Linux System Administrator (TS/SCI)

About the role

CACI's National Mission Systems (NMS) group is looking for a Linux Systems Administrator to support mission-critical environments with secure, reliable and scalable infrastructure across cloud and bare-metal systems. The role sits at the heart of a secure, resilient ground infrastructure housing space-based applications, working on-site at the CACI facility in Sterling, VA. It requires a TS/SCI clearance with polygraph and is contingent on funding.

Key responsibilities

• Keep infrastructure environments performing well, scalable and secure, and administer Linux systems across Dev/Test/Prod environments
• Apply security patches and OS upgrades, and maintain system integrity and compliance
• Design, configure and maintain LAN/WAN/VPN networks, monitor performance and troubleshoot issues
• Support hardware deployments, installations and configuration
• Support CI/CD pipelines and work with DevSecOps teams
• Manage containerized environments and automation (Docker, Kubernetes, Ansible, Puppet)
• Automate cloud and VM infrastructure with scripts and playbooks
• Troubleshoot servers, user systems, storage and network connectivity
• Ensure compliance with government IT and security policies, and work with architects, developers, testers and security teams
• Support projects involving microservices, containers and cloud-native architectures, and keep configuration documentation

Required profile

• Active TS/SCI security clearance with polygraph
• Bachelor's degree in Computer Science, Information Technology or a related field
• 7+ years of experience in infrastructure, network architecture and development environments
• Proven Linux system administration experience and familiarity with Dev/Test and Production environments
• Familiarity with information security and compliance with government policies

Required skills

• Linux system administration and strong knowledge of TCP/IP, VPN and firewalls
• CI/CD tools and Git
• Cloud platforms (AWS, Azure, Google Cloud); cloud certifications highly desired
• Active CISSP or Security+ certification (comparable ones may be considered)
• Desired: Puppet, Satellite, IPA, Nagios, NetApp, DevOps tools, customer support experience and subject-matter expertise

What we offer

• Proposed pay range of $103,800 - $218,100, depending on location, experience and skills
• Healthcare, wellness, financial, retirement, family support, continuing education and time-off benefits
• Flexible time off and learning resources