Senior Cyber Security Engineer

As a Senior Cyber Security Engineer, you will play a key role in supporting the design, implementation, and maintenance of Cyber Security Engineering solutions, controls, and processes across Thames Water’s IT and OT environments. You will be responsible for supporting cyber security platform administration, enhancing our security posture, and ensuring that new capabilities are securely deployed in alignment with business objectives. This includes collaborating with stakeholders, supporting compliance efforts, and helping to drive proactive cyber risk reduction.

This role requires a deep understanding of security engineering concepts, infrastructure technologies, and best practices. The ideal candidate will have strong communication skills, a solid grasp of IT and OT systems, and a passion for continuous improvement in cybersecurity operations.

What you’ll be doing as a Senior Cyber Security Engineer

Support the creation of secure asset builds and system hardening capabilities across end-user computing and server environments.
Collaborate with business stakeholders to align cybersecurity engineering strategies and controls with organisational goals.
Develop and maintain cybersecurity engineering documentation, policies, and procedures.
Implement and manage security controls across both IT and OT environments.
Monitor compliance of endpoint and network security solutions, ensuring correct configurations and up-to-date signatures.
Perform cloud security assessments and produce supporting documentation for secure cloud adoption.
Evaluate and recommend security technologies, tools, and vendors.
Investigate vulnerabilities and implement mitigation actions.
Liaise with technology and business teams regarding patching and vulnerability remediation.
Develop and maintain cybersecurity engineering dashboards and metrics.
Provide tooling support and maintenance for Identity & Access Management, Privileged Access Management, Endpoint Security, and Network Security.
Support compliance with standards and regulations, including GDPR, NIS, and ISO 27001.
Monitor and optimise security engineering tool performance, implementing proactive solutions.
Stay current on cybersecurity trends, emerging threats, and new technologies.
Base location – Hybrid – Clearwater Court, Reading.

Working pattern – 36 hours, Monday to Friday.

What you should bring to the role

Experience in Security Engineering, with a focus on process and control design in an enterprise environment.
Strong understanding of both IT and OT systems and infrastructure.
Experience in identifying and remediating cyber risks in evolving digital environments.
Good knowledge of identity and access management technologies (e.g. Entra ID, CyberArk).
Familiarity with a range of operating systems and security considerations across SaaS, IaaS, end-user computing, and server estate.
Sound knowledge of network security technologies, including firewalls, IDS/IPS, and NAC.
Strong analytical, planning, and organisational skills.
Ability to communicate technical issues clearly to non-technical stakeholders.
Degree in Cyber Security, Computer Science, Information Technology, Engineering, or a related field.
Industry certification(s) such as CCSP, CompTIA Security+, or SC-200.
It would be great if you also had

Previous experience working in a large, complex infrastructure-based or water utility organisation.
Experience in systems or network administration in IT and/or OT environments.
Experience leading or mentoring others in delivering cybersecurity outcomes.
Security engineering vendor or product certifications such as CVA, Microsoft Certified: Azure Security Engineer Associate, Tenable, or CyberArk.
What’s in it for you?

Competitive salary up to £72,600 per annum depending on experience.
Annual Leave - 26 days holiday per year increasing to 30 with the length of service. (plus bank holidays)
Generous Pension Scheme through AON.
Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance.
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 Water

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 fast-tracked career opportunities, flexible working arrangements and excellent benefits.
Whether you’re interested in a role in one of our call centres or science labs, we’re looking for people like you with real passion and a burning desire to make things better.

So, 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.

Our overarching aim is to ensure that Thames Water is a great, diverse, and inclusive place to work. We welcome applications from everyone and offer extra support for those who need it throughout the recruitment process. Our aim is to remove any real or perceived barriers to success, so if you need assistance, 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