cFocus Software seeks a Linux System Administrator to join our program supporting the National Institutes of Health (NIH). This position is fully remote. This position requires a Public Trust or the ability to obtain a public trust clearance. Qualifications:

• 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 preferred
• RHCSA, RHCE, CompTIA Security+, Linux+, GCUX, or CISSP (preferred)

Duties:

• 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.