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CACI International Linux Systems Engineer III – Network Security Tools in Springfield, Virginia

Linux Systems Engineer III – Network Security Tools

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

Network Defense is at the forefront of integrating advanced Linux systems into our cybersecurity framework. We are seeking a Linux Systems Engineer who is deeply passionate about leveraging their technical expertise to enhance our cybersecurity capabilities. This role is ideal for someone who thrives in a collaborative environment where their skills directly contribute to strengthening our digital defenses.

What You’ll Get to Do:

As a Network Defense Linux Systems Engineer, you will play a crucial role in maintaining and enhancing the security and efficiency of our Linux-based systems. Your expertise in Linux, combined with a keen interest in cybersecurity, will be instrumental in supporting our mission to safeguard our digital assets.

More About the Role

  • Design and implement shell scripts to automate system maintenance tasks, enhancing efficiency and reliability.

  • Configure and manage system logging, including remote logging, to facilitate thorough log analysis for troubleshooting and security monitoring.

  • Establish and maintain networking services, including firewall configurations and SELinux policies, to ensure secure and optimized system performance.

  • Utilize partitions and logical volumes to configure local storage solutions tailored to specific project requirements.

  • Deploy, configure, and maintain systems, ensuring software installations, updates, and core services are managed effectively.

  • Apply a solid understanding of networking protocols (DNS, SMTP, DHCP) and utilize network troubleshooting tools (e.g. tcpdump, Traceroute, Ping, Netstat, nslookup) to diagnose and resolve issues.

You’ll Bring These Qualifications

  • DOD 8570 IAT II and CSSP Infrastructure Support certifications.

  • Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, or Electrical Engineering.

  • 6+ years of related experience in SEIM, network operations, network engineering, leading technology teams, leading operation cybersecurity teams, or a combination thereof.

  • Proven experience in Linux system administration, with a strong background in shell scripting and system automation.

  • Expertise in configuring system logging, analyzing logs for troubleshooting, and implementing secure networking services.

  • Familiarity with AWS services such as EC2, S3, CloudFormation, and Terraform is advantageous.

  • Experience with automation tools like Ansible and version control systems such as GitHub/GitLab for script and code management.

  • A proactive approach to system optimization and a continuous learning mindset to stay updated with the latest in Linux systems and cybersecurity.

  • Excellent collaboration skills, with the ability to work effectively across teams to achieve system-related goals.

What We Can Offer You:

  • We’ve been named a Best Place to Work by the Washington Post.

  • Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives.

  • We offer competitive benefits and learning and development opportunities.

  • We are mission-oriented and ever-vigilant in aligning our solutions with the nation’s highest priorities.

  • For over 60 years, the principles of CACI’s unique, character-based culture have been the driving force behind our success.

Company Overview:

CACI is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other protected characteristic.

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. Learn more here (

The proposed salary range for this position is:

$85,800 - $180,200