Systems Administrator (Linux/Automation Focus)

KBR, Inc.•Niceville, FL

1d•$120,000 - $170,000

About The Position

KBR is seeking a Senior Linux Systems Administrator with an emphasis on automation and orchestration to join their 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.

Requirements

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

Nice To Haves

Experience with container engines and orchestration platforms (Docker, Podman, Kubernetes, or Red Hat OpenShift).
Experience deploying and operating Red Hat Satellite / Capsule servers or automated Kickstart workflows.
Experience hardening Linux environments using SCAP tools, applying DISA STIGs, and working within DoD RMF-accredited enclaves.
Working knowledge of ACAS/Nessus vulnerability scanners and Trellix (HBSS/EPO) Linux agents.
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+).
Familiarity with Layer 2/3 networking, firewall operations, and DoD networks including DREN and SDREN.
Experience supporting Windows Server environments (Active Directory, Group Policy, DNS, PKI) in a hybrid enterprise.

Responsibilities

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