Senior Linux SysAdmin TS/SCI Cloud & Space Infra

CACI International Inc

Sterling (VA)

On-site

USD 104,000 - 218,000

Full time

5 days ago

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Job summary

CA CI International Inc. is seeking a Linux Systems Administrator to support mission-critical environments in Sterling, VA. This role focuses on secure, scalable infrastructure across cloud and bare-metal systems, with containerized environments and CI/CD integration.

You will work on-site at a CACI facility in Sterling, VA, applying patches, upgrading OS, and ensuring compliance with government IT policies while collaborating with DevSecOps teams and cross-functional stakeholders.

Qualifications

Bachelor’s degree in Computer Science, Information Technology, or related field of study.
Active TS/SCI security clearance with polygraph.
7+ years of experience in infrastructure, network architecture, and development environments.
Proven experience with Linux system administration.
Experience with Development/Test and Production Environments.
Strong analytical and investigative skills to understand and resolve complex problems.
Familiarity in information security and compliance with government policies.
Proficiency in cloud platforms.
Strong knowledge of network protocols and security (TCP/IP, VPN, firewalls).
Experience with CI/CD tools and version control systems (Git).
Certifications in cloud services (AWS, Azure, Google Cloud) highly desired.
Active CISSP or Security+ certification or comparable.

Responsibilities

Ensure optimal performance, scalability, and security of all infrastructure environments.
Perform Linux system administration and support multi‑environment infrastructure (Dev/Test/Prod).
Apply security patches, OS upgrades, and maintain system integrity and compliance.
Design, configure, and maintain LAN/WAN/VPN network infrastructure.
Monitor network performance, troubleshoot issues, and collaborate with external COMMS teams.
Manage containerized environments and automated infrastructure (Docker, Kubernetes, Ansible, Puppet).
Create, manage, and automate cloud and virtual machine infrastructure via repeatable scripts and automation playbooks.
Troubleshoot issues involving servers, user systems, storage, and network connectivity.
Ensure compliance with government IT and security policies, including cross‑security domain requirements.
Collaborate with architects, technical leads, developers, testers, security teams, and other program stakeholders.
Support new infrastructure projects involving microservices, containers, and cloud‑native architectures.