IDS/IPS Cyber Security Engineer (Forescout) - TS/SCI CI Poly

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.

This role requires someone working onsite in DC/Reston/Quantic/College Park. A TS/SCI CI Poly is required.

We are seeking an experienced Network Intrusion Detection Engineer to join our cybersecurity team. The ideal candidate must possess strong Linux engineering expertise with experience managing YAML configuration files, and how these configurations integrate and influence the Intrusion Detection Systems/Intrusion Prevention Systems (IDS/IPS). Highly qualified candidates will have hands-on engineering and O&M experience with Suricata and/or other network-based IDS capabilities such as Snort, VectraAI, Corelight, etc. You will play a critical role in deploying, tuning, and maintaining the IDS within a complex enterprise IT environment, primarily running on Red Hat Enterprise Linux.

What You’ll Work On:

• Designing, deploying, and maintaining IDS/IPS systems across a large enterprise with multiple networks.


• Developing, reviewing, and optimizing YAML configuration files to ensure optimal detection capabilities and minimal false positives.


• Understanding and managing the interaction between YAML configuration and its runtime engine, including rule loading, protocol decoding, and logging.


• Tuning IDS/IPS for optimal performance with NICs, including configuring Direct Memory Access (DMA), RSS queues, interrupt coalescing, and leveraging any NIC-specific acceleration features.


• Collaborating with security teams to integrate IDS/IPS with SIEM and other security monitoring platforms.


• Troubleshooting installation and operational issues specific to IDS/IPS on Red Hat Enterprise Linux, addressing compatibility, kernel module requirements, SE-Linux policies, and performance tuning.


• Identifying and mitigating common pitfalls encountered when deploying IDS/IPS in large-scale enterprise environments, including package dependencies, system resource constraints, and NIC driver/configuration issues.


• Provide detailed documentation and runbooks for Suricata configuration, tuning NICs, and deployment processes.


• Staying current with Platform IDS/IPS Software releases, NIC driver updates, and community best practices for network interface tuning and IDS/IPS performance enhancement.

Basic Qualifications:

• Proven experience working with Snort, Suricata, Corelight or other network IDS/IPS systems, including hands-on management of its YAML configuration files.


• Strong knowledge of configuration structure, syntax, and how it controls detection rules, logging, and output modules.


• Extensive experience administering Red Hat Enterprise Linux (RHEL) systems, including package management (yum/dnf), kernel module management, SE-Linux configuration, and system optimization via Unix CLI and other remote shell access vectors (puTTY, SSH, etc.)


• Hands-on experience tuning Suricata for high-performance packet capture with Napatech NICs or similar advanced network interface cards.


• Familiarity with NIC-specific features such as DMA, Receive Side Scaling (RSS), interrupt moderation, and offload capabilities, and how to configure them for Suricata.


• Experience troubleshooting Suricata’s interaction with NIC drivers and kernel modules in an enterprise environment.


• TS/SCI clearance with the ability to obtain a counter-intelligence polygraph.


• Associate’s degree and 5+ years of experience supporting IT projects and activities or Bachelor’s degree and 3+ years of experience supporting IT projects and activities or Master’s degree and 1+ years of experience supporting IT projects and activities. Years of experience may be accepted in lieu of degree.


• DoD 8570 IAT Level II Certification, including Security+ CE, CCNA-Security, GSEC, SSCP, CySA+, GICSP, or CND Certification.


• Ability to obtain a DoD 8570 Cyber Security Service Provider - Infrastructure Support Certification, including CEH, CySA+, GICSP, SSCP, CHFI, CFR, Cloud+, or CND Certification, within 60 days of start date.

Additional Qualifications:

• Experience with scripting languages (Bash, Python, YAML/Ansible, etc.) to automate Suricata configuration and deployment tasks.


• Proficient understanding of network protocols, intrusion detection methodologies, and security event correlation.


• Experience integrating Suricata with Splunk, or other SIEM solutions.


• Knowledge of containerized deployments of Suricata (Docker/Kubernetes) in enterprise environments.


• Detection and Response (NDR) solutions, including Trellix/FireEye, Corelight, Endace, Vectra AI, Dark Trace, Cisco Security Network Analytics, Open XDR, Fortinet FortiNDR, Trend Vision, etc.


• Ability to be a self-starter, work without considerable direction, and work with a team.


• Possession of excellent verbal and written communication skills, including client briefings and coordinating efforts

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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