Enterprise Architect

Amentum; Cardiff; On-site; GBP 70,000 - 110,000; Full time

Job summary

Amentum is seeking an Enterprise Architect to shape client IT architectures and align them with business goals. You will ensure IT systems support long-term objectives in Defence, CNI, and other critical sectors.

Join a team delivering complex projects across infrastructure, security, and digitalisation. You will engage stakeholders, produce clear technical documentation, and lead architectural initiatives while guiding governance and roadmapping efforts.

Qualifications

• Degree in a relevant discipline or equivalent experience.
• Strong analytical and problem-solving skills with architectural capability.
• Excellent communication and stakeholder engagement skills.
• Ability to produce high-quality technical documentation for diverse audiences.
• Ability to lead, mentor and collaborate within high-performing teams.

Responsibilities

• Analyse clients’ business strategy and objectives to identify critical success factors.
• Evaluate and document current IT infrastructure and potential improvements.
• Develop and maintain enterprise architecture models for the client landscape.
• Formulate long-term IT strategies and roadmaps aligned with business goals.
• Guide IT projects to ensure alignment with enterprise architecture and objectives.
• Assess emerging technologies and recommend adoption strategies.
• Communicate with stakeholders across levels to ensure buy-in.
• Identify IT risks and ensure compliance with regulations.

Skills

Analytical thinking

Communication

Technical documentation

Leadership & mentoring

Education

Degree in Engineering/CS/Info Systems

Equivalent experience

Tools

TOGAF 9

ArchiMate

IT4IT Foundation

Open CA

Unified Architecture Framework

AWS/Azure Certification

Job description

Amentum is a global leader in engineering, project and programme management, and solutions integration. Built on strong programme and engineering delivery experience, supported by deep specialist capabilities, Amentum is a recognised partner across major UK Government and commercial programmes.

People are at the centre of what we do. We offer a competitive package designed to attract and retain talent. In addition to standard benefits, UK employees receive free single medical cover, digital GP services, enhanced family‑friendly policies, employee assistance programmes, and reimbursement for professional development. Our community initiatives include matched‑funding schemes, paid volunteering, and charitable contributions.

About the Opportunity:

Amentum are offering an exciting opportunity to join our growing team of IT professionals to work on a range of projects for our diverse client portfolio that covers Critical National Infrastructure, National Security, Defence and Nuclear market sectors. Our team is growing and are we looking for proactive and collaborative professionals of all levels to work within us in providing a range of services to our clients. With our deep technical, commercial, and strategic expertise we develop solutions that address our client’s critical challenges supporting digitalisation and security.

We are looking for an individual to join our team as an Enterprise Architect helping to shape our clients’ IT infrastructures. You will align client IT architectures with their business goals and objectives, playing a crucial role in ensuring that IT systems and processes support clients’ overall strategies and enabling them to achieve long‑term objectives.

Key Responsibilities:

• Business Strategy Alignment: Analyse clients’ business strategy and objectives, identifying critical success factors and areas where IT can contribute to achieving them.
• IT Infrastructure and Systems: Evaluate clients’ existing IT infrastructure, including hardware, software, and network components, assessing its effectiveness and identifying areas for improvement.
• Enterprise Architecture Modelling: Develop and maintain comprehensive enterprise architecture models that represent clients’ IT landscapes, including business processes, data flows, and technology components.
• IT Strategy and Roadmap: Formulate long‑term IT strategies that align with clients’ business goals and objectives, outlining future investments, initiatives, and technology adoption plans.
• Project Governance and Oversight: Guide and oversee IT projects throughout their lifecycle, ensuring that they align with the enterprise architecture and business objectives.
• Innovation and Technology Assessment: Stay abreast of emerging technologies and trends, evaluating their potential impact on the organisation and recommending appropriate adoption strategies.
• Communication and Stakeholder Management: Communicate effectively with stakeholders across different levels of the clients’ organisation, including executives, business units, and IT teams, to ensure alignment and buy‑in.
• Risk Management and Compliance: Identify and assess IT‑related risks, develop mitigation strategies, and ensure compliance with relevant industry regulations and standards.
• Continuous Improvement: Continuously evaluate and enhance clients’ IT architectures, ensuring that they remains aligned with business needs and adapting to evolving business conditions.

Here’s What You’ll Need:

• Degree qualified in a relevant discipline (e.g. Engineering, Computer Science, Information Systems) or equivalent experience.
• Strong analytical and problem‑solving skills, with the ability to architect solutions to complex challenges.
• Excellent communication and stakeholder engagement skills, with the ability to influence at all levels.
• Ability to produce high‑quality technical documentation for both technical and non‑technical audiences.
• Ability to lead, mentor, and collaborate within high‑performing teams.

Experience:

• Experience working within the UK MOD or Critical National Infrastructure.
• At least 5 years’ experience working on Defence or CNI IT systems.

Standards & Frameworks:

Desirable qualifications/certifications (any of):

• TOGAF 9.
• Unified Architecture Framework.
• Open Group Certified Architect (Open CA).
• ArchiMate Certified Expert.
• IT4IT Foundation.
• Certified Solution Architect: AWS or Azure.

Our Culture:

Our values stand on a foundation of safety, integrity, inclusion, and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we are more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centred on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit Promoting Equality & Diversity in Jobs and Career - VERCIDA to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

Your application experience is important to us and we’re keen to adapt to make every interaction even better. We welcome feedback on our recruitment process and if you need more from us before deciding to join us then please let us know.