linux-based servers in enterprise environments
• Support production environments with a focus on:
• Stability
• Performance
• Security
• Work closely with:
• Infrastructure teams
• Security teams
• Application owners
• Compliance, Documentation & Audit
• Ensure systems comply with:
• Internal IT/security policies
• Regulatory requirements (banking/enterprise)
• Maintain documentation of:
• Patch status
• System configurations
• Automation scripts and processes
• Support audits and compliance assessments
  
  

• Bachelor’s degree in:
• Information Technology
• Computer Science
• Systems Engineering or related field
  

• 5–8 years of experience in:
• Linux system administration
• Enterprise infrastructure environments
• Strong hands-on experience with:
• OS patching and system hardening
• Large-scale production environments
• Experience in regulated industries (e.g., banking) is preferred
  
  

• 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 hardening techniques
• Configuration management tools (Ansible, Satellite)
• Familiarity with:
• CIS Benchmarks and DISA STIG frameworks
• Monitoring and logging tools
• Proficiency in:
• Shell scripting (Bash) and automation
  

• Red Hat Certified Engineer (RHCE)
• Red Hat Certified System Administrator (RHCSA)
• Linux Foundation Certified System Administrator (LFCS)
  
  

• 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
  
  

• Linux System Administration
• Patch Management & Automation
• System Hardening & Security
• Infrastructure Stability & Operations
• Compliance & Governance
• Process Automation
  
  

• Experienced Linux administrator with strong security and patching expertise
• Hands-on with automation tools like Ansible and Satellite
• Familiar with enterprise security standards (CIS/STIG)
• Capable of managing large-scale, mission-critical environments with minimal downtime
• Balance of technical depth, operational discipline, and security awareness