Contract Spy
London Area, United Kingdom
Job Title: Senior Firewall & Network Security Engineer Location: London Position Type: Contract Overview We are seeking an experienced Senior Firewall & Network Security Engineer with deep expertise in the Fortinet ecosystem to join our infrastructure security team. In this role, you will design, manage, and continuously improve enterprise-grade firewall infrastructure, lead firmware upgrade cycles, drive automation initiatives, and serve as the subject-matter expert on FortiGate platforms — including the 1500D and 1800F series. You will work cross-functionally with network, cloud, and compliance teams, operating within ITIL-aligned change management processes. Key responsibilities: Own end-to-end management of enterprise FortiGate firewalls (1000-series and above) across production and non-production environments, including VDOM configuration, HA setup, and policy routing. Plan and execute FortiOS major-version upgrade paths (e.g., 6.x → 7.x) in production,...