The role

As an Enterprise Architect, you will lead the design and evolution of our technology landscape to ensure it is secure, scalable and aligned to our strategic objectives. You’ll work across business and technology teams to define architecture standards, roadmaps and governance, translating business needs into cohesive solutions that support the organisation’s transition to net zero. You will influence senior stakeholders, support project delivery through architectural review and assurance, and champion best practice for cloud, data, integration and security.

The team

It’s an exciting time to join the newly formed Marketing, Digital and Technology Centre of Excellence at Energy Saving Trust. We are on an ambitious growth journey to accelerate the use of our services through customer centric digital transformation. This includes a move to a product orientated approach, an increasingly Agile delivery model and harnessing data to enhance our digital products and services.

Our approach is open and collaborative, where we want everyone to be able to bring their unique perspectives to help tackle the climate emergency.

What you will do

• Define and maintain enterprise architecture
  Develop and maintain target architectures, principles and roadmaps that align IT capability with business strategy. Ensure architectures are pragmatic, future‑proof and support sustainable technology choices.

• Provide architectural leadership and governance
  Lead architectural reviews, provide design authority for major initiatives, and ensure compliance with standards and security requirements. Facilitate decision making and trade‑off analysis across programmes and projects.

• Drive cloud, data and integration strategies
  Shape cloud adoption patterns, integration approaches (APIs, messaging), and data architecture to enable interoperable, resilient services and effective use of data across the organisation.

• Partner with stakeholders
  Work closely with business owners, product managers and delivery teams to translate needs into viable, cost‑effective technical solutions. Communicate complex ideas clearly to technical and non‑technical audiences.

• Support secure and sustainable delivery
  Embed security, privacy and sustainability considerations into architectural decisions. Recommend technology selections that reduce carbon impact and support long‑term maintainability.

• Improve standards and ways of working
  Promote architecture patterns, reusable components and automation to increase delivery speed and quality. Contribute to continuous improvement of tooling, documentation and practices.

What you will bring

• Proven experience as an enterprise or solution architect, working on complex, multi‑system environments and delivering strategy, roadmaps and governance.

• Strong knowledge of cloud platforms (AWS, Azure or GCP), integration patterns (APIs, ESB, messaging), data architecture and modern application design (microservices, serverless).

• Good understanding of security, identity and access management, and data protection principles with experience embedding them into architectures.

• Excellent communication and stakeholder management skills with experience influencing senior leaders and working across multidisciplinary teams.

• Practical experience of architecture governance, modelling techniques and tools (e.g., TOGAF, ArchiMate, or equivalent approaches) and the ability to apply them pragmatically.

• A collaborative, solutions‑focused mindset with strong analytical skills and attention to detail.

• Comfortable with agile delivery approaches and working in cloud‑native environments. Relevant professional qualifications or certifications are desirable but not essential.

For more information, please see the job description

Please submit an anonymised CV and cover letter, removing your name, address, email address, and any other identifying details. Please note, applications submitted without a cover letter may be rejected.

Who we are

Energy Saving Trust is a leading and trusted organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use. We aim to address the climate emergency and deliver the wider benefits of clean energy as we transition to net zero.

At Energy Saving Trust we don’t just offer jobs – we offer careers. For our people, being part of the effort to address the climate emergency makes working for us truly meaningful and rewarding.

Work where you thrive

We offer flexible working arrangements; many roles can be done remotely, with offices available in London, Edinburgh, Belfast, Cardiff and Hadleigh for those who wish to spend time on site. We support hybrid working and provide the equipment and tools needed to do the job effectively.

We’ll support you with:

• Generous holiday (25 days + bank holidays + extra Christmas leave)

• True flexibility in how and where you work

• Strong pension & life assurance

• Enhanced family leave

• Green travel perks (EV scheme, cycle to work)

• Professional development support

• Yearly wellbeing allowance

These are just some of the benefits we offer. Want to know more about how we make flexibility real? Check out our Benefits and Culture page

Reasonable adjustments: We want to ensure that our recruitment process is inclusive of and accessible for everyone.

If you think you may need additional support or reasonable adjustments made to any part of the recruitment process, please get in touch with recruitment@est.org.uk or call reception on +44 (0)20 7222 0101. We will do our very best to support you.

Diversity and inclusion
Energy Saving Trust is committed to creating a diverse, inclusive and equitable workplace where everyone can be themselves, with support to be their best.

We strongly encourage applicants from a wide range of backgrounds and with different identities and experiences to apply for roles with Energy Saving Trust.

We are a Disability Confident Committed employer and we ringfence a minimum number of interview slots for candidates who apply via the Disability Confident scheme and meet the criteria for a role. Find out more here.

You can find out more about our commitment to diversity and inclusion here.

To avoid disappointment, you are advised to submit your application as soon as possible as we reserve the right to close the vacancy early if a high volume of applications are received. This is to ensure that we can manage application levels whilst maintaining a positive candidate experience. Unfortunately, once a vacancy has closed, we are unable to consider further applications.

Please note, that we are unable to provide visa sponsorship for this post. To apply for this post, you must be able to demonstrate your eligibility to work in the UK.