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Delaware Nation Industries

Tribal holding company, prime government contractor.

Senior Linux System Administrator

System AdministrationConfirmed live in the last 24 hours
Full-timeDahlgren, VA, USAIn-person

About the Job

Requirements

  • An active DoD Top Secret/Sensitive Compartmented Information security clearance is required.
  • At least six years of professional Unix/Linux systems administration experience are required.
  • A DoD 8570/8140-compliant IAT III certification, such as CISSP, CASP+, or another current DoD-approved equivalent, is required.
  • Demonstrated experience administering enterprise Linux systems in a DoD, intelligence, classified, or similarly regulated environment is required.
  • Strong knowledge of Linux system architecture, networking, storage, system services, access control, logging, troubleshooting, and performance tuning is required.
  • Experience with system backup and recovery, software and patch management, security hardening, vulnerability remediation, and configuration control is required.
  • Experience with virtualization technologies is required, preferably VMware vSphere and related management components.
  • Proficiency with shell scripting and demonstrated ability to automate or streamline system administration tasks are required.
  • Experience diagnosing complex technical issues, performing root-cause analysis, and communicating solutions to technical and nontechnical stakeholders is required.
  • Strong written and verbal communication skills and the ability to work independently, lead technical efforts, and collaborate across functional teams are required.

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.
  • Support authorized electronic and manual data transfers between network environments and troubleshoot transfer failures, integrity issues, and related operational problems.
  • 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.

Desired Qualifications

  • Experience supporting Air Force, JWAC, JITS, Joint, intelligence, or other DoD mission environments.
  • Experience with Red Hat Enterprise Linux 7/8/9 or successor supported releases, CentOS, Scientific Linux, Debian, or comparable distributions.
  • Experience with Puppet Enterprise, Ansible, CloudBolt, Git, Docker, or comparable automation and DevSecOps technologies.
  • Experience supporting multi-level security, cross-domain solutions, classified networks, data-transfer systems, or mission-essential communications environments.
  • Experience with ACAS/Nessus, HBSS/endpoint security tools, STIG Viewer, vulnerability-management platforms, or comparable DoD cybersecurity tools.
  • Experience with SAN/NAS technologies, NFS, iSCSI, RAID, LVM, XFS, ext4, ZFS, or other enterprise file systems.
  • Experience with DNS, DHCP, NTP, LDAP/Active Directory integration, RADIUS, PKI, certificates, SSH, TCP/IP, and firewall-related troubleshooting.
  • Experience with monitoring, logging, configuration-management, ticketing, and IT service-management platforms.
  • A bachelor's degree in information technology, computer science, cybersecurity, engineering, or a related field is preferred; equivalent experience may be considered.
  • Linux, VMware, automation, security, or other relevant industry certifications.

About the Company

Delaware Nation Industries

Tribal holding company, prime government contractor.

Delaware Nation Industries (DNI) acts as the economic development arm and holding company for Delaware Nation’s non-gaming subsidiaries that work with federal government clients as a prime contractor and system integrator. Its subsidiaries combine capabilities: DNI Emerging Technologies delivers cybersecurity, UAS, geospatial, R&D, and data solutions to government enterprises; Channel Blend provides campaign support and data-driven results; DNI HG, a joint venture, addresses federal data challenges with a specialized service model. The company differentiates itself by leveraging its tribal status as a governance and contracting advantage while offering a diversified, multi-domain prime contracting portfolio rather than a single service line. Its goal is to generate financial returns to ensure the Delaware Nation’s economic independence and prosperity while meeting federal partners’ missions through integrated, government-focused solutions.

Company size
11-50
Company stage
Not listed
Total funding
Not listed
Headquarters
Not listed
Founded
2019

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