Systems Engineer (Mid)

Location: Quantico, VA | Security Clearance: Active TS or higher (Required) | Job Type: Full-Time

About the role

The Systems Engineer administers, supports, monitors, and troubleshoots Linux systems in production environments. This role focuses on Ubuntu Linux administration, system health and performance, network troubleshooting, virtualized or cloud-based server environments, security fundamentals, and clear infrastructure documentation.

Responsibilities

• Administer and support Linux systems in production environments.
• Support Ubuntu Linux environments.
• Apply Linux system administration concepts to maintain reliable system operations.
• Use the Linux command line and common shell utilities to perform administration and troubleshooting tasks.
• Troubleshoot complex infrastructure issues across operating systems.
• Administer and troubleshoot servers in virtualized or cloud environments.
• Support monitoring, logging, alerting, and diagnosis of system health and performance issues.
• Apply working knowledge of TCP/IP networking, DNS, DHCP, HTTP/HTTPS, SSH, routing, firewalls, and common network troubleshooting tools.
• Support system security fundamentals, including patch management, access controls, SSH security, and vulnerability remediation.
• Document infrastructure, configurations, troubleshooting procedures, and operational processes clearly.

Requirements

• 5+ years of experience administering and supporting Linux systems in production environments.
• Strong hands-on experience with Ubuntu Linux.
• Experience troubleshooting complex infrastructure issues across operating systems.
• Experience administering and troubleshooting servers in virtualized or cloud environments.
• Experience with monitoring, logging, alerting, and diagnosing system health and performance issues.

Skills

• Solid understanding of Linux system administration concepts.
• Proficiency with the Linux command line and common shell utilities.
• Working knowledge of TCP/IP networking, DNS, DHCP, HTTP/HTTPS, SSH, routing, firewalls, and common network troubleshooting tools.
• Understanding of system security fundamentals, including patch management, access controls, SSH security, and vulnerability remediation.
• Ability to document infrastructure, configurations, troubleshooting procedures, and operational processes clearly.
• Experience with Docker and containerized applications.
• Experience with Ansible or other configuration-management and automation tools.
• Experience writing Bash or other shell scripts for system administration and automation.
• Experience with infrastructure-as-code tools such as Terraform.
• Familiarity with CI/CD concepts and tools.
• Experience with cloud platforms such as AWS.
• Experience administering web servers, reverse proxies, or application infrastructure such as Nginx.
• Familiarity with databases and troubleshooting application/database connectivity.
• Familiarity with centralized logging and monitoring platforms such as Grafana and ELK.
• Experience with scripting or automation using Python.
• Exposure to high-availability, load balancing, and scalable infrastructure concepts.

Pay

Target Salary Range: $135,000 - $155,000 (depending on education, experience, certifications, and other position‑specific requirements)