Location
London, Thames Valley-based offices and operational wastewater sites (Hybrid working)

Hours
36 hours per week, Monday to Friday, with participation in an on-call rota

Salary
Up to £66,000 per annum, depending on experience

About the Role
We are seeking 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 maintain and support Thames Water’s critical 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 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 reduce pollution, improve performance, and drive innovation in a business delivering life’s essential service every day.

Key Responsibilities:
- Maintain high availability of site-based SCADA platforms, targeting 99.2% uptime or higher
- Perform planned maintenance including health checks, patches, and hotfixes
- Deliver system updates and upgrades to keep programmable OT/ICA assets current
- Diagnose and resolve faults across SCADA systems, HMIs, and PLCs
- Complete disaster recovery planning and perform annual backups
- Implement and maintain security enhancements for Site SCADA systems
- Participate in out-of-hours support rota for SCADA fault response
- Respond to and resolve high-impact incidents and escalate recurring faults
- Manage SCADA-related service requests within agreed timescales
- Support OT access, alarm, and event data requests for operational and compliance needs
- Champion OT Change Management and Risk Assessment processes
- Support Capital Delivery teams with design input, commissioning, and risk reviews
- Act as a subject matter expert and provide mentoring and technical guidance
- Maintain documentation and support continuous improvement initiatives

Experience
- Hands-on experience in maintenance or delivery of SCADA/ICA systems such as AVEVA System Platform / Wonderware, FactoryTalk View, Iconics, and Allen-Bradley PLCs
- Proven problem-solving skills balancing technical, operational, and customer-focused decision-making
- Excellent interpersonal skills with ability to work closely with operational teams
- Experience managing conflicting priorities and delivering both reactive and project-based work (desirable)
- Knowledge or experience within the water or wider utilities sector (desirable)
- Exposure to project work across planning, design, and delivery stages of ICA systems (desirable)

About you
- Strong passion for customer service, especially internal technical stakeholders
- Clear and effective communication skills, able to explain technical issues to non-technical audiences
- Ability to collaborate closely with local Operations and OT teams to ensure system performance and reliability
- Enthusiastic about continuous improvement and knowledge sharing

Qualifications
- Recognised technical qualification in Operational Technology, ICA, or SCADA systems
- In-depth experience supporting and configuring AVEVA, FactoryTalk, 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
- Working knowledge of basic LAN network troubleshooting (desirable)
- Understanding of network design principles including VLANs, subnets, and redundancy protocols such as MRP or RSTP (desirable)