Infrastructure Engineers

We're building a new team of Senior Infrastructure Engineers, including Network Engineer & IAM/IDAM Engineers to deliver a transformative integration project that will redefine infrastructure across our Aerospace, Defence & Security sector. We're seeking skilled Infrastructure Engineers with deep expertise in network engineering to support the implementation of a secure, fully functional on-premises domain for a leading Defence and Space client. You'll be responsible for executing a pre-approved infrastructure design, with a particular focus on network architecture, connectivity, and security.

This role demands hands-on experience with enterprise-grade networking technologies, secure routing and switching, and integration with authentication and directory services. You'll collaborate closely with architects, other infrastructure teams, and client stakeholders to deliver a resilient and compliant network foundation.

You will be office-based at one of our sites in Stevenage, Portsmouth, or Newport, with some flexibility to work from home.

We can offer great career progression opportunities, ability to be based anywhere across the UK, benefits which you can flex to meet your needs and training and development opportunities.

What you'll be doing:

• Implement Network Infrastructure Design -Deploy and configure network components in line with a pre-approved architecture, ensuring performance, scalability, and Defence-grade security.
• Secure Network Configuration - Configure firewalls, routers, switches, and access control lists (ACLs) to enforce segmentation, traffic filtering, and secure communication across the domain.
• Domain Connectivity & Integration - Support the integration of network services with Active Directory, DNS, DHCP, and certificate services to enable seamless domain functionality.
• Monitoring & Troubleshooting - Implement network monitoring tools, diagnose connectivity issues, and optimise performance across LAN/WAN environments.
• Security & Compliance Enforcement - Apply regulatory and client-specific security controls, including encryption, IDS/IPS, and logging mechanisms.
• Stakeholder Collaboration - Work alongside infrastructure architects, other infrastructure teams, and client-side stakeholders to ensure smooth implementation and rapid issue resolution.
• Documentation & Handover - Produce detailed network diagrams, configuration documentation, and operational procedures to support long-term maintenance and knowledge transfer.

• CCNA accreditation
• Strong knowledge and experience with Cisco technologies, including:
• Routing/Switching (IOS/NX-OS)
• Firewall skills - Cisco ASA
• Data and Voice Cable Installation, Patching/Jumpering and Fault Finding
• Experience with infrastructure tooling such as OTDR and Cat5/6 cable test equipment

Would be great if you had:

• Prior experience in Defence, Aerospace, or Government projects
• Familiarity with network tooling such as Cisco Prime, Ops View (or similar)
• Working knowledge of Cisco Wireless networking applications and devices
• Exposure to Zero Trust principles and secure enclave architectures

If you are interested in this role but not sure if your skills and experience are exactly what we're looking for, please do apply, we'd love to hear from you!

Although this role is advertised as full-time, we believe that flexibility at work can promote work/life balance, increase your motivation, reduce stress and improves performance and productivity. We support different ways of working and can offer a range of flexible working arrangements. So, if you're interested and need to work flexibly, we encourage you to apply and talk to us about what might be possible.

Sopra Steria's Aerospace, Defence and Security business designs, develops and deploys digital solutions to Central Government clients. The work we do makes a real difference to the client's goal of National Security, and we operate in a unique and privileged environment. We are given time for professional development activities, and we coach and mentor our colleagues, sharing knowledge and learning from each other. We foster a culture in which employees feel valued and supported and have pride in their work for, Sopra Steria, a European leader in consulting, digital services and software development, helps its clients drive their digital transformation to obtain tangible and sustainable benefits. It provides end-to-end solutions to make large companies and organisations more competitive by combining in-depth knowledge of a wide range of business sectors and innovative technologies with a fully collaborative approach. Sopra Steria places people at the heart of everything it does and is committed to making the most of digital technology to build a positive future for its clients. The world is how we shape it. Join us now At Sopra Steria, we strive to create an inspiring team environment and an arena for freedom and discussion that fosters skill development and entrepreneurship within a community driven by our desire to succeed together. In addition to technology, we believe that collective intelligence, team spirit and everybody's individual talent, can help to transform and move the world forward on a lasting basis. We encourage our employees to be bold, curious, and accountable in order to explore new avenues and capitalise on innovative technologies, which will bring positive change for all.