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Network Architect (DV Security Clearance)

Chippenham, United Kingdom
Network Engineer Network Architect
Actively hiring

Network Architect (DV Security Clearance)

CGI
Chippenham, United Kingdom
Network Engineer Network Architect
CGI
Actively hiring

hackajob is partnering with CGI to fill this position. Create a profile to be automatically considered for this role—and others that match your experience.

 

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure.

We bring innovation to our clients using proven and emerging technologies, agile delivery processes, and deep expertise across space, defence, intelligence, aerospace, and maritime, all underpinned by our end-to-end cyber capability. We collaborate with global technology companies, cutting-edge SMEs, and academia to deliver the optimal solution for each client.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching), which makes you a CGI Partner rather than just an employee.

We are committed to inclusivity and building a genuinely diverse community of tech talent, and we actively encourage careers in our sector, including for members of the Armed Forces. We are also proud to hold a Gold Award for our support of the Armed Forces Corporate Covenant.

You will be joining an open and collaborative community of experts. We provide full training and support to help you develop your career in whichever direction you choose.

Due to the secure nature of this programme, you will need to hold UK Security Clearance or be eligible to obtain it. This role is based on-site near Chippenham, 5 days per week.


Your future duties and responsibilities

In this role, you will design end-to-end network architectures aligned to system and infrastructure requirements, ensuring solutions are secure, scalable, and optimised across cloud and on-premises environments. You will define standards, patterns, and best practices while guiding implementation to ensure architectural consistency.

You will work closely with engineering and delivery teams to support build and integration activities, ensuring network solutions are implemented correctly within the wider infrastructure. You will also focus on performance optimisation, resolving capacity and latency challenges, and embedding security-by-design principles.

Key responsibilities include:

  • Design & define end-to-end network architecture aligned to system requirements
  • Establish & maintain network standards, patterns, and best practices
  • Guide & support implementation and integration of network solutions
  • Collaborate with delivery teams to ensure correct deployment
  • Optimise network performance, capacity, and efficiency
  • Identify and resolve bottlenecks, latency, and failover challenges
  • Embed security-by-design principles including segmentation and encryption
  • Produce high-quality HLDs, LLDs, and architecture diagrams
  • Contribute to design reviews, governance, and technical assurance

Required qualifications to be successful in this role

You should have strong experience in network architecture within complex infrastructure environments, with deep knowledge of cloud and on-premises networking, security design, and performance optimisation.

You will be confident in communicating technical concepts and contributing to architectural governance and design decisions.

Essential skills:

  • Proven experience in network architecture, ideally within Defence environments
  • Strong knowledge of cloud networking and on-premises network design
  • Deep understanding of networking protocols (VLANs, SNMP, VPNs, TCP, BGP)
  • Expertise in network security design (firewalls, segmentation, zero trust)
  • Experience with Kubernetes, including VKS
  • Ability to produce high-quality architectural documentation
  • Strong stakeholder communication and decision-making skills

Desirable experience

  • Software-defined networking (SDN) and network virtualisation
  • Infrastructure as Code (IaC) for network provisioning
  • Network monitoring and observability tools
  • SD-WAN and EVPN technologies

 

Together, as owners, let’s turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because… You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction. Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise. You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. Come join our team—one of the largest IT and business consulting services firms in the world.

hackajob is partnering with CGI to fill this position. Create a profile to be automatically considered for this role—and others that match your experience.

 

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