Network Infrastructure Architect

Job Description 

The Network Infrastructure Architect provides enterprise‑level architecture, design, and technology‑strategy leadership to evolve the Homeland Security Enterprise Network (HSEN) and HQ LAN‑A toward a scalable, interoperable, zero‑trust framework. The role shapes a three‑year technology roadmap, conducts proof‑of‑concepts, and ensures all solutions meet DHS enterprise architecture standards, security accreditation (FISMA/NIST 800‑53), and 99.95 % availability objectives. 

The objective of the support services for this project is to design, build, and maintain a cloud infrastructure with a focus on network security that supports the organization's technology and business needs. This involves architecting scalable, secure, and highly available cloud solutions, ensuring optimal performance and cost-efficiency in cloud environments such as AWS, Azure, and Google Cloud. The role requires close collaboration with other IT teams, stakeholders, and third-party vendors to deliver cloud-based infrastructure and services that align with organizational goals.

-Develop HSEN/LAN‑A reference architectures covering WAN/MPLS/SD‑WAN, campus LAN, wireless, TACACS/ISE, firewalls, and cloud on‑ramps. 

-Produce system design documents, diagrams, IP schemas, and maintain CMDB accuracy. 

-Model traffic, capacity, and failover scenarios; conduct gap analysis. 

-Lead evaluations of emerging technologies and vendor offerings; perform COTS/OSS trade studies. 

-Deliver executive briefings and a rolling three‑year technology roadmap aligned with DHS mission and budget cycles. 

-Embed zero‑trust, micro‑segmentation, and IPv6 compliance into all designs. 

-Support ATO renewals by providing architecture artifacts and POA&M responses. 

-Develop test plans, oversee lab validation, and provide Tier‑4 escalation during deployment. 

-Generate transition documentation for NOSC operations teams and deliver knowledge‑transfer workshops. 

-Infrastructure Engineering, Development, Implementation, Integration 

-Enterprise Application Integration 

-Gap Analysis and Benchmarking 

-Data Migration and Integration 

-Acquisition Support 

-Risk Assessment 

-Open-Source Integration 

-Enterprise Data Management 

-Collaboration Tools 

-Business Process Reengineering 

-Test and Evaluation Services 

-Financial Analysis 

-Feasibility Studies 

-Requirements Analysis 

-System Design Alternative (SDA) Studies 

-Architecture Validation and Verification 

-Master’s degree in Computer Science, Electrical Engineering, or related discipline. 

-15 + years architecting enterprise WAN/LAN solutions with ≥ 5,500 sites and ≥ 250,000 users. 

-10 + years direct support to DHS‑wide networks. 

-Hands‑on experience with SD‑WAN, cloud connectivity, and automation (Ansible/Python).