Site SCADA Systems Engineer in Walthamstow

Site SCADA Systems Engineer (Water) – Walthamstow, Greater London, E17 7HE

Contract: PermanentSalary: Competitive salary up to £66,000 per annumWe 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 £66,000 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