Network and Computer Systems Administrator (Unix/Linux), Top Secret Clearance

Job Title: Network and Computer Systems Administrator (Unix/Linux), Top Secret Clearance

Job Type : Full-Time, On-site, (Pending Contract Award)

Location: NNSY, Portsmouth, VA

Clearance Required: Position requires an active DoD Top Secret clearance with eligibility for higher-level access (SCI/SAP)

Experience Level: (10–15 years)

Certifications Required: CCNA and Network + Certification. CWNA is a plus but not required

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 Network and Computer Systems Administrator (Unix/Linux), with a Top-Secret Clearance 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.

Key Responsibilities

• 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.

Technical Expertise

• Strong background in Unix/Linux operating systems and enterprise-level troubleshooting.
• Proficiency in scripting and automation (Bash, Python, Ansible).
• Experience with security baselines, DISA STIGs, and DoD/RMF/NIST compliance.
• Knowledge of authentication and authorization services.
• Familiarity with virtualization and containerization (VMware, Docker, Podman, Kubernetes).
• Skilled in storage integration and file system administration.
• Experience with enterprise monitoring and log analysis tools.

Required Qualifications

• Bachelor’s degree in computer science, Information Technology, or related field.
• 10+ years of Unix/Linux system administration in enterprise or DoD environments.
• CCNA and Network + Certification. CWNA is a plus but not required
• 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 Top Secret clearance (minimum).

Preferred Attributes

• Experience supporting Navy, shipyard, or DoD IT environments.
• Familiarity with DoD cybersecurity tools (HBSS, ACAS).
• Active Top Secret clearance with SCI/SAP eligibility.
• Certifications such as RHCSA/RHCE, CompTIA Linux+, Security+, or CISSP.
• Experience with IT modernization, cloud adoption, or infrastructure transformation.
• Proven ability to support mission-critical operations with minimal downtime.

MILVETS offers an excellent benefits package including Health Insurance, Dental Insurance, Life Insurance, Disability Insurance, Vision, 401(k), Paid Time Off.

Applicants for U.S. based positions with MILVETS Systems Technology, Inc. must be legally authorized to work in the United States. Verification of employment eligibility will be required at the time of hire. Visa sponsorship is not available for this position.

E-Verify is a registered trademark of the U.S. Department of Homeland Security. This business uses E-Verify in its hiring practices to achieve a lawful workforce.

Equal Employment Opportunity

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.

MILVETS Systems Technology, Inc. is an Equal Employment Opportunity/Affirmative Action Employer and maintains a Drug-Free Workplace.

MILVETS Systems Technology, Inc. (“MILVETS”) uses JazzHR Talent Fit AI to assist in candidate evaluation. This tool leverages artificial intelligence to generate insights but does not make autonomous hiring decisions . All employment decisions are made solely by MILVETS’ recruitment and management teams.

Candidate data processed through JazzHR Talent Fit AI is handled in compliance with applicable privacy and data protection regulations, including GDPR , and MILVETS’ internal policies. MILVETS is an Equal Opportunity Employer (EOE) and complies with all relevant EEOC regulations to ensure fair and equitable hiring practices.

By applying, candidates acknowledge and consent to the use of this tool for recruitment purposes.