Senior Security Systems Engineer

Job Category:
Engineering

Time Type:
Full time

Minimum Clearance Required to Start:
Secret

Employee Type:
Regular

Percentage of

Travel Required:

Up to 10%

Type of Travel:
Continental US

This position is with our Systems Integration Group. You will spend part of your time developing, debugging, and maintaining software applications while owning the full ecosystem those applications run on. This includes installation and configuration of RHEL 8 operating systems, performing cybersecurity scans and hardening (including SELinux policy work), building and maintaining utility scripts and automated build processes, and supporting the Identity Management (IdM/FreeIPA) and PKI infrastructure that underpins the environment.

You will apply strong Python and shell scripting skills to automate system builds, configuration management (Ansible), and operational tasks. You will also use your networking, virtualization (ESXi and KVM), and hardware knowledge to diagnose and resolve system issues. The role includes direct interaction with the customer to capture defect reports and enhancement requests and turn them into a prioritized backlog for future releases.

• 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
• Periodically travel onsite to integrate operational systems, apply updates, and support deployments
• Profile, analyze, and optimize legacy software and the supporting system stack
• Configure, harden, and maintain RHEL 8 systems, including SELinux policies
• Support and extend IdM/FreeIPA and PKI infrastructure
• Contribute to virtualization environments (ESXi and KVM) and associated networking

• Bachelor’s degree (or higher) in Computer Science, Computer Engineering, or a related technical field, or equivalent relevant experience
• U.S. Citizen with a minimum of a Secret security clearance with the ability to obtain a TS/SCI clearance.
• 7+ years of systems engineering or related experience
• Strong understanding of Unix/Linux systems, with solid experience on RHEL 8
• Strong Python scripting and programming skills
• Proficient with Bash/shell scripting
• Strong experience with IdM or FreeIPA
• Strong understanding of PKI concepts and practical implementation
• Proficient with networking concepts
• Basic-to-intermediate understanding of SELinux
• Proficient with Ansible for configuration management and automation
• Experience with virtualization platforms, including ESXi and KVM
• Solid understanding of software design concepts, patterns, tools, and best practices
• Basic understanding of virtualization and hypervisor configuration

• Experience with a popular CI/CD system (Git Lab Pipelines, Git Hub Actions, Jenkins, CircleCI, or similar)
• Familiarity with device boot processes (BIOS, UEFI, PXE)
• Ability to code in additional languages such as Golang, Type Script, C, or C++
• Experience with cybersecurity scanning, hardening, and secure system configuration in enclave or classified environments

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access…