Linux Systems Administrator

About the role

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.

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

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

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)
• 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