Linux Systems Engineer & DevOps (TS/SCI) – Onsite

London Approach; Springfield (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

London Approach is seeking a Linux Systems Administrator / DevOps Engineer to support enterprise Linux infrastructure for DoD programs in a fully onsite role in Springfield, VA. The candidate will combine Linux administration with production application support, troubleshooting, automation, and DevOps responsibilities.

The ideal candidate has Top Secret/SCI clearance, hands-on experience with RHEL/Ubuntu family distributions, scripting, and automation using Ansible or similar tools, and a strong

Qualifications

• Active Top Secret clearance with SCI eligibility/access.
• Strong professional experience administering Linux systems in enterprise or production environments.
• Hands‑on experience with Linux distributions such as Red Hat Enterprise Linux (RHEL), Rocky Linux, CentOS, Ubuntu, or similar.
• System services and processes management.
• File systems and storage management.
• Permissions and user administration.
• Networking concepts and troubleshooting.
• Performance and resource utilization optimization.
• Package management and patching experience.
• Experience troubleshooting production software or application‑related issues, not solely infrastructure.
• Experience with automation or configuration management technologies such as Ansible.
• Scripting experience with Bash, Python, PowerShell, or similar languages.
• Familiarity with Git and source‑control workflows.
• Understanding of DevOps principles and modern software deployment practices.
• Strong troubleshooting and problem‑solving skills in mission‑critical environments.
• Ability to work fully onsite in Springfield, Virginia.

Responsibilities

• Administer, maintain, troubleshoot, and support enterprise Linux systems in production environments.
• Manage Linux servers including OS configuration, patching, upgrades, package management, storage, permissions, services, and system performance.
• Troubleshoot complex Linux infrastructure, OS, network, and application issues.
• Serve as an escalation point for technical support issues involving production software and applications.
• Analyze application, system, and service logs to identify root causes of production incidents.
• Work with software developers, DevOps engineers, infrastructure teams, and application owners to resolve complex technical issues.
• Support deployment, configuration, and operation of applications running within Linux environments.
• Develop and maintain automation using tools such as Ansible, Bash, Python, or similar technologies.
• Support CI/CD processes and DevOps tooling used to deploy and maintain production applications.
• Manage system services, processes, scheduled jobs, configuration files, certificates, and user access.
• Monitor system health, availability, capacity, and performance.
• Troubleshoot networking concepts including DNS, TCP/IP, routing, ports, firewalls, and connectivity.
• Support security hardening, vulnerability remediation, patching, and compliance requirements within classified environments.
• Participate in root-cause analysis and develop solutions to prevent recurring production issues.
• Create and maintain technical documentation, troubleshooting procedures, and operational runbooks.

Job description

London Approach is seeking a Linux Systems Administrator / DevOps Engineer to support enterprise Linux infrastructure for DoD programs in a fully onsite role in Springfield, VA. The candidate will combine Linux administration with production application support, troubleshooting, automation, and DevOps responsibilities.

The ideal candidate has Top Secret/SCI clearance, hands-on experience with RHEL/Ubuntu family distributions, scripting, and automation using Ansible or similar tools, and a strong