Location
Walthamstow, London with hybrid working from Thames Valley-based offices and operational water sites.

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

Salary
Up to £66,000 per annum, depending on experience, plus £4,500 car allowance.

About the Role
We are seeking a self-motivated, passionate, and proactive Water Site SCADA Systems Engineer to join our Operational Technology (OT) team. You will be responsible for the daily maintenance and fault-finding of Site SCADA systems including AVEVA System Platform / Wonderware, Iconics, and RSView across critical water treatment works, reservoirs, and booster stations in your region. This role is key to supporting the digital transformation of the UK’s largest water company, ensuring reliable, resilient, and secure SCADA operations that keep water services running 24/7.

Key responsibilities include:
- Maintaining high availability of site-based SCADA platforms targeting 99.2% uptime or higher.
- Delivering planned maintenance such as health checks, patches, hotfixes, and disaster recovery testing.
- Implementing system updates and upgrades while maintaining programmable OT/ICA assets.
- Responding to SCADA-related service requests within 15 working days.
- Enhancing site OT system resilience through security improvements.
- Participating in in-hours and out-of-hours support rosters for fault response.
- Providing emergency technical support and fault rectification.
- Using fault databases to optimize service delivery and reduce repeat incidents.
- Escalating recurring faults for root cause analysis and mitigation.
- Supporting OT Change Management and Risk Assessment to minimize operational impact.
- Providing technical input during Capital Delivery projects.
- Ensuring all OT system changes are controlled, documented, and authorised.
- Supplying SCADA asset, alarm, and event data reports for operations and compliance.
- Acting as a subject matter expert and mentoring ICA Technicians and operational teams.
- Fostering collaboration within the wider OT Service & Technical team to deliver consistent, high-quality support.

Experience
- Proven experience in maintenance and/or delivery of SCADA or ICA systems.
- Strong interpersonal skills with ability to build effective working relationships with operations teams.
- Customer service oriented with excellent communication skills for both technical and non-technical audiences.
- Demonstrated problem-solving skills balancing technical, operational, and customer needs.
- Experience managing competing priorities and delivering reactive and project-based work is desirable.
- Knowledge or experience in the water industry, utilities, or regulated sectors is advantageous.
- Experience negotiating with Operations to secure funding for OT hardware such as servers, switches, and UPS systems is a plus.

About you
Self-motivated, proactive, and passionate about operational technology and digital transformation. Able to work collaboratively and mentor others. Committed to delivering reliable and secure SCADA operations that support critical water infrastructure.

Qualifications
- Recognised technical qualification in OT, ICA, or SCADA systems.
- Hands-on expertise with site-based SCADA and PLC systems, including AVEVA System Platform / Wonderware and legacy systems like Iconics and RSView.
- Strong IT skills including Microsoft Office and Excel for data analysis and reporting.
- Knowledge of extended SCADA programming, MS applications, and IP-based communications (LAN/WLAN).
- Technical problem-solving and fault resolution expertise.
- Understanding of basic LAN network design, troubleshooting, and concepts of network redundancy such as VLANs, subnets, and redundancy protocols is desirable.