Note: The job is a remote job and is open to candidates in USA. cFocus Software seeks a Linux System Administrator to join our program supporting the National Institutes of Health (NIH). This position requires expertise in administering enterprise Linux environments and involves a range of responsibilities from system optimization to security architecture support.

Responsibilities

• Administer, configure, maintain, and optimize enterprise Linux operating systems including Red Hat Enterprise Linux (RHEL), Rocky Linux, Ubuntu, and Oracle Linux
• Support Security Architecture engineering activities by designing, implementing, and maintaining secure Linux server architectures
• Implement Zero Trust Architecture principles including least privilege, identity-based access controls, micro-segmentation, and continuous verification
• Deploy, configure, and maintain enterprise authentication services (LDAP, Active Directory integration, Kerberos, SSSD, MFA)
• Perform operating system hardening using DISA STIGs, CIS Benchmarks, and NIST guidance
• Manage enterprise patching, software lifecycle management, kernel updates, and configuration management
• Develop automation using Bash, Python, Ansible, or similar tools to improve operational efficiency
• Support virtualization, cloud-hosted Linux systems, containers, and hybrid infrastructure
• Participate in architecture reviews, system engineering efforts, change management, disaster recovery, and system documentation
• Collaborate with Security Architects, Network Engineers, ISSOs, Vulnerability Analysts, and application teams to maintain secure enterprise infrastructure

Skills

• Public Trust Clearance
• B.S. Computer Science, Information Technology, or a related field
• 5+ years administering enterprise Linux environments
• Experience with enterprise infrastructure engineering, automation, virtualization, cloud technologies, and cybersecurity
• Experience supporting federal or highly regulated environments
• RHCSA, RHCE, CompTIA Security+, Linux+, GCUX, or CISSP

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