Job title: Network Engineer / Network Designer (Contract) Duration: 3 months initially, with potential extensions Location: London (Hybrid)Role Overview A Network Engineer / Network Designer is required to deliver project-based network and security changes within a large, distributed retail organisation. This role focuses solely on project delivery, with no BAU or operational support responsibilities. The contractor will work under general direction, taking responsibility for their own deliverables and ensuring that all design output, configuration artefacts, and documentation updates are accurate, consistent, and aligned with established standards. The work will involve contributing to network designs, implementing planned configuration changes, and updating documentation across hybrid cloud and on?premises environments. Technologies include Cisco ACI, Juniper Mist, Fortinet FortiGate, Palo Alto Networks, Zscaler (ZIA/ZPA), Azure networking, F5 LTM, and automation tooling such as Python, GitHub, and Terraform.Key Responsibilities Network Design and DocumentationProduce and update high?quality network documentation, including HLDs, LLDs, diagrams, and configuration specifications.Apply established design patterns for routing, segmentation, cloud connectivity, and secure access.Document changes clearly and consistently, ensuring traceability across project phases.Contribute to designs for Cisco ACI, including application profiles, endpoint groups, and policy models.Contribute