Location
Abbey Wood, London with hybrid working between Thames Valley-based offices and operational wastewater sites.

Hours
36 hours per week, Monday to Friday, with participation in an on-call rota for out-of-hours support.

Salary
Up to £62,000 per annum, depending on experience, plus £4,500 car allowance.

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, including platforms such as AVEVA System Platform / Wonderware, FactoryTalk View, and Iconics. Your work will ensure the security, resilience, and availability of these systems, enabling remote monitoring, control, and data insight across treatment works and pumping stations. This role supports front-line operations teams and capital delivery projects, contributing to the future of Operational Technology at the UK’s largest water and wastewater company. You will help 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, ensuring programmable OT/ICA assets remain current.
- Diagnose and resolve faults across SCADA systems, HMIs, and PLCs.
- Complete disaster recovery planning and perform annual backups.
- Implement and maintain security enhancements.
- 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 15 working days.
- Support OT access, alarm, and event data requests.
- 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 ability to work closely with operational teams and provide excellent customer service.
- Experience responding to and resolving technical faults and incidents.
- Ability to manage conflicting priorities and deliver both reactive and project-based work.
- Knowledge or experience within the water or wider utilities sector is desirable.
- Exposure to project work across planning, design, and delivery stages of ICA systems is advantageous.

About You
- Strong passion for customer service, especially for internal technical stakeholders.
- Clear and effective communication skills, able to explain technical issues to non-technical audiences.
- Proven problem-solving skills balancing technical, operational, and customer-focused decision-making.
- Collaborative team player with a proactive approach to continuous improvement.
- Willingness to participate in on-call rota and out-of-hours support.

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.
- Desirable: Working knowledge of LAN network troubleshooting and network design principles including VLANs, subnets, and redundancy protocols such as MRP or RSTP.