OT Solutions Architect: Secure SCADA & Industrial Systems

Southern Water; Worthing; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Southern Water invites an experienced OT Solutions Architect to lead secure, scalable OT designs across our processing and distribution networks. You will shape OT architectures that integrate with IT, ensure governance, and support safe operations across water and wastewater assets.

You will collaborate with engineering, IT, cybersecurity and external partners, align with IEC 62443, NIST and ISO 27001, and drive deployment across SCADA, PLC, DCS, HMI and historian environments.

Qualifications

• Experience in OT and ICS architecture across critical environments.
• Design OT solutions involving SCADA, PLC, DCS, RTU, HMI and historian.
• Knowledge of industrial protocols: OPC-UA, Modbus/TCP, DNP3, PROFINET, Ethernet/IP, BACnet.
• Experience designing secure OT networks with segmentation and Purdue Model.
• Strong OT cybersecurity knowledge: IEC 62443, NIST, ISO 27001.

Responsibilities

• Design OT architectures across SCADA, PLC, DCS, HMI, historian and industrial network environments.
• Develop integrated OT/IT solutions and defining data flows and system interfaces.
• Provide technical assurance and governance for OT designs and implementations.
• Support OT cybersecurity initiatives and ensuring alignment with standards such as IEC 62443, NIST and ISO 27001.
• Lead technical engagement with system integrators, vendors and operational stakeholders.
• Supporting deployment, testing, commissioning and migration activities across OT environments.

Skills

OT architecture

SCADA

PLC

DCS

RTU

HMI

OPC-UA

DNP3

Industrial networks

Cybersecurity

Job description

Southern Water invites an experienced OT Solutions Architect to lead secure, scalable OT designs across our processing and distribution networks. You will shape OT architectures that integrate with IT, ensure governance, and support safe operations across water and wastewater assets.

You will collaborate with engineering, IT, cybersecurity and external partners, align with IEC 62443, NIST and ISO 27001, and drive deployment across SCADA, PLC, DCS, HMI and historian environments.