Job Title: Unix/Linux Administrator – Secret clearance
Job Type: Full-Time, On-site, (Pending Contract Award)
Location: NNSY, Portsmouth, VA
Clearance Required: Position requires an active DoD Secret clearance with eligibility for higher-level access (SCI/SAP)
Experience Level: (7–10 years)
Certifications Required: Industry certifications such as RHCSA/RHCE, CompTIA Linux+, Security+, CISSP, or equivalent
Mandatory: Considering local candidates with US Citizenship only. Employer will not sponsor applicants for work visas for this position.
Overview: MILVETS is currently seeking a full-time, highly skilled Unix/Linux Administrator to join our IT support team in a mission-critical defense environment. The successful candidate will play a key role in administering and securing enterprise Unix/Linux systems, ensuring compliance with DoD cybersecurity standards, and supporting shipyard and naval operations. This role requires technical expertise, strong troubleshooting skills, and the ability to collaborate across multidisciplinary teams in a high-tempo environment.
About the company: Since its founding in 1986, MILVETS Systems Technology, Inc. has been a reliable provider of quality services in the information and technology fields. As a Service-Disabled Veteran-Owned Small Business, certified by the Small Business Administration as a Small Disadvantaged Business, the company was founded to offer efficient, cost-effective information technology services to commercial and government clients.

REQUIRED QUALIFICATIONS

• Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience).
• 5+ years of Unix/Linux system administration in enterprise or DoD environments.
• Demonstrated experience with cybersecurity compliance and vulnerability management.
• Ability to provide Tier II/III operational support and root-cause analysis.
• Strong communication and technical documentation skills.
• Active DoD Secret clearance (minimum).

• Administer and maintain Unix/Linux systems (Red Hat, CentOS, SUSE, Ubuntu, Solaris, AIX).
• Perform system installation, configuration, patching, kernel upgrades, and package management.
• Automate and streamline operations using scripting and configuration management tools (Bash, Python, Ansible).
• Implement system hardening, apply DISA STIGs, and remediate vulnerabilities to ensure IA/DoD compliance.
• Manage user accounts, authentication, and directory services (LDAP, Kerberos, NIS, Radius/TACACS+).
• Monitor system performance, availability, and security using enterprise monitoring tools (Nagios, Zabbix, Splunk, Elastic Stack).
• Support storage systems and integrations (NFS, iSCSI, SAN, NetApp, ZFS).
• Provide Tier II/III troubleshooting, root-cause analysis, and incident resolution.
• Maintain backup/restore operations and disaster recovery plans.
• Collaborate with system administrators, network engineers, cybersecurity personnel, and shipyard operations teams.
• Create and maintain documentation for system builds, procedures, and troubleshooting.
• Mentor junior administrators and provide technical guidance.