• Unix/Linux Administrator

    Leader Communications Inc. (Portsmouth, VA)


    Position Summary

    The Unix/Linux Administrator 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.

     

    Duties & 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.

    + 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.

     

    Education & Experience Requirements

     

    + Bachelor’s degree in an IT-related discipline (e.g., Computer Science, Information Technology, Software Engineering) or Level II Certification (Security+ or better) AND four (4) years of relevant experience

    + 5-7 years of experience with Unix/Linux system administration in enterprise or DoD environments

    + Microsoft Certified: SharePoint Server Hybrid Administrator Associate, Microsoft Certified: Windows Server Administrator, and CompTIA Security+ are desired

    + SECURITY CLEARANCE REQUIREMENTS: Active DoD Secret clearance with eligibility for higher-level access (SCI/SAP)

     

    Skill & Certification Requirements

     

    + SECURITY CLEARANCE REQUIREMENTS: Active DoD Secret clearance with eligibility for higher-level access (SCI/SAP)

    + Experience supporting Navy, shipyard, or DoD IT environments.

    + Familiarity with DoD cybersecurity tools (HBSS, ACAS).

    + 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.

    + 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.

    + Hands-on expertise in performance tuning, monitoring tools, and lifecycle management of storage infrastructure.

    + Strong analytical and problem-solving skills with the ability to resolve complex technical issues in time-sensitive situations.

    + Excellent communication and documentation skills, with the ability to collaborate across technical teams.

    + Position requires sitting, for long periods of time. (Sedentary Work)

    + Most duties require extended use of a keyboard and computer monitor

    + Extended Telephone Use

    + May require lifting of 20-50 lbs

    + LCI is an Equal Opportunity Employer/Veterans/Disabled

     

    Leader Communications is an Affirmative Action and Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. If you’d like to view a copy of the company’s affirmative action plan or policy statement, please email [email protected]