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Cyber Security Engineer - NSS Tools

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: CACI International Inc
Full Time position
Listed on 2026-07-03
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Systems Administrator, Unix/Linux
Salary/Wage Range or Industry Benchmark: 75200 - 158100 USD Yearly USD 75200.00 158100.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

Job Title:

Cyber Security Engineer – NSS Tools

Job Category:
Information Technology

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

The Opportunity

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.

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.

Responsibilities
  • 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 use network troubleshooting tools (tcpdump, Trace route, Ping, Netstat, nslookup) to diagnose and resolve issues.
Qualifications
  • 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, Cloud Formation, and Terraform is advantageous.
  • Experience with automation tools like Ansible and version control systems such as Git Hub/Git Lab 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.
  • Active Top Secret/SCI Clearance with experience working on US Government contracts.
  • DOD 8570 IAT II and CSSP Infrastructure Support certifications.
  • Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, or Electrical Engineering.
  • 7+ years of related experience in SEIM, network operations, network engineering, leading technology teams, leading operation cybersecurity teams, or a combination thereof.
Pay Range

The proposed salary range for this position is: $75,200-$158,100

CACI 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.

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