Linux Systems Administrator
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Before you apply
Salary$99k – $206k
LocationSterling, VA
Work modeon-site
Typefull-time
SeniorityMid
Company size10,000+ people
PostedOct 15, 2026 · 3w ago
Verified live2d ago
At a glanceSummarised by Seekless from the posting.
Active TS/SCI with ability to pass CI Polygraph
Associate or Bachelor's degree in Computer Science, Information Technology, or related field; OR equivalent combination of technical training and hands-on experience
Proven experience in managing and maintaining Linux servers (Debian, Ubuntu, etc.)
Experience troubleshooting hardware and software issues in production environments
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
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
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
Nightwing is An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class.
Skills
Linux
Debian
Ubuntu
OpenVPN
DNS
LDAP
Apache
NGINX
TCP/IP
VPN
SaltStack
Ansible
Bash
Python
Nagios
Zabbix
Prometheus
Puppet
Chef
Docker
Kubernetes
VMware
KVM
Benefits
Health insurance
Dental insurance
Vision insurance
401(k)
PTO
Paid holidays
Training support
About the company
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.
KEY RESPONSIBILITIES
System Administration:
• 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)
Performance Monitoring and Optimization:
• 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
Security Management:
• 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
Technical Support:
• 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
Collaboration and Documentation:
• 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
REQUIREMENTS
Active TS/SCI with ability to pass CI Polygraph
Education**:**
• Associate or Bachelor’s degree in Computer Science, Information Technology, or related field; OR equivalent combination of technical training and hands-on experience
Experience:
• Proven experience in managing and maintaining Linux servers (e.g., Debian, Ubuntu)
• Experience troubleshooting hardware and software issues in production environments
Technical Skills:
• 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)
Professional Skills:
• 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
PREFERRED QUALIFICATIONS
• 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
COMPENSATION & BENEFITS
• Competitive salary
• Comprehensive health, dental, and vision insurance
• 401(k) with company match
• PTO and paid holidays
• Ongoing technical training and certification support
Salary & Benefits
The salary associated with this position ($99,000-$206,000) is commensurate with the selected candidate’s qualifications, years of relevant experience, and demonstrated level of expertise. Compensation will be determined based on these factors to ensure alignment with skills, responsibilities, and market standards.
Nightwing offers medical, vision and dental insurance coverage in addition to a 401k plan, PTO, Holidays, and additional insurances.
Legal
Nightwing is An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class.