Solution Architect

Amentum; Cardiff; On-site; GBP 75,000 - 120,000; Full time

Benefits offered by this job

Medical cover

Digital GP

Family-friendly policies

Employee assistance programmes

Professional development reimbursement

Matched-funding schemes

Paid volunteering

Charitable contributions

Job summary

Amentum is seeking an experienced IT Architect to join our Cardiff-based team working across Defence, Nuclear and critical national infrastructure projects. You will define IT architecture, translate requirements into blueprints, and drive scalable, secure solutions.

The role requires five years of delivering complex IT systems, strong stakeholder engagement, and the ability to mentor teams. You will collaborate across disciplines to ensure safety, security by design, and alignment with

Qualifications

• At least 5 years designing and delivering complex IT systems in defence or high-assurance environments.
• Proven ownership of solution architecture across the full systems engineering lifecycle.
• Experience with UK MOD customers or similar organisations.
• Deep IT knowledge across software, networks, data management, virtualization and cloud.

Responsibilities

• Defining IT architecture: analyse business requirements, identify technical solutions and create blueprints.
• Designing and developing IT systems: translate architectures into software, networks and data systems.
• Overseeing system performance: monitor, identify bottlenecks and ensure scalability and stability.
• Enhancing security and compliance: implement security controls and ensure compliance with standards.
• Communicating technical concepts to stakeholders and resolving issues clearly.
• Staying up-to-date with new technologies and industry standards.

Skills

Solution architecture

Systems engineering

Cloud computing

Security by design

Stakeholder communication

Tools

TOGAF

UAF

UML

Sparx EA

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.

We offer a competitive package designed to attract and retain talent.

• free single medical cover
• digital GP services
• enhanced family-friendly policies
• employee assistance programmes
• reimbursement for professional development

• matched-funding schemes
• paid volunteering
• 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.

Key Responsibilities

• Defining IT architecture: Analyse business requirements, identify technical solutions, and create comprehensive IT architecture blueprints. Document the overall structure, components, and interactions of the IT system, ensuring that it aligns with the organisation's overall strategy and objectives.
• Designing and developing IT systems: Translate IT architecture blueprints into tangible IT systems. Design, develop, and implement software applications, network infrastructure, and data management systems, ensuring that they meet performance, security, and scalability requirements.
• Overseeing system performance: Monitor the performance of IT systems, identify potential bottlenecks, and implement corrective measures. Ensure that systems are scalable and can handle increasing workloads without compromising performance or stability.
• Enhancing security and compliance: Implement security protocols, data encryption, and access controls to protect sensitive information and comply with industry regulations. Stay abreast of emerging security threats and vulnerabilities, ensuring that systems are adequately protected.
• Communicating technical concepts: Effectively communicate complex technical concepts to both technical and non-technical stakeholders. Explain technical designs, provide project updates, and resolve technical issues in a clear and concise manner.
• Staying up-to-date with technology: Constantly research and evaluate new technologies, trends, and industry standards. Incorporate the latest advancements into their designs and implementations, ensuring that IT systems remain relevant and effective.

Here’s What You’ll Need

General

• 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

• At least 5 years’ experience designing and delivering complex IT systems, ideally within Defence or high-assurance environments.
• Proven experience owning solution architecture and delivering outcomes across the full systems engineering lifecycle.
• Experience working with UK MOD customers (e.g., DE&S, Defence Digital) or similar organisations.
• Extensive IT knowledge: Possess deep expertise in a wide range of IT domains, including software development, network infrastructure, data management, virtualisation, and cloud computing.
• Continuous learning: Stay up-to-date with the rapidly evolving IT landscape, which requires continuous learning and adaptation. Be eager to learn new technologies and trends.

Frameworks, Tools & Technologies

• Architecture frameworks such as TOGAF, UAF, or equivalent.
• Modelling languages such as UML, SysML.
• Experience with modelling tools such as Sparx EA or equivalent.

Security & Compliance

• Strong understanding of security principles in Defence IT systems, including Secure by Design.
• Familiarity with relevant standards (e.g., JSP 440, JSP 604, ISO 27001, NIST).

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.