Senior Enterprise Network Architect - LAN/WAN & Security

Quantum Technologies. LLC; Florida; On-site; USD 90,000 - 150,000; Full time

Job summary

Quantum Technologies. LLC seeks an experienced network architect to design and implement enterprise LAN/WAN, routing, switching, and security across IT and OT environments.

The role covers high availability, SD-WAN, IP addressing, and network segmentation for critical site operations. You will lead site assessments, document current topologies, develop target architectures, and plan migrations with minimal operational impact.

Responsibilities

• Site Network Assessment—Conduct detailed assessment of the existing power plant network infrastructure.
• Review routers, switches, firewalls, WAN connectivity, wireless infrastructure, network circuits, racks, patch panels, and physical cabling.
• Document the current-state network topology and identify technical gaps, risks, dependencies, and obsolete infrastructure.
• Target Network Architecture Design the target-state network architecture required to integrate the power plant into the enterprise environment.
• Develop HLD/LLD, network topology diagrams, connectivity requirements, IP addressing strategy, segmentation, redundancy, and resiliency requirements.
• LAN/WAN Architecture Design and validate enterprise LAN/WAN connectivity, including routing, switching, VLANs, WAN circuits, SD-WAN, and site connectivity.
• Define redundant connectivity and high-availability requirements for critical plant services.
• Network Security & Segmentation—Work with cybersecurity and OT security teams to develop secure network segmentation between enterprise IT and plant/OT environments.
• Support firewall architecture, security zones, access requirements, and network-security controls.
• Ensure the migration adheres to applicable client security and infrastructure standards.
• OT/IT Integration—Coordinate integration requirements between corporate IT infrastructure and power plant operational technology.
• Identify connectivity dependencies involving plant systems and other operational applications without introducing unnecessary dependencies between OT and enterprise networks.
• Site Migration Planning—Develop the detailed network migration and cutover approach.
• Identify prerequisites, sequencing, dependencies, maintenance-window requirements, validation criteria, rollback requirements, and post-migration activities.
• Design the migration to minimize interruption to site operations
• Physical Infrastructure & Cabling—Assess structured cabling and physical network infrastructure.
• Identify requirements for fiber/copper cabling, patch panels, racks, network closets, equipment installation, labeling, and connectivity.
• Coordinate with field-services and cabling teams during implementation.
• Network Equipment & Configuration Design—Define requirements

Job description

Quantum Technologies. LLC seeks an experienced network architect to design and implement enterprise LAN/WAN, routing, switching, and security across IT and OT environments.

The role covers high availability, SD-WAN, IP addressing, and network segmentation for critical site operations. You will lead site assessments, document current topologies, develop target architectures, and plan migrations with minimal operational impact.