Salary: £? - ? per year Requirements: Deep technical expertise in Zscaler ZIA and ZPA, with CASB desirable Deep technical expertise in identity integration, including Entra ID, SSO, SCIM, and Conditional Access Deep technical expertise in Azure IaaS and networking, including VPN Gateway, routing, and connectivity design Strong working knowledge of enterprise networking, including routing, switching, and firewalls Strong working knowledge of security operations, logging, and SIEM integration Proven experience leading engineering teams across infrastructure, network, or security transformations Strong data handling capability, including advanced Excel for engineering control and analysis Ability to operate effectively within ambiguous, evolving technical environments Responsibilities: Provide hands-on technical leadership across Infrastructure and Network Engineering teams, guiding them in resolving technical issues and design challenges Provide subject matter expertise across Zscaler ZIA, ZPA, CASB, and Azure Review relevant Zscaler designs and act as the escalation point for technical migration challenges Work with the project manager to plan and oversee execution of the proxy migration workstream across on-premises and Azure estates Manage migration waves, cutover activities, and rollback planning Ensure minimal service disruption and alignment with security standards Coordinate interdependencies with infrastructure, application, and network teams Own and govern the core engineering dataset supporting migration Develop and maintain technical artefacts and engineering controls to support engineering decision-making Provide technical assurance and reporting into the project manager Identify and manage technical risks, issues, and constraints Ensure consistency and quality across project engineering outputs Deliver technical server migration control datasets Maintain and validate migration datasets Produce technical progress reporting covering status, risks, issues, and dependencies Support successful migration of in-scope services to ZIA Carry out post-migration validation and issue resolution Technologies: Azure Excel IaaS Support Network Project Manager Security VPN Web Cloud DevOps More: We are recruiting a Zscaler Engineer to join our Cyber team on a 6-month contract basis. The role is based in Preston with ad hoc travel to site and is mainly remote. This is an inside IR35 day-rate contract supporting a structured delivery environment, where we are migrating web proxy services from a legacy Trend solution to Zscaler Internet Access (ZIA) and need strong technical leadership, coordination, and delivery support. last updated 24 week of 2026