Senior Principal Systems Administrator — DoD-Cleared, Onsite

RTX; El Segundo (CA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Relocation assistance

Job summary

RTX is seeking a Systems Administrator to join our onsite team in El Segundo, CA. The role supports classified IT infrastructures and requires an active DoD Secret clearance. You will manage servers, storage, access, backups, and workstation support in a multi-platform environment.

Responsibilities include installing/configuring infrastructure, mentoring junior admins, and ensuring 24x7 operations in a high-security setting. DoD RMF familiarity and readiness for after-hours work are expected.

Qualifications

• Experience using Linux, Windows Servers, and virtualization technologies.
• Typically requires a University Degree or equivalent experience and minimum 8 years prior relevant experience, or an Advanced Degree in a related field with minimum 5 years experience.
• U.S. Citizen and ability to obtain/maintain a DoD Secret clearance; clearance required after day 1.
• Must obtain DoDD 8140/8570 Certification (CompTIA Security+ CE or equivalent) in a reasonable time.

Responsibilities

• Provide IT systems administration in a heterogeneous RedHat Enterprise/Microsoft Windows environment.
• Lead and coordinate infrastructure installation and configuration.
• Collaborate with teams and mentor junior admins.
• Manage servers, storage, access, backups, and workstation support for classified programs.

Skills

Linux

Windows Server

Virtualization

Education

University Degree or equivalent

Advanced Degree in related field

Tools

Red Hat Enterprise Linux

Job description

RTX is seeking a Systems Administrator to join our onsite team in El Segundo, CA. The role supports classified IT infrastructures and requires an active DoD Secret clearance. You will manage servers, storage, access, backups, and workstation support in a multi-platform environment.

Responsibilities include installing/configuring infrastructure, mentoring junior admins, and ensuring 24x7 operations in a high-security setting. DoD RMF familiarity and readiness for after-hours work are expected.