Systems Administrator; Linux​/Automation Focus

Systems Administrator (Linux / Automation Focus)

Systems Administrator (Linux / Automation Focus)

Systems Administrator (Linux / Automation Focus)

K  is seeking a Senior Linux Systems Administrator with an emphasis on automation and orchestration to join our team.

The successful candidate will provide systems administration and infrastructure automation support to the Test Resource Management Center’s (TRMC) All Domain Test Range (ADTR) and INDOPACOM Pacific-Rim Multi-Domain Training and Experimentation Capability Team, Joint Mission Environment Test Capability (JMETC) Secret Network (JSN) Node, JMETC Multiple Independent Levels of Security Network (JMN) Node, Secret Defense Research and Engineering Network (SDREN), and Defense Research and Engineering Network (DREN).

You will design, deploy, and maintain robust Linux-centric server architectures, streamline configuration management using Ansible, and ensure full compliance with DISA STIGs and DoD Risk Management Framework (RMF) standards across distributed test networks.

• Linux Engineering & Administration:
  Install, configure, optimize, and maintain enterprise Linux distributions (RHEL, Rocky, CentOS) and associated core services across bare-metal and virtualized environments.
• Configuration Management & Automation:
  Develop, test, and maintain reusable Ansible playbooks, roles, and collections to automate baseline provisioning, system hardening, recurring patching cycles, and configuration drift remediation.
• Containerization & Orchestration:
  Support containerized environments using Docker, Podman, and Kubernetes, ensuring seamless workload deployment and lifecycle management.
• Security & STIG Automation:
  Automate the implementation and audit verification of DISA STIGs across Linux operating systems and application stacks; remediate vulnerability findings identified via ACAS/Nessus.
• Lifecycle & Repository Management:
  Manage software repositories, system updates, and image baselines utilizing enterprise tools such as Red Hat Satellite, Foreman, or equivalent local mirrors.
• Cross-Platform Infrastructure Support:
  Administer supporting virtualization (VMware vSphere/vCenter), storage systems, networking hardware, and secondary Windows services within a heterogeneous environment.
• Compliance & Monitoring:
  Maintain compliance with TRMC cybersecurity directives, RMF continuous monitoring policies, HBSS/Trellix agent deployments, and centralized logging/syslog infrastructure.
• Documentation & Operations:
  Author clear Standard Operating Procedures (SOPs), Ansible execution guides, and architecture/network diagrams to facilitate team knowledge transfer.

• Security Clearance:
  Must have an active Top Secret clearance.
• Experience:
  
  Minimum of 10 years of experience in a Systems Administrator or Systems Engineering role.
• Education:
  
  Technical Bachelor’s degree (relevant professional experience may be substituted in lieu of a degree).
• Linux Proficiency:
  In-depth knowledge of Enterprise Linux (RHEL 7/8/9) system architecture, storage management (LVM), systemd, firewalld, SELinux policies, and Bash/shell scripting.
• Automation Tooling:
  Hands‑on experience developing, testing, and debugging production Ansible playbooks, inventory structures, and automation workflows.
• Virtualization:
  Proven experience administering virtualization platforms, preferably VMware environments (vSphere, vCenter, vDS, NSX).
• Physical & Travel Requirements:
  Ability to lift up to 35 lbs; willing to travel up to 20%.

• Container Platforms:
  Experience with container engines and orchestration platforms (Docker, Podman, Kubernetes, or Red Hat Open Shift).
• Patch & Node Management:
  Experience deploying and operating Red Hat Satellite / Capsule servers or automated Kickstart workflows.
• DoD Security Compliance:
  Experience hardening Linux environments using SCAP tools, applying DISA STIGs, and working within DoD RMF-accredited enclaves.
• Cybersecurity Tools:
  Working knowledge of ACAS/Nessus vulnerability scanners and Trellix (HBSS/EPO) Linux agents.
• Certifications:
  
  Current DoD 8570/8140-compliant baseline certification (e.g., CompTIA Security+, CASP+, or CISSP) and a Linux Computing Environment certification (e.g., RHCSA, RHCE, or Linux+).
• Networking & DoD WANs:
  Familiarity with Layer 2/3 networking, firewall operations, and DoD networks including DREN and SDREN.
• Mixed OS Knowledge:
  Experience supporting Windows Server environments (Active Directory, Group Policy, DNS, PKI) in a hybrid…