Senior InfoSec Systems Engineer (Linux/Windows)

L3Harris Technologies, Inc.; Waco (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

L3Harris Technologies is seeking an Information Security Systems Engineer 5 to own Linux and Windows infrastructure in Waco’s secure lab and air-gap environments. You will provision, secure, operate, and document systems supporting US Government programs.

The role requires strong experience with Red Hat Linux, Windows Server, Active Directory, and security hardening, plus collaboration with program teams and security stakeholders to maintain STIG baselines and continuous monitoring.

Qualifications

• Bachelor’s Degree in Computer Science, Information Technology, or related field with minimum 9 years of experience.
• Graduate Degree in Computer Science, Information Technology, or related field with at least 7 years of experience.
• In lieu of a degree, minimum of 13 years of related systems administration experience.

Responsibilities

• Administer Red Hat-based Linux and Windows Server environments in secure lab and air-gap settings.
• Provision, patch, manage privileges, and handle identity services across Windows and Linux.
• Support secure development infrastructure, including access control and standardized images.
• Harden and audit systems per security guidance; implement STIG baselines and patching.
• Maintain asset and service inventories, diagrams, SOPs, and audit artifacts.
• Provide on-site incident response and coordination for outages and vulnerabilities.

Skills

Linux administration

Windows administration

Active Directory

Shell scripting

Network services

Storage services

System hardening

Secure environments support

Education

Bachelor’s Degree in Computer Science, Information Technology, or a related field

Graduate Degree in Computer Science, Information Technology, or a related field

Tools

Ansible

AWX

Puppet

Chef

Active Directory

FreeIPA

LDAP

Kerberos

GitLab

GitHub

SVN

Job description

L3Harris Technologies is seeking an Information Security Systems Engineer 5 to own Linux and Windows infrastructure in Waco’s secure lab and air-gap environments. You will provision, secure, operate, and document systems supporting US Government programs.

The role requires strong experience with Red Hat Linux, Windows Server, Active Directory, and security hardening, plus collaboration with program teams and security stakeholders to maintain STIG baselines and continuous monitoring.