Lead IT/OT Network Architect - Zero Trust Integration

Keystone Solutions; Brussel Hoofdstad; Hybride; EUR 90 000 - 130 000; Plein temps

Résumé du poste

Keystone Solutions is seeking a hands-on Lead Network Architect to drive the convergence of two major corporate networks and build a resilient IT/OT infrastructure. You will design, implement, and document a Zero Trust segmentation model across multi-country environments, coordinating with CISO and Security Architects to ensure secure group-level integration.

You will own practical architectures, addressing IPv4 conflicts, interconnection topologies, and deployment roadmaps, while aligning with

Qualifications

• Hands-on Zero Trust Architecture design experience applied to network segmentation.
• Extensive IPv4 addressing, subnetting, routing and IP-space conflict resolution across merging networks.
• Proven experience in network segmentation for converged IT/OT environments.
• Ability to define IEC 62443 zones and conduits from first principles.
• Experience with VLANs, VRFs, firewall policy design in enterprise settings.
• Strong documentation discipline to produce reusable designs and handovers.

Responsabilités

• Resolve IP address overlap between client and acquired company and design resolution paths.
• Co-author a Zero-Trust IT/OT segmentation model with IEC 62443 guidance.
• Ensure SD-WAN alignment does not conflict with segmentation design; escalate if needed.
• Deliver a validated pilot design for a representative group of sites.
• Document designs and reasoning for handover to client permanent teams.

Connaissances

Zero Trust Architecture

IPv4 expertise

Network segmentation design

IEC 62443 zones

VLANs & VRFs

Documentation discipline

OT/IT convergence

Group-wide integration

Outils

NetBox

IPAM tools

Palo Alto Prisma Access

Zscaler

Illumio

Description du poste

Keystone Solutions is seeking a hands-on Lead Network Architect to drive the convergence of two major corporate networks and build a resilient IT/OT infrastructure. You will design, implement, and document a Zero Trust segmentation model across multi-country environments, coordinating with CISO and Security Architects to ensure secure group-level integration.

You will own practical architectures, addressing IPv4 conflicts, interconnection topologies, and deployment roadmaps, while aligning with