Senior Systems Administrator (Unix/Linux) with Security Clearance

Astrion; Dahlgren (VA); On-site; USD 130,000 - 145,000; Full time

Job summary

Astrion seeks a Senior Systems Administrator (Unix/Linux) to oversee Unix/Linux environments for NSWCDD at Dahlgren, VA. The role focuses on administration, configuration, and security across multi-environment systems, ensuring resilience and secure operations.

Required 6+ years of Unix/Linux experience, familiarity with network security tools, and active Top Secret clearance. Master’s degree preferred; CCNA/Security+ or CySA+ valued.

Qualifications

• 6+ years of Unix and/or Linux system administration experience.
• Experience in backup/recovery, security management, hardware installation, and performance tuning.
• Familiarity with TCP/IP and common network security tools; vulnerability awareness.

Responsibilities

• Oversee administration, configuration, and security of Unix/Linux environments and software systems.
• Maintain system resilience through lifecycle infrastructure management and resource optimization.
• Work to secure environments against modern vulnerabilities and attacks while supporting multi-environment systems.

Skills

Unix/Linux system administration

Network security awareness

Troubleshooting and system tuning

Education

Master’s degree in Electrical/Electronic/Computer Engineering, CS or Information Systems

Tools

TCP/IP

Firewalls & security tools

COTS software installation & configuration

Job description

Overview Senior Systems Administrator (Unix/Linux) JOB LOCATION: Dahlgren, Virginia JOB STATUS: Full Time CLEARANCE: Top Secret TRAVEL: less than 10% SALARY: $130k - $145k Astrion has a contingent opening for a S enior Systems Administrator (Unix/Linux) supporting the U.S. Navy\'s Naval Surface Warfare Center Dahlgren Division (NSWCDD), located in Dahlgren, VA. As a Senior Systems Administrator (Unix/Linux) you will oversee the administration, configuration, and security of Unix and/or Linux network environments and software systems. This role maintains system resilience through lifecycle infrastructure management , handling everything from hardware deployment and COTS software integration to advanced network optimization and security administration. Operating at the highest tier of technical trust, the you will work to secure environments against modern vulnerabilities and attacks while optimizing multi-environment systems for maximum resource efficiency.

REQUIRED QUALIFICATIONS / SKILLS

• 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, attach methods and latest detection methods.
• This position is required to be designated as IAT III level with a T5 .
• Applicants must have an active TOP SECRET clearance PREFERRED QUALIFICATIONS / SKILLS
• Master's level degree in Electrical/Electronic/Computer Engineering, Computer Science, or Information Systems.
• CompTIA Security+, CompTIA CySA +, or CCNA #CJ