Site SCADA Engineer; Waste

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, Factory Talk 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.

• 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.

• 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.

• 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.

• 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.

• Act as a subject matter expert for site‑based OT and SCADA systems in your regional area.
• Provide mentoring and technical guidance to ICA Technicians and other stakeholders.
• Collaborate closely with local Operations and OT teams to ensure system performance and reliability.

• Maintain documentation for disaster recovery, system configuration, and support procedures.
• Support knowledge sharing across the wider OT team through guides and mentoring.
• Identify and champion opportunities for process improvement, system upgrades, and automation.

• Hands‑on experience in maintenance or delivery of SCADA/ICA systems (e.g. AVEVA System Platform / Wonderware, Factory Talk View, Iconics, and Allen‑Bradley PLCs).
• Excellent interpersonal skills and the ability to work closely with operational teams.
• A strong passion for customer service, especially among internal technical stakeholders.
• Clear and effective communication skills, including the ability to explain technical issues to non‑technical audiences.
• Proven problem‑solving skills with the ability to balance technical, operational, and customer‑focused decision‑making.

• Recognised technical qualification in Operational Technology, ICA, or SCADA systems.
• In‑depth experience supporting and configuring AVEVA, Factory Talk, or Iconics SCADA platforms.
• Expertise in PLC‑based systems, especially Allen‑Bradley controllers.
• Knowledge of LAN and IP‑based communications within OT environments.
• Proficiency in Microsoft Office and common IT tools for reporting and analysis.