Senior Security Systems Engineer – Flexible PTO

VulnU; Austin (TX); On-site; USD 108,000 - 228,000; Full time

Benefits offered by this job

Flexible PTO

Learning budget

Job summary

CACI seeks a Senior Security Systems Engineer in Austin to own the end-to-end deployment and hardening of Linux-based systems and secure infrastructures. You will build automation (Python, Bash, Ansible), manage IdM/PKI, and ensure robust configuration management for secure enclaves.

You’ll work with virtualization (ESXi, KVM), networking, and CI/CD tooling while interfacing with customers to translate defects into actionable backlog items.

Qualifications

• Bachelor’s degree (or higher) in Computer Science, Computer Engineering, or related field, or equivalent experience.
• U.S. Citizen with a minimum Secret clearance and ability to obtain TS/SCI.
• 7+ years of systems engineering or related experience.
• Strong Unix/Linux knowledge, esp. RHEL 8.
• Proficient Python and Bash scripting.
• Experience with IdM/FreeIPA and PKI concepts.
• Proficient with Ansible for automation.
• Experience with virtualization (ESXi, KVM).
• Knowledge of CI/CD systems is a plus.

Responsibilities

• Refine and enhance existing applications to meet customer and operational requirements.
• Design, develop, and maintain automation for rapid, repeatable system builds and configuration (Ansible, Python, shell).
• Develop and maintain user and administrative documentation to satisfy contract requirements.
• Occasional travel onsite to integrate systems and support deployments.
• Profile and optimize legacy software and the supporting system stack.
• Configure, harden, and maintain RHEL 8 systems, including SELinux policies.
• Support IdM/FreeIPA and PKI infrastructure.
• Contribute to virtualization environments and related networking.

Skills

Python

Shell scripting

Ansible

Unix/Linux

Bash

Networking

Automation

Security engineering

Documentation

Troubleshooting

Education

Bachelor’s degree in Computer Science/Computer Engineering or related

Tools

RHEL 8

IdM/FreeIPA

PKI

Ansible

ESXi

KVM

GitLab/GitHub Actions/Jenkins

Job description

CACI seeks a Senior Security Systems Engineer in Austin to own the end-to-end deployment and hardening of Linux-based systems and secure infrastructures. You will build automation (Python, Bash, Ansible), manage IdM/PKI, and ensure robust configuration management for secure enclaves.

You’ll work with virtualization (ESXi, KVM), networking, and CI/CD tooling while interfacing with customers to translate defects into actionable backlog items.