Site SCADA Systems Engineer (Water)

Thames Water Utilities Limited; United Kingdom; Hybrid; GBP 56,000 - 66,000; Full time

Job summary

A leading water utility company seeks a Site SCADA Systems Engineer to ensure the uptime of essential SCADA systems. This role requires strong problem-solving skills, experience in SCADA or ICA systems, and excellent communication to work across operational teams. You'll manage system updates, participate in on-call support, and provide technical expertise to drive improvements. The position offers a competitive salary up to £66,000 per annum with excellent benefits including pension and wellness programs.

Benefits

Annual leave: 26 days increasing to 30

Performance-related pay plan

Generous pension scheme

Health and wellbeing benefits

Qualifications

• Experience in maintenance and delivery of SCADA or ICA systems.
• Strong IT proficiency for data analysis and reporting.
• Knowledge of water industry or regulated sector.

Responsibilities

• Maintain high availability of site-based SCADA platforms.
• Provide technical input during project design and delivery.
• Deliver site SCADA system updates and upgrades.

Skills

SCADA or ICA systems maintenance

Interpersonal skills

Customer service orientation

Problem-solving skills

Education

Technical qualification in OT, ICA or SCADA systems

Tools

AVEVA System Platform / Wonderware

Microsoft Office

Job description

Hybrid locations: Coppermills (WTW) – E17 7HE, Farmoor (WTW), Fobney (WTW) – RG2 0SF, Hampton (WTW) – TW12 2ES

Job title: Site SCADA Systems Engineer (Water)

Ref 43284 | Division Digital | Contract type: Permanent | Salary: Competitive up to £66,000 per annum | Closing date: 27/01/2026

Job Overview

Self‑motivated, passionate and proactive Water Site SCADA Systems Engineer needed to join our Operational Technology (OT) team, responsible for daily maintenance and fault‑finding of site SCADA systems across critical water treatment works, reservoirs and booster stations.

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 current.
• Respond to SCADA‑related service requests (TAPS) within 15 working days.
• Implement and maintain security improvements to enhance site OT system resilience.
• 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.
• 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

• 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).
• 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 £66,000 per annum, depending on experience.
• Annual leave: 26 days holiday per year, increasing to 30 with length of service (plus bank holidays).
• Performance‑related pay plan linked to company performance measures and targets.
• Generous pension scheme through AON.
• Access to health and wellbeing benefits – annual health MOTs, physiotherapy, counselling, Cycle‑to‑Work schemes, shopping vouchers and life assurance.

We’re committed to being a great, diverse, and inclusive place to work. All qualified candidates are encouraged to apply.