Senior Linux Engineer - Hybrid (DoD Secret Clearance)

CACI International Inc; Chantilly (VA); Hybrid; USD 104,000 - 218,000; Full time

Job summary

CACI International Inc. is seeking a Senior Linux Engineer to design, implement, and maintain large-scale Linux infrastructures.

The role blends hands-on engineering with mentoring and cross-team collaboration in a hybrid environment with onsite requirements in Chantilly, VA. The position requires US citizenship, a DoD Secret clearance, and 12+ years of relevant experience (or a degree with 5 years substituted).

Qualifications

• US Citizenship required; Active DoD Secret clearance.
• 12+ years of relevant experience or substituted by degree with 5 years replaced.
• Security+ CE (or IAT Level II/III) plus RHCE or LPIC-3 certification.
• Hands-on Linux administration and cross-platform experience including Windows Server.

Responsibilities

• Design, implement, and manage complex Linux-based systems and infrastructure.
• Develop and maintain automation scripts and tools; mentor junior team members.
• Ensure cyber security best practices; perform capacity planning and performance tuning.
• Manage disaster recovery, incident response, and cross-team collaboration.
• Lead system upgrades, patches, and troubleshooting; ensure data integrity and security.

Skills

Linux system administration

Windows Server administration

Cyber security practices

Mentoring / team lead

Capacity planning

Education

Bachelor's Degree in applicable field

Tools

Security+ CE Certification

RHCE

LPIC-3

SE Linux / CentOS / AlmaLinux / Rocky Linux

VM environments

Job description

CACI International Inc. is seeking a Senior Linux Engineer to design, implement, and maintain large-scale Linux infrastructures.

The role blends hands-on engineering with mentoring and cross-team collaboration in a hybrid environment with onsite requirements in Chantilly, VA. The position requires US citizenship, a DoD Secret clearance, and 12+ years of relevant experience (or a degree with 5 years substituted).