OT SCADA Engineer

Salary: £40,000 - 40,000 per year

Requirements

• Minimum 5 GCSEs (or equivalent) including Mathematics, English and a Science subject
• Relevant industrial control, automation or engineering qualification (ONC/HNC or equivalent)
• Relevant SCADA, PLC or industrial automation training
• Full UK driving licence
• Ability to successfully obtain UK Government Security Clearance (SC)
• Desirable Qualifications:
• Industrial control or automation apprenticeship, or equivalent industry experience
• Project management qualification (e.g. PRINCE2)
• Degree or equivalent qualification in a relevant discipline
• Vendor-specific or specialist training in SCADA, PLCs, telemetry, networking or cyber security
• Essential Experience:
• Experience working in operational or industrial technology environments within a medium to large organisation
• Demonstrable experience across multiple OT disciplines, including SCADA system configuration and support, PLC diagnostics and code modification, telemetry and RTU configuration, industrial communications and OT networking
• Experience providing reactive support in live operational environments, including participation in standby or on-call arrangements
• Experience contributing to OT project delivery, including documentation, testing, commissioning and handover
• Experience applying technical standards, change governance and cyber-security principles in regulated or critical operational environments
• Practical understanding of clean water and wastewater treatment processes sufficient to support monitoring, control and fault resolution

Responsibilities

• Design, configure, commission and support SCADA systems, including alarms, data handling, trending, archiving and visualisation across both new and legacy platforms
• Integrate PLCs, RTUs and field instrumentation with SCADA systems using standard industrial protocols (e.g. Modbus, OPC, Ethernet/IP)
• Configure, commission and support telemetry and point-to-point communications, including radio, cellular and satellite solutions for remote and unmanned sites
• Deliver high-quality HMI configuration and commissioning, ensuring consistency with standards and effective operator interaction
• Design, configure and support OT network infrastructure (Ethernet, serial, fieldbus), undertaking fault diagnostics using industry-recognised tools
• Support SCADA platform and server infrastructure across Windows and Linux environments, including system build, configuration, hardening and lifecycle support
• Deliver OT projects in line with scope, timescales, budgets and change governance
• Provide reactive operational support, including fault diagnosis, root cause analysis and follow-up actions, and take part in a 24 x 7 x 365 standby rota (role-dependent)
• Apply OT technical standards, cyber-security controls and health & safety requirements consistently, contributing to continuous improvement and best practice
• Design, develop and commission PLC software for new assets, and provide expert fault-finding support to frontline operational teams (role-dependent)

Technologies

• Ethernet
• Support
• Linux
• Network
• PLC
• Security
• Windows
• Office 365
• Hardware

More

At South West Water, we are dedicated to providing safe and reliable drinking water and wastewater services across the stunning South West landscapes of the UK. As part of the Pennon Group, we are committed to a greener future, with initiatives including planting 300,000 trees and restoring peatlands. We believe in creating opportunities for our team to shape their careers in a rewarding and inclusive environment. As an OT SCADA Engineer, you will enjoy a competitive salary based on experience, an annual bonus scheme, a robust pension plan, flexible working options, healthcare benefits, and employee discounts, alongside a supportive workplace culture that values diversity and belonging.

last updated 29 week of 2026