Solution Architect in Cardiff

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 is 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 we are 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 supporting ICT infrastructure design activities for a UK defence project. You will act as the bridge between business needs and technical solutions, ensuring that the ICT system design aligns with the client’s organisational goals and effectively supports their business operations.

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.

Qualifications

• 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).

EEO & Inclusion

We partner with VERCIDA to help us attract and retain diverse talent. We are a Disability Confident employer and 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. 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.