IDS/IPS Cyber Security Engineer, Mid

DAn Solutions, Inc; Washington (District of Columbia); On-site; USD 140,000 - 190,000; Full time

Job summary

DAn Solutions, Inc. is seeking an experienced Network Intrusion Detection Engineer to design, deploy, and maintain IDS/IPS across a large enterprise.

The role focuses on Linux engineering, YAML configuration management, and integration with SIEM systems on Red Hat Enterprise Linux. Ideal candidates will have hands-on Suricata/Snort/Corelight experience, NIC tuning, and DoD 8570/IAT II certifications, with the ability to obtain polygraph clearance.

Qualifications

• Must hold TS/SCI clearance with ability to obtain counter-intelligence polygraph.
• Experience with Snort, Suricata or Corelight and managing YAML configurations.
• Extensive Red Hat Enterprise Linux (RHEL) administration and SE-Linux knowledge.
• Experience tuning Suricata with NICs and high-performance packet capture.
• Proficiency with scripting in Bash, Python, and Ansible for automation.
• DoD 8570 IAT Level II Certification or equivalent certifications.
• Ability to obtain DoD 8570 CSP/I3P certifications within 60 days of start.

Responsibilities

• Design, deploy, and maintain IDS/IPS across a large enterprise network.
• Develop, review, and optimize YAML configuration files for detection capabilities.
• Manage interaction between YAML and runtime engine: rule loading, logging, and decoding.
• Tune IDS/IPS performance with NICs, DMA, RSS, and interrupt coalescing.
• Collaborate with security teams to integrate with SIEM and monitoring platforms.
• Troubleshoot IDS/IPS on RHEL, including kernel modules and SE-Linux.
• Identify deployment pitfalls in large environments and mitigate them.
• Provide runbooks and documentation for Suricata configuration and deployment.
• Stay current with IDS/IPS software releases and NIC driver updates.

Skills

Network IDS/IPS systems

Linux engineering

YAML configuration understanding

Scripting: Bash, Python

DoD 8570 IAT Level II Certification

Education

Associate's degree with 5+ years IT experience

Bachelor's degree with 3+ years IT experience

Master's degree with 1+ year IT experience

Tools

Suricata

Snort

Corelight

YAML

Ansible

Docker

Kubernetes

Splunk

RHEL kernel modules

Job description

REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE

Job Description:

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