Linux Systems Engineer

Job Title:

Linux Systems Engineer

Job Category:
Information Technology

Time Type:
Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type:
Regular

Percentage of

Travel Required:

Up to 10%

Type of Travel:
Local

* * *

The Linux Systems Engineer will function as part of a team of engineers responsible for designing, building, maintaining, and securing Linux-based systems to ensure reliability, performance, and security across in our secure environments.

• 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 seamless integration and high availability of systems
• Maintain documentation related to system configurations, troubleshooting processes, and operational procedures
• Support users and administrators by providing technical guidance and resolving Linux-related issues
• Manage critical infrastructure services (e.g., DNS, DHCP, LDAP, NTP, mail relays) 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, security audits, and enforce access controls using SELinux or similar tools
• Perform root‑cause analysis for complex issues involving networking, storage, or application performance
• Basic Cisco networking management

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

• Strong understanding of Linux operating systems, distributions, file systems, kernel concepts, and system architecture
• Proficiency in Linux system administration, including installation, configuration, maintenance, performance tuning, and troubleshooting
• Ability to design, configure, and test Linux servers and operating systems
• Advanced scripting skills (Bash, Python, Perl) for automation and system efficiency
• Experience with configuration management tools such as Ansible, Puppet, Chef, or similar platforms
• Solid knowledge of networking protocols, services, and security hardening (DNS, DHCP, firewalls, routing, etc.)
• Familiarity with cloud platforms (AWS, Azure, GCP) and hybrid infrastructure environments
• Ability to monitor and maintain system health, performance, and security events across Linux environments

• Implementing security measures, patching, vulnerability remediation, and systems hardening.
• Experience working within compliance frameworks and audit‑ready environments.

• A culture of integrity.
• At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.
• An environment of trust.
• CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
• A focus on continuous…