Location
Hampton, London (Hybrid - Thames Water operational and office locations)

Hours
36 hours per week, Monday to Friday

Salary
Up to £66,000 per annum, depending on experience

About the Role
We are seeking an experienced, self-motivated Applications Engineer to join our Operational Technology (OT) team as a SCADA Subject Matter Expert (SME). You will be responsible for developing, maintaining, and optimising regional and site-based SCADA systems that support Thames Water’s water and wastewater operations. This role plays a key part in the digital transformation of the UK’s largest water company, delivering secure and resilient SCADA platforms operating 24/7.

Key responsibilities include SCADA development and lifecycle management such as designing, building, testing, deploying, and optimising OT SCADA applications. You will lead system and framework upgrades, manage SCADA Object Template Libraries, and validate system updates including Windows patches and security enhancements.

You will deliver regional and site SCADA developments, standardised architectures, and interfaces, providing technical input to capital delivery projects. Ensuring SCADA solutions meet a 99.98% availability target, you will provide second-tier OT technical support, complex fault investigation, hotfixes, and incident resolution, working closely with system integrators and vendors.

Additionally, you will engage with stakeholders to translate operational requirements into effective SCADA solutions, contribute to OT strategy and standards, review emerging technologies, and develop SCADA-related training content.

Benefits
Car Allowance: £4,500 per annum
Annual Leave: 26 days holiday per year, increasing to 30 with length of service (plus bank holidays)
Performance-related pay linked to company targets
Generous Pension Scheme through AON
Access to health and wellbeing benefits including annual health MOTs, physiotherapy, counselling, Cycle to Work schemes, shopping vouchers, and life assurance

Experience
- Strong experience in SCADA programming, development, and maintenance
- Proven ability to manage competing priorities in reactive operational environments
- Experience with SCADA platforms such as AVEVA/Wonderware System Platform, InTouch, FactoryTalk View, and ClearSCADA
- Software development experience using Microsoft .NET, C#, and structured development practices
- Experience programming to IEC 61131 standards (LD, SFC, FBD, ST, IL)
- Knowledge of Windows operating systems, virtualisation, and IP-based communications
- Experience with telemetry protocols including DNP3, WITS DNP3, Modbus, and MQTT
- Strong technical documentation and reporting skills
- Experience in the water industry, utilities, or similar regulated sectors

About you
- Self-motivated and able to work independently as well as part of a team
- Able to communicate complex technical concepts clearly to non-technical stakeholders
- Adaptable and proactive in supporting continuous improvement and digital transformation
- Committed to delivering high availability and operational excellence

Qualifications
- HNC (or equivalent) in a relevant technical discipline
- Strong understanding of OT systems and architectures
- Experience supporting relational and historian databases (e.g. SQL, PI, Wonderware Historian, ClearSCADA)
- Proficient in Microsoft Office and Visio
- Full UK driving licence

Desirable
- Experience working within water operations or OT delivery teams
- Knowledge of OT methodologies and best practices