Senior Systems Administrator; Unix​/Linux

Cape Fox subsidiary, Saxman One, LLC is seeking a highly skilled and motivated Senior Systems Administrator (Unix/Linux) to join our team in support of a federal government client. This position requires advanced expertise in administering and maintaining Unix and Linux-based environments, including server configuration, patch management, performance tuning, and system security. The ideal candidate will demonstrate strong technical leadership, attention to detail, and the ability to troubleshoot complex issues across diverse IT infrastructures.

The successful candidate will play a key role in ensuring system reliability, availability, and compliance with Department of Defense (DoD) cybersecurity standards, while supporting mission‑critical operations in a dynamic, fast‑paced environment. This position is contingent upon the award.
Incumbents are encouraged to apply!

The above salary range represents the company’s good faith and reasonable estimate of the range of possible compensation at the time of posting. In addition, we offer a variety of benefits, including company holidays, paid time off, health insurance, dental insurance, vision insurance, life and disability insurance, tuition reimbursement, as well as a 401K with company match. This job will be posted until filled or withdrawn.

• Provide comprehensive system administration, configuration, and maintenance for servers, endpoints, and operating systems, including Windows, Linux, UNIX, macOS, Android, and iOS
• Configure, patch, and upgrade operating systems, applications, and associated hardware to maintain optimal performance and ensure compliance with cybersecurity requirements
• Perform database tuning, monitoring, and security, along with upgrades and software installations, to ensure reliability, scalability, and data integrity
• Migrate existing databases and applications across different hardware platforms and operating systems, ensuring minimal downtime and full data preservation
• Manage user accounts, permissions, and access controls to safeguard information systems and enforce least‑privilege principles
• Conduct system performance monitoring, diagnostics, and capacity planning to ensure availability and responsiveness of critical systems
• Implement and maintain backup, recovery, and continuity of operations (COOP) procedures to protect mission‑critical data and systems
• Support installation, configuration, and administration of virtualization platforms (e.g., VMware, Hyper‑V) and cloud‑hosted systems
• Collaborate with cybersecurity personnel to apply DISA STIGs, perform vulnerability scans, and remediate findings per RMF and DoD security directives
• Ensure full compliance with DoD/Navy accreditation and authorization (A&A) standards and policies
• Monitor system logs, alerts, and performance metrics; identify issues and perform root‑cause analysis to prevent recurrence
• Provide expert technical support and troubleshooting for system outages, application failures, and network connectivity issues
• Prepare and maintain system documentation, configuration baselines, SOPs, and change control records in approved ITSM tools (e.g., Service Now, Remedy)
• Participate in Change Control Board (CCB) and Configuration Management (CM) meetings to plan and coordinate upgrades, patches, and technical changes
• Assist in integration of new technologies, digital modernization efforts, and infrastructure automation initiatives
• Oversee hardware lifecycle management, including server refresh, decommissioning, and component replacement planning
• Provide training and mentoring to junior administrators and technical staff to promote knowledge transfer and operational consistency

0 % – 10 %

• Six (6) years of professional experience in Unix and/or Linux system administration of networks and software systems
• Experience in system backup and recovery; basic software management; security management and library management; installation and configuration of hardware; operational systems and COTS software; operating computer systems in different operating environments; and sizing, performance, tuning, hardware/software/network trouble shooting, and resource allocation
• Qualified experience in different network protocols, including TCP/IP, and major network security tools such as firewalls, knowledge of computing and networking vulnerabilities, attack methods, and latest detection methods
• Proficiency with network protocols (e.g., TCP/IP), system security tools, and scripting languages is often required
• Must hold a Master’s degree in Electrical/Electronic/Computer Engineering, Computer Science, or Information Systems
• Must have Information Assurance Technical Level III certification
• Must hold an active Top Secret clearance
• Must have authorization to work in the United States as defined by the Immigration Reform Act of 1986

Information Technology