Location
Hampton, London (Hybrid working across 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, resilient SCADA platforms that operate 24/7.

Key responsibilities include:

- Developing and maintaining OT SCADA applications throughout their full lifecycle, including design, build, testing, deployment, and optimisation.
- Leading SCADA system, application, and framework upgrades to ensure platforms remain secure, supported, and maintainable.
- Managing SCADA Object Template Libraries, standards, and configurations.
- Validating and deploying system updates such as Windows patches, security, and antivirus updates.
- Delivering regional and site SCADA developments with standardised architectures and deployment solutions.
- Developing SCADA interfaces, data streams, and telemetry communications.
- Providing technical SCADA input to capital delivery projects through design and commissioning.
- Ensuring SCADA solutions meet operational requirements with a 99.98% availability target.
- Providing second-tier OT technical support including complex fault investigation, hotfixes, and incident resolution.
- Collaborating with system integrators and vendors to resolve issues and improve system performance.
- Translating operational requirements into effective SCADA solutions.
- Contributing to OT strategy, standards, and architecture development.
- Reviewing emerging SCADA and OT technologies to support continuous improvement.
- Developing and maintaining SCADA-related training content.

Join us to help build a better future for our customers, communities, and the planet by supporting critical water infrastructure with cutting-edge technology and expertise.

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.
- Committed to continuous improvement and learning.
- Flexible and adaptable to changing priorities in a dynamic operational environment.

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.