Senior Systems Administrator (Unix/Linux)

Astrion; Dahlgren (VA); On-site; USD 130,000 - 140,600; Full time

Job summary

Astrion in Dahlgren, Virginia, seeks a Senior Systems Administrator (Unix/Linux) to lead secure, high-availability UNIX/Linux environments for NSWCDD Dahlgren.

This full-time role requires 6+ years of experience, a Top Secret clearance (IAT III, T5), and strong expertise in networking, backups, and security.

You will deploy hardware, integrate COTS software, and optimize systems for performance and resilience.

Qualifications

• Six+ years of Unix/Linux system administration experience.
• Experience with backup/recovery, hardware/software installation, and performance tuning.
• Knowledge of TCP/IP networks and firewall security tools.
• IAT III level with a T5 clearance.

Responsibilities

• Oversee the administration, configuration, and security of Unix/Linux environments.
• Manage lifecycle infrastructure, hardware deployment, and COTS software integration.
• Optimize multi-environment systems for resource efficiency and security.
• Ensure resilience against vulnerabilities through proactive monitoring.

Skills

Unix/Linux system administration

Backup and recovery

Network security

TCP/IP

Security clearance

Education

Master's degree

Job description

Senior Systems Administrator (Unix/Linux)

Job Location: Dahlgren, Virginia

Job Status: Full Time

Clearance: Top Secret

Travel: Less than 10%

Salary: $130,000 to $140,600

Astrion has a contingent opening for a Senior 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 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, 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 environments; and sizing, performance, tuning, hardware/software/network troubleshooting 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, and latest detection methods.
• This position is required to be designated as IAT III level with a T5.

Preferred Qualifications / Skills

• Master's level degree in Electrical/Electronic/Computer Engineering, Computer Science, or Information Systems.
• CompTIA Security+, CompTIA CySA+, or CCNA.