Senior Security Architect

As the Senior Security Architect , you will be a key part of the Information Security team , focused on developing, implementing, and governing robust security architecture strategies and patterns across Thames Water. This role will support our mission to protect systems, data, and operations from cyber threats by enabling secure-by-design practices across all digital initiatives.

Reporting to the Head of Security Architecture , you will work collaboratively with key stakeholders across Thames Water to ensure new and existing technology capabilities are designed and delivered with the necessary, appropriate and proportionate security measures. This role requires deep technical expertise, strategic thinking, and strong leadership in embedding cybersecurity into the digital transformation journey.

What you’ll be doing as the Senior Security Architect :

• Security Architecture Strategy : Assist in the development and maintenance of the company-wide security architecture strategy and roadmap.
• Secure Solution Design : Lead and review security designs to ensure end-to-end solutions meet security requirements across projects and programmes.
• Security Architecture Artefacts : Create and manage security patterns, reference architectures, and technical standards for secure design and implementation.
• Threat & Risk Assessment : Conduct threat modelling and risk assessments to identify security gaps and recommend proportionate controls.
• Security Control Assurance : Validate implementation of agreed security designs through testing, reviews, and go-live assessments.
• Collaboration Across Teams : Work closely with enterprise and domain architects, cyber security, project managers, and business stakeholders to embed security into design and delivery.
• Security Governance & Compliance : Ensure adherence to internal and regulatory security standards by providing oversight throughout project and solution lifecycles.
• Vendor & Product Evaluation : Provide security input into technology procurement and vendor selection to ensure alignment with security architecture requirements.
• Security Awareness & Best Practice : Champion secure-by-design principles and contribute to developing Thames Water’s security architecture capabilities and culture.

Base location - Hybrid - Clearwater Court, Reading

Full Time - 36 hours per week

What you should bring to the role :

Essential Experience :

Essential Skills & Qualifications :

Desirable Experience :

Desirable Technical Skills & Qualifications :

What’s in it for you?

Find out more about our benefits and perks

Who are we?

We’re the UK’s largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. It’s a big job and we’ve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values

Working at Thames Wate r

Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, you’ll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.

If you’re looking for a sustainable and successful career where you can make a daily difference to millions of people’s lives while helping to protect the world of water for future generations, we’ll be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

We’re committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process . If you need any adjustments, whether that’s extra time, accessible formats, or anything else just let us know , we’re here to help and support .

When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business and meet colleagues.

Disclaimer : due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.