Principal Linux System Administrator

SciTec, a wholly owned subsidiary of Firefly Aerospace, is a dynamic non-traditional defense contractor that delivers advanced technologies in support of U.S. National Security and Defense. For the past forty-five plus years, we have supported Department of Defense customers by developing innovative remote sensing algorithms, tools, and techniques to deliver world-class data exploitation capabilities supporting missile defense; intelligence, surveillance, & reconnaissance; space domain awareness; and aircraft survivability missions.

Important Notice: SciTec exclusively works on U.S. government contracts that require U.S. citizenship for all employees. Applicants that do not meet this requirement will not be considered.

SciTec has an immediate opportunity for a talented engineer to support our programs delivering Next-Generation Missile Warning software. This is a unique opportunity to join a business delivering core capabilities for National defense. You will work within a fast-paced team delivering end-to-end software processing of Overhead Persistent InfraRed (OPIR) sensor data for Missile Warning, Missile Defense, Battlespace Awareness, and Technical Intelligence.

We are seeking a skilled Linux System Administrator to support the installation, configuration, security, and ongoing operation of Linux- and Windows-based systems in a secure, mission-focused environment. The ideal candidate is hands-on, detail-oriented, and comfortable working across infrastructure, security, and operations teams.

Responsibilities

• Serve as the technical team lead for the System Administrator group, providing mentorship, guidance, and oversight to ensure consistent operational excellence
• Install, configure, and maintain Red Hat Enterprise Linux (RHEL) workstations and servers in accordance with defined baselines
• Implement and maintain system security, hardening, integrity monitoring, backups, and auditing i.e. STIG, SCAP
• Perform patch and package management, including installation and maintenance of third-party software i.e. IDEs, Pypi, Docker registry,
• Monitor system performance, availability, and health; troubleshoot and resolve hardware and software issues,
• Support and maintain virtualized and workstation environments (e.g., VMware)
• Install, configure, and troubleshoot servers, switches, and storage systems
• Configure and support networking in mixed Linux and Windows environments
• Document system configurations, procedures, and changes in accordance with policies and requirements
• Collaborate effectively with team members, security personnel, and end users
• Provide technical support and respond to operational issues through resolution
• Participate in continuous improvement, automation, and modernization efforts
• Perform other duties as assigned