A technology organization supporting a high-visibility mission environment is seeking a Senior Linux Systems Administrator/Engineer to administer and troubleshoot a CentOS/RHEL and Kubernetes-based infrastructure.
This hands-on position spans Linux hosts, Kubernetes clusters, containers, networking, storage, authentication, security controls, and physical infrastructure. The engineer will maintain the stability of an established production environment while partnering with software-development and engineering teams as the underlying system evolves into a more standardized product.
This is a broad infrastructure role. Candidates must be comfortable investigating problems across multiple technical layers rather than focusing exclusively on cloud architecture, Kubernetes configuration, or application development.
RESPONSIBILITIES- Administer and support enterprise CentOS and RHEL systems
- Operate and troubleshoot Kubernetes clusters and containerized workloads
- Diagnose issues across Linux hosts, containers, applications, networks, and storage
- Monitor system availability, performance, capacity, and reliability
- Configure and maintain authentication and access controls
- Support physical servers and virtualized infrastructure
- Perform system patching, upgrades, hardening, and configuration changes
- Develop Bash scripts to automate administrative and operational tasks
- Use configuration-management tools to maintain consistent environments
- Troubleshoot networking and storage dependencies
- Support security-compliance and remediation activities
- Work with key-management and encryption technologies
- Partner with software developers and systems engineers
- Document configurations, troubleshooting procedures, and operational processes
- Support the continued standardization and productization of the mission platform
- Participate in coverage between 6: 00 AM and 6: 00 PM, with a preferred 10: 00 AM 6: 00 PM schedule
Role Requirements:- At least 10 years of Linux systems-administration or systems-engineering experience
- Deep hands-on CentOS and RHEL administration
- Production Kubernetes experience
- Strong Kubernetes operational and troubleshooting skills
- Strong container fundamentals
- Bash scripting
- Current Security+ certification
- Extensive production-infrastructure troubleshooting
- Networking and storage knowledge
- Authentication and security-compliance experience
- Physical-server administration
- Ability to diagnose issues across multiple infrastructure layers
- Strong collaboration with software and engineering teams
- Ability to work onsite in Annapolis five days per week
- Ability to support the required daytime coverage schedule
PREFERRED EXPERIENCE- High Side or classified-networking experience
- Current or recently held SYS3 PRIVAC
- Red Hat certification
- Python
- Ansible
- Salt
- VMware
- DevOps or Agile experience
- Key-management and encryption technologies
- Advanced network or storage administration
- Experience supporting mission-critical product environment