Internal Perimeter Security Architect
Arnex Solutions LLC
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Job Details
Skills
- INTERNAL PERIMETER SECURITY SECURITY ARCHITECT
- ZERO TRUST
- NETWORK SECURITY
- SD-WAN
- CISCO ACL
Summary
Location: Chicago, IL (hybrid) (finding out about Dallas or REMOTE)
Overview:
Our client is seeking an Internal Perimeter Security Architect to perform Security Architecture to review/redesign/reengineer existing internal perimeter architecture. This is to shift security architecture from a periodic gate to a continuous engineering function that keeps pace with AI-accelerated threats.
The work maps to three core outcomes: maintaining architectural correctness throughout the change lifecycle, establishing segmentation and enclave boundaries that contain blast radius, and reducing the window between flaw discovery and remediation through detection engineering and TTP mapping.
Responsibilities:
Domain Architecture Review & Redesign
- Assess, redesign, and reengineer existing internal network architecture across distinct security domains. Deliver a structured feasibility assessment with a milestone-based remediation plan that enables informed reclassification decisions and measurably reduces network-related security risk exposure.
- Design and implement segmentation strategies; micro-segmentation, zero trust principles, and enclave hardening to limit lateral movement and contain the blast radius of potential incidents.
- Conduct a connection-by-connection assessment of high-risk internal network paths, document replacement and remediation options, and break findings into milestone-based phases with feasibility timing — all documented in Confluence.
- Evaluate and harden CI/CD pipelines and IaC configurations to ensure security controls are built into delivery workflows, not bolted on after.
- Own architectural correctness throughout the change lifecycle
- Map findings to Mythos-specific TTPs to provide early warning across every domain
- Embed AI-augmented tooling into review workflows to accelerate flaw detection
- Identify and prioritize operational risks surfaced during the engagement
Qualifications:
Required Qualifications:
Core Expertise
- Deep experience with internal network architecture and segmentation design
- Zero trust methodology - applied, not theoretical
- Strong understanding of domain-based security boundaries and lateral movement controls
- Ability to assess high-risk network connections and produce actionable, prioritized remediation options
- CI/CD pipeline and IaC security practices
- Familiarity with structured documentation and milestone-based planning (Confluence or equivalent)
- Hands-on experience with AI coding agents (e.g., Claude Code, OpenAI Codex, Gemini CLI)
- Dice Id: 91124621
- Position Id: 367-38988-1789652712
- Posted 1 day ago
Company Info
About Arnex Solutions LLC
At Arnex Solutions LLC, we go beyond traditional consulting. We blend expertise with innovation to offer end-to-end solutions that bridge the gap between business challenges and technological advancements.
Our Services:
Strategic IT Advisory: Our experienced consultants collaborate with you to craft customized IT strategies that drive growth and efficiency. We transform technology into a competitive advantage.
Talent Resourcing: Access top IT talent with ease. Our staffing solutions connect you with skilled professionals who align with your unique business requirements.
Cloud Excellence: Leverage the power of the cloud with our tailored services. From strategy to execution, we help you harness cloud capabilities for innovation and scalability.
Why Choose Arnex Solutions LLC:
Holistic Approach: We're your all-in-one partner for both strategic consulting and talent acquisition. Our holistic solutions ensure your business stays ahead in a dynamic landscape.
Client-Centric Philosophy: Your success is at the heart of everything we do. Our collaborative approach ensures we understand your unique needs and deliver impactful solutions.
Innovation Infused: We embrace emerging technologies to drive innovation. Partnering with Arnex Solutions LLC means accessing solutions that position you for sustained success.
Enduring Partnerships: Our commitment extends beyond a single project. When you choose Arnex Solutions LLC, you choose a partner dedicated to your long-term growth.
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