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INTERNAL PERIMETER SECURITY ARCHITECT
ZERO TRUST
CI/CD
NETWORK SECURITY

Summary

Job Title: Internal Perimeter Security Architect (Contract )

Location: Chicago, IL (hybrid) (finding out about Dallas or REMOTE)

6-9+ months.

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.

Internal Segmentation & Zero Trust

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.

Current-State Network Analysis

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.

CI/CD & Infrastructure-as-Code Security

Evaluate and harden CI/CD pipelines and IaC configurations to ensure security controls are built into delivery workflows, not bolted on after.

Continuous Architecture Ownership

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

Additional Experience

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)

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 91124621
Position Id: 367-38988-1785173709
Posted 9 hours 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.

Network Security Assessment Engineer

Chicago, Illinois

•

Today

Network Security Assessment Engineer Location:Chicago, IL (hybrid) or Dallas, TX Overview: Our client is seeking aNetwork Security Assessment Engineer toprovide expert-level network security engineering services to review, assess, hunt for known flaws and threat indicators, and document findings identified through red team testing and accelerated resolution of Security Operational Readiness Tests (SORTS) across the enterprise network infrastructure. Work encompasses the full technology stack m

Full-time, Third Party

Depends on Experience

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Internal Perimeter Security Architect

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Internal Perimeter Security Architect

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