Linux Systems Administrator

Nightwing•Sterling, VA

2d•$99,000 - $206,000

About The Position

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers’ most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in the intelligence community, defense, civil, and commercial markets. Roka Security is seeking a qualified Linux Systems Administrator to work with a close-knit team in a fast-paced, collaborative environment. This position will be responsible for IT administration for servers and systems all over the world supporting highly secure complex networks, system and network performance tuning, physical server deployments, and disaster recovery. The ideal candidate can work across the Linux, networking, and security worlds with strong experience in OSPF and Linux routing. This role requires a security-minded individual who is detail-oriented, skilled at making data-driven decisions to proactively address issues before they impact end users and always thinking about how to improve current technology and systems.

Requirements

Associate or Bachelor's degree in Computer Science, Information Technology, or related field; OR equivalent combination of technical training and hands-on experience
Directly relevant experience as a Linux System Administrator
Proven experience in managing and maintaining Linux servers (e.g., Debian, Ubuntu)
Experience troubleshooting hardware and software issues in production environments
Linux: Proficiency in managing and maintaining Linux servers (Debian, Ubuntu, etc.)
Strong understanding of Linux file systems, permissions, and security
Command line proficiency, system administration, log analysis, package management
Networking: Strong knowledge of networking concepts and protocols (TCP/IP, DNS, VPN, etc.)
Understanding of network security concepts and best practices
Configuration management experience (e.g., SaltStack, Ansible)
Excellent problem-solving and analytical skills
Strong communication and interpersonal skills
Self-motivated with ability to work independently and manage time effectively
Detail-oriented with strong documentation habits
Team player with positive attitude and willingness to learn
Comfortable working in fast-paced environments with competing priorities

Nice To Haves

Certifications: Linux+ | RHCSA/RHCE | CompTIA Security+ | Network+
Experience with shell scripting (Bash, Python, etc.) for automation and task management
Familiarity with monitoring tools (Nagios, Zabbix, Prometheus, etc.)
Experience with configuration management tools (Ansible, Puppet, Chef, Salt)
Knowledge of containerization (Docker, Kubernetes)
Experience with backup and disaster recovery solutions
Familiarity with virtualization technologies (VMware, KVM, or similar)
Previous experience supporting government or DoD customers
Experience in managed service provider environments

Responsibilities

Conduct day-to-day operations of customer networks including installation, configuration, and maintenance of Linux operating systems (e.g., Debian, Ubuntu)
Manage and maintain Linux servers ensuring optimal performance and availability
Configure and maintain Linux file systems, permissions, and security settings
Setup and operation of Linux services (e.g., OpenVPN, DNS, LDAP, e-mail, file services, Apache/NGINX)
Monitor system performance, troubleshoot issues, and optimize system resources to ensure maximum uptime and efficiency
Analyze system logs, performance metrics, and resource utilization to identify root causes
Conduct preventive maintenance and health checks on deployed systems
Validate and test system performance and connectivity
Implement and maintain security measures to protect systems from vulnerabilities, unauthorized access, and malware threats
Manage the patching process for Linux servers
Ensure compliance with patch management policies and procedures
Perform security hardening on Linux systems
Provide technical support and troubleshooting assistance to internal users and teams regarding Linux-related issues
Diagnose problems in a timely manner to minimize downtime and disruptions
Collaborate with cross-functional teams to support project initiatives and resolve technical issues
Document system configurations, procedures, and troubleshooting steps for knowledge sharing and training purposes
Document all service activities, configurations, and resolutions in ticketing systems
Contribute to knowledge base articles and best practices documentation