Senior DoD Linux Systems Administrator (TS/SCI)

Delaware Nation Industries; Dahlgren (IL); On-site; USD 120,000 - 125,000; Full time

Benefits offered by this job

Medical insurance

401K plan

Disability insurance

Pet insurance

Education reimbursement

Parking benefits

Transit benefits

Job summary

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced administration and engineering support for Air Force JWIC/JITS missions. Lead Linux platform security, virtualization, automation, and lifecycle management across trusted environments.

The role requires independent problem solving, collaboration with Government stakeholders, and the ability to develop repeatable processes and technical guidance for team members.

Qualifications

• At least six (6) years of professional Unix/Linux systems administration experience.

Responsibilities

• Administer, engineer, optimize, and maintain enterprise Linux systems and services across multiple security levels and operational environments.
• Install, configure, harden, patch, upgrade, and decommission Linux operating systems, applications, services, and supporting infrastructure.
• Support Red Hat Enterprise Linux and other approved Linux distributions, including system services, package management, storage, networking, authentication, logging, and performance tuning.
• Design and implement repeatable procedures for system builds, provisioning, configuration management, patching, backup, recovery, restoration, and lifecycle operations.
• Analyze complex system, application, hardware, virtualization, storage, and network problems; conduct root-cause analysis and implement durable corrective actions.
• Monitor system availability, resource utilization, capacity, performance, and security posture; identify risks and recommend improvements before they affect mission operations.
• Administer and troubleshoot VMware or comparable virtualized infrastructure, including virtual machines, images, templates, virtual networking, and storage dependencies.
• Develop and maintain scripts and automation using Bash, Python, Ansible, Puppet, or comparable tools to improve consistency, reduce manual effort, and support troubleshooting.
• Support DevSecOps practices, source-code or configuration repositories, automated workflows, and controlled deployment processes when applicable to the environment.
• Apply DISA STIGs, security baselines, vulnerability-remediation procedures, and other DoD cybersecurity requirements to Linux systems and applications.
• Execute or support ACAS/Nessus scans, vulnerability analysis, remediation, validation, and compliance reporting.
• Maintain secure system access, including accounts, roles, privileges, SSH, authentication services, certificates, keys, and least-privilege controls.
• Support SAN/NAS storage, NFS, iSCSI, file systems, backup infrastructure, and data-transfer services as assigned.
• Participate in system integration, testing, acceptance, change control, technical interchange meetings, exercises, and mission-readiness activities.
• Produce and maintain system documentation, architecture diagrams, standard operating procedures, configuration records, plans of action and milestones, and technical reports.
• Provide technical leadership, mentoring, knowledge transfer, and cross-training to Mid-level administrators and other team members.
• Coordinate with cybersecurity, network, Windows, application, database, service desk, and Government teams to resolve escalated incidents and maintain continuity of operations.
• Participate in scheduled maintenance, planned outages, incident response, and after-hours or on-call support as required by the contract.

Skills

Linux admin

VMware vSphere

Shell scripting

Automation tools

Security compliance

DoD regulations

Networking

Troubleshooting

Certifications

Education

Bachelor's degree

IAT III cert

Tools

Puppet Enterprise

Ansible

CloudBolt

Git

Docker

Job description

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced administration and engineering support for Air Force JWIC/JITS missions. Lead Linux platform security, virtualization, automation, and lifecycle management across trusted environments.

The role requires independent problem solving, collaboration with Government stakeholders, and the ability to develop repeatable processes and technical guidance for team members.