Job Vacancy Network Architect (Security Clearance)

In this role, you will lead the redesign and optimisation of complex, multi-environment network architectures, focusing on modernising connectivity across air-gapped and virtualised infrastructures. You’ll take ownership of technical direction, ensuring secure, high-performing designs that meet both client and programme objectives. Working closely with infrastructure, test, and security teams, you’ll produce high-quality technical documentation and guide implementation through to validation and delivery.



You’ll have the opportunity to shape secure network solutions that balance innovation and reliability, collaborating within a supportive environment that values initiative, creative problem-solving, and precision in execution.



Key responsibilities:



Lead & Innovate: Redesign existing network architecture integrating modern layer 3 switches, layer 2 switches, routers, and firewalls.



Design & Deliver: Produce detailed High-Level (HLD) and Low-Level (LLD) network designs, ensuring alignment with secure system requirements.



Collaborate & Support: Partner with test teams to provide consultation on appropriate test design and validation approaches.



Optimise & Automate: Enhance network performance and reliability through modernisation and configuration best practice.



Advise & Influence: Serve as a technical authority on network security, architecture, and system interconnectivity.

Required qualifications to be successful in this role

You should bring strong experience in designing and implementing secure, virtualised network architectures, with deep knowledge of routing, switching, and firewall configurations. A proactive, detail-focused approach and the ability to work in a highly secure, collaborative environment are essential.



Essential skills and experience:



Proven experience designing and deploying complex, secure network architectures.



Strong understanding of Layer 2 and Layer 3 switching and routing principles.



Hands-on experience with Juniper SRX firewalls (e.g., SRX240) and Cisco Layer 2 switches (e.g., Cisco 2960).



Experience with Dell switches, VMware virtualisation, and Windows Server environments.



Familiarity with Mini Catapans or similar air-gapped networking solutions.



Ability to produce detailed HLD/LLD documentation and collaborate effectively with testing and implementation teams.



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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.