Senior Security Systems Engineer

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

# Senior Security Systems EngineerCACI · caci.comCategory: Security EngineeringLocation: Austin, TX, USLevel: SeniorSalary: $108,400 – $227,500Clearance: TS/SCI (ability to obtain)## Quality of lifeWhat the posting states. Hover or tap a perk to see the line it came from.* Flexible PTO* Learning budgetJob Title: Senior Security Systems EngineerJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Continental US\\* \\* \\*The OpportunityThis 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.ResponsibilitiesRefine and enhance existing applications to meet customer and operational requirementsDesign, develop, and maintain automation for rapid, repeatable system builds and configuration (Ansible, Python, shell)Develop and maintain user and administrative documentation to satisfy contract requirementsPeriodically travel onsite to integrate operational systems, apply updates, and support deploymentsProfile, analyze, and optimize legacy software and the supporting system stackConfigure, harden, and maintain RHEL 8 systems, including SELinux policiesSupport and extend IdM/FreeIPA and PKI infrastructureContribute to virtualization environments (ESXi and KVM) and associated networkingQualificationsRequiredBachelor’s degree (or higher) in Computer Science, Computer Engineering, or a related technical field, or equivalent relevant experienceU.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 experienceStrong understanding of Unix/Linux systems, with solid experience on RHEL 8Strong Python scripting and programming skillsProficient with Bash/shell scriptingStrong experience with IdM or FreeIPAStrong understanding of PKI concepts and practical implementationProficient with networking conceptsBasic-to-intermediate understanding of SELinuxProficient with Ansible for configuration management and automationExperience with virtualization platforms, including ESXi and KVMSolid understanding of software design concepts, patterns, tools, and best practicesBasic understanding of virtualization and hypervisor configurationDesiredExperience with a popular CI/CD system (GitLab Pipelines, GitHub Actions, Jenkins, CircleCI, or similar)Familiarity with device boot processes (BIOS, UEFI, PXE)Ability to code in additional languages such as Golang, TypeScript, C, or CExperience with cybersecurity scanning, hardening, and secure system configuration in enclave or classified environments-What You Can Expect: A culture of integrity.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.An environment of trust.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 to robust learning resources to make your ambitions a reality.A focus on continuous growth.Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.Pay Range:There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.The proposed salary range for this position is:$108,400 - 227,500 USDCACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.