Waste Site SCADA Systems Engineer - Thames Water

We are looking for a highly motivated and technically skilled Waste Site SCADA Systems Engineer to join our Operational Technology (OT) Waste SCADA support team. In this role, you will support the critical systems that keep our wastewater operations running 24/7, delivering essential wastewater services to millions of customers.

You will be responsible for maintaining and supporting Thames Water’s Site SCADA systems (based on platforms such as AVEVA System Platform / Wonderware, FactoryTalk View, and Iconics), ensuring their security, resilience, and availability. Your work will enable remote monitoring, control, and data insight across treatment works and pumping stations, supporting front-line operations teams and capital delivery projects.

This is an exciting opportunity to contribute to the future of Operational Technology in the UK’s largest water and wastewater company, helping us reduce pollution, improve performance, and drive innovation in a business delivering life’s essential service every day.

What you’ll do as a Waste Site SCADA Systems Engineer

SCADA System Support:

• Maintain high availability of site-based SCADA platforms (targeting 99.2% uptime or higher).
• Perform essential planned maintenance, including health checks, patches, and hotfixes.
• Deliver site SCADA system updates and upgrades, ensuring programmable OT/ICA assets remain up to date.
• Diagnose and resolve faults across SCADA systems, HMIs, and PLCs to restore system functionality.
• Complete disaster recovery planning and perform annual “data of last resort” backups.
• Implement and maintain security enhancements for Site SCADA systems.
• Proactively identify and mitigate risks related to system performance, integrity, and resilience.

Emergency & Out-of-Hours Coverage:

• Participate in the out-of-hours support roster for SCADA fault response.
• Respond to and resolve high-impact incidents, using technical expertise and historical data.
• Escalate recurring faults and contribute to root cause analysis and long-term mitigation.

Incident & Request Management:

• Respond to SCADA-related service requests (TAPS) within 15 working days.
• Engage with OT Fault Databases to improve service delivery and reduce reactive workload.
• Support OT access, alarm, and event data requests for operational and compliance needs.

Project & Change Support:

• Champion the OT Change Management and Risk Assessment process.
• Support Capital Delivery teams with design input, commissioning support, and risk reviews.
• Ensure all changes to site OT systems are controlled and documented.
• Provide system data and insights to help projects meet operational needs and reduce risks.

Technical Collaboration & Subject Matter Expertise: