Linux Systems Engineer – TS/SCI | Flexible Time Off

CACI International Inc.; Sterling (VA); On-site; USD 104,000 - 218,000; Full time

Benefits offered by this job

Flexible time off

Learning resources

Job summary

CACI International Inc. in Sterling, VA is seeking a Linux Systems Engineer to design, build, and secure Linux-based infrastructures across physical, virtual, and cloud environments.

You will install and maintain Linux servers, monitor performance and security, develop automation scripts in Bash or Python, and deploy containerization with Docker and Kubernetes. The role requires a current TS/SCI clearance with polygraph and a bachelor’s degree with at least seven years of related experience.

Qualifications

• Typically requires bachelor’s degree or equivalent, and at least 7 years of related experience.
• Must have a current TS/SCI security clearance with polygraph
• CCNA (desirable)

Responsibilities

• Install, configure, and maintain Linux operating systems and servers
• Monitor system performance, reliability, and security; respond to alerts proactively
• Troubleshoot system, application, hardware, and network-related issues on Linux platforms
• Develop and maintain automation scripts using Bash, Python, or similar languages to streamline tasks
• Perform regular updates, patching, and system hardening to maintain security posture
• Implement backup, recovery, and disaster‑recovery procedures for Linux environments
• Collaborate with network engineers and other infrastructure teams to ensure high availability
• Maintain documentation related to system configurations, troubleshooting processes, and operational procedures
• Support users and administrators by providing technical guidance
• Manage critical infrastructure services (DNS, DHCP, LDAP, NTP) within Linux environment
• Architect and maintain scalable, highly available Linux infrastructures across physical, virtual, and cloud environments
• Deploy and manage containerization and orchestration solutions such as Docker and Kubernetes
• Conduct vulnerability scanning and security audits; enforce access controls with SELinux

Skills

Linux administration

Bash scripting

Python scripting

Automation

Networking basics

Security hardening

Cloud platforms (AWS/Azure/GCP)

Containerization (Docker, Kubernetes)

Documentation

Security clearance TS/SCI with poly

Education

Bachelor's degree or equivalent

Tools

Ansible

Puppet

Chef

Docker

Kubernetes

Terraform

SELinux

Job description

CACI International Inc. in Sterling, VA is seeking a Linux Systems Engineer to design, build, and secure Linux-based infrastructures across physical, virtual, and cloud environments.

You will install and maintain Linux servers, monitor performance and security, develop automation scripts in Bash or Python, and deploy containerization with Docker and Kubernetes. The role requires a current TS/SCI clearance with polygraph and a bachelor’s degree with at least seven years of related experience.