Description:Senior Linux System Administrator / Systems Engineer to support a mission-critical, IC-wide service environment. This role is ideal for a hands-on professional with deep Linux expertise who enjoys working across infrastructure, virtualization, and automation technologies in secure, high-availability environments.
Multiple shift options are available, including day shifts, weekday evening or night shifts, or 12-hour weekend shifts (Saturday and Sunday).
You will play a critical role in maintaining and optimizing Linux-based systems, supporting enterprise infrastructure components, and ensuring system reliability and compliance across secure environments.
Key Responsibilities:- Administer, configure, and maintain Linux systems (CentOS/RHEL) in a production environment
- Install, configure, and support JBoss / WildFly application servers
- Build, configure, and manage VMware virtual machines, ensuring optimal performance and availability
- Support system operations within a secure, mission-driven IC environment
- Assist with automation and configuration management, including use of Ansible where applicable
- Monitor system performance and troubleshoot issues across compute, storage, and network layers
- Support security compliance, authentication mechanisms, and system hardening activities
- Perform scripting and automation tasks using shell and/or Python
- Contribute to physical server administration and infrastructure support as needed
- Collaborate with cross-functional teams to maintain system stability and meet mission requirements
Qualifications:- 10+ years of Linux administration/engineering (RHEL/CentOS) in enterprise environments
- Strong experience with JBoss/WildFly, VMware, and secure system operations
- Proficiency in scripting (Shell/Python) and troubleshooting across infrastructure stacks
- Experience supporting mission-critical systems with performance and reliability focus
- Familiarity with Ansible, storage, networking, authentication, and security compliance/hardening
- Nice to have: Linux cert, basic Oracle DBA exposure, and experience with JSON
Requirements: - U.S. Citizenship is required for all applicants.
- Certification Requirements:
This position requires an active Security Clearance with appropriate Polygraph. 
