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Security Tools Engineer (TS/SCI) - St Louis, MO

Guidepointsecurity

St Louis, MO (Federal) Remote permanent

Posted: October 8, 2025

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Job Description

GuidePoint Security provides trusted cybersecurity expertise, solutions and services that help organizations make better decisions and minimize risk. By taking a three-tiered, holistic approach for evaluating security posture and ecosystems, GuidePoint enables some of the nation’s top organizations, such as Fortune 500 companies and U.S. government agencies, to identify threats, optimize resources and integrate best-fit solutions that mitigate risk.

An active Top Secret/SCI clearance is required prior to consideration for this role.

Work is to be performed 100% onsite.

As a Network Defense Linux Systems Engineer, you will be part of a Network Defense Team that is at the forefront of integrating advanced Linux systems into our cybersecurity framework. This role is ideal for someone who thrives in a collaborative environment where their skills directly contribute to strengthening our digital defenses. You’ll 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.

What You'll Get To Do:


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:

• 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.

• Active TS/SCI (required to obtain a CI Poly within 6 months of hire date)

• DOD 8570 IAT II certifications (CompTIA Security+ or equivalent)

• 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.

• Related technical experience in network security technologies such as Juniper SRX, Palo Alto Firewall, F5 Load Balancer, Cisco FTD/ASA, Gigamon, FireEye, RSA Netwitness or others (NOTE: these specific tools are listed as examples; expertise in all of these are not expected)

Nice to Haves:

• CI Poly (required within 6 months)

• CSSP Infrastructure Support certifications, commonly CEH or CySA+ though there are several certs that qualify (required within 6 months)

We use Greenhouse Software as our applicant tracking system and Zoom Scheduler for HR screen request scheduling. At times, your email may block our communication with you. Please be sure to check your SPAM folder so that you don't miss updates on your application.

Why GuidePoint?

GuidePoint Security is a rapidly growing, profitable, privately-held value added reseller that focuses exclusively on Information Security. Since its inception in 2011, GuidePoint has grown to over 1000 employees, established strategic partnerships with leading security vendors, and serves as a trusted advisor to more than 4,200 customers.

Firmly-defined core values drive all aspects of the business, which have been paramount to the company’s success and establishment of an enjoyable workplace atmosphere. At GuidePoint, your colleagues are knowledgeable, skilled, and experienced and will seek to collaborate and provide mentorship and guidance at every opportunity.

This is a unique and rare opportunity to grow your career along with one of the fastest growing companies in the nation.

Some added perks….

• Remote workforce primarily (U.S. based only, some travel may be required for certain positions, working on-site may be required for Federal positions)

• Group Medical Insurance options: Zero Deductible PPO Plan (GuidePoint pays 90% of the premium for employees and 70% for family plans (spouse/children/family) or High Deductible Health Plan with HSA (GuidePoint pays 100% of the employees premiums and 75% for family plans (spouse/children/family) and GPS will contribute in one lump sum: ($500 per EE annually / $1000 per family annually (includes spouse/children/family options)

• Group Dental Insurance: GuidePoint pays 100% of the premium for employees and 75% of family plans

• 12 corporate holidays and a Flexible Time Off (FTO) program

• Healthy mobile phone and home internet allowance

• Eligibility for retirement plan after 2 months at open enrollment

• Pet Benefit Option

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