Site SCADA Systems Engineer (Water)

We are looking for a self-motivated, passionate, and proactive Water Site SCADA Systems Engineer to join our Operational Technology (OT) team. In this role, you will be responsible for the daily maintenance and fault-finding of Site SCADA systems (including AVEVA System Platform / Wonderware, Iconics, and RSView) for critical water treatment works, reservoirs, and booster stations across your region.

This is an exciting opportunity to play a key role in the digital transformation of the UK’s largest water company, supporting reliable, resilient, and secure SCADA operations that keep water services running 24/7.

What you’ll do as a Site SCADA Systems Engineer (Water)

SCADA System Support

• Maintain high availability of site-based SCADA platforms (targeting 99.2% uptime or higher).
• Deliver essential planned maintenance, including health checks, patches, and hotfixes.
• Implement and test disaster recovery plans and complete annual “data of last resort” backups.
• Deliver Site SCADA system updates and upgrades, ensuring programmable OT/ICA assets are maintained and current.
• Respond to SCADA-related service requests (TAPS) within 15 working days.
• Implement and maintain security improvements to enhance site OT system resilience.

Emergency & Out-of-Hours Coverage

• Participate in the in-hours and out-of-hours support roster for SCADA fault response.
• Provide emergency technical support and fault rectification to operations teams.
• Proactively use the OT fault database to optimise service delivery and reduce repeat incidents.
• Escalate recurring faults for investigation, root cause analysis, and mitigation planning.

Project & Change Support

• Champion the OT Change Management and Risk Assessment process to ensure minimal operational impact.
• Provide technical input during the design and delivery stages of Capital Delivery projects.
• Ensure all OT system changes are controlled, documented, and authorised.
• Supply SCADA asset, alarm, and event data reports to support operations and compliance.
• Identify and manage key local OT stakeholders to maintain alignment and effective delivery.

Technical Collaboration & Mentoring

• Act as a subject matter expert for Site SCADA systems and operational technology architecture in your area.
• Provide mentoring, technical support, and guidance to ICA Technicians and local operational teams.
• Foster collaboration within the wider OT Service & Technical team to deliver consistent, high-quality support.

Base location – Hybrid – Thames Valley-based offices and operational water sites

Working pattern – 36 hours Monday to Friday, with participation in an on-call rota

What you should bring to the role

Essential Experience

• Experience in the maintenance and/or delivery of SCADA or ICA systems.
• Excellent interpersonal skills with the ability to build strong working relationships with operations teams.
• Strong customer service orientation with effective communication across technical and non-technical audiences.
• Proven problem-solving skills, balancing technical, operational, and customer-focused decision-making.

Essential Technical Skills & Qualifications

• Recognised technical qualification in OT, ICA, or SCADA systems.
• Hands-on expertise in site-based SCADA and PLC systems, with up-to-date knowledge of industry best practices.
• Proficiency in AVEVA System Platform / Wonderware and legacy SCADA systems such as Iconics and RSView.
• Strong IT proficiency, including Microsoft Office and Excel for data analysis and reporting.
• Knowledge of extended SCADA programming, MS applications, and IP-based communications (LAN/WLAN).

Desirable Experience

• Experience managing competing priorities and delivering both reactive and project-based work.
• Knowledge or prior experience in the water industry, utilities, or a similar regulated sector.
• Experience negotiating with Operations to secure funding for OT hardware (e.g. servers, switches, UPS systems).

Desirable Technical Skills & Qualifications

• Technical problem-solving and fault resolution expertise.
• Understanding of basic LAN network design and troubleshooting principles.
• Awareness of network redundancy and resilience concepts such as VLANs, subnets, and redundancy protocols.

What’s in it for you?

• Competitive salary: Up to £55,000 per annum, depending on experience.
• Car Allowance: £4,500.
• Annual Leave: 26 days holiday per year, increasing to 30 with the length of service (plus bank holidays).
• Performance-related pay plan directly linked to company performance measures and targets
• Generous Pension Scheme through AON.
• Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance.

Find out more about our benefits and perks

Who are we?

We’re the UK’s largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. It’s a big job and we’ve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values

Working at Thames Water

Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, you’ll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.
If you’re looking for a sustainable and successful career where you can make a daily difference to millions of people’s lives while helping to protect the world of water for future generations, we’ll be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

We’re committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process. If you need any adjustments, whether that’s extra time, accessible formats, or anything else just let us know, we’re here to help and support.

When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business and meet colleagues.

Disclaimer: Due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.