OT/ICS Network Security Architect

The client operates industrial/environmental facilities with both traditional IT and OT/industrial environments. As part of the acquisition/integration, the Security team needs support analyzing OT site scan/discovery data and translating it into network/security architecture diagrams covering devices, zones, segmentation and data flows. For profile screening, we can primarily look for OT/ICS Network Security experience, particularly industrial network architecture, Purdue/ISA-95, OT segmentation, SCADA/industrial environments, IEC 62443/NIST 800-82, and network diagramming/documentation. Key Responsibilities Turn raw OT site scan data (asset inventories, traffic captures, device metadata) into detailed, client-ready network diagrams, devices, zones, segmentation, and data flows, structured against a recognized OT reference model such as Purdue/ISA-95. Maintain a consistent diagramming standard across sites, flag data gaps or anomalies for follow-up, and iterate based on feedback from the engagement lead and client. Required Qualifications Demonstrated experience with OT/ICS or industrial control system network environments, and solid grounding in how they differ from standard IT networks. Ability to read scan/discovery data and translate it accurately into polished, presentation-ready diagrams, with strong supporting documentation for both technical and executive audiences. Nice to Have Prior experience producing OT network diagrams as a deliverable on a security assessment or M&A/integration engagement, familiarity with common industrial protocols and OT frameworks (e.g., IEC 62443, NIST SP 800-82). This is a remote position. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law.