Salary: £29,000 - 55,000 per year Requirements: Expert knowledge of SD-WAN technologies, particularly Fortinet Secure SD-WAN (FortiGate, FortiManager, FortiAnalyzer) Fortinet Expert Certification (FCSS) Fortinet SD-WAN design and delivery experience Deep understanding of network security principles (firewalls, VPNs, segmentation, zero trust concepts) Experience designing large-scale, resilient, multi-site network architectures Strong ability to produce HLDs, LLDs, and technical design documentation Excellent troubleshooting and performance optimisation skills Strong stakeholder management and communication skills (technical and non-technical audiences) Responsibilities: Lead the end-to-end design of secure SD-WAN solutions using Fortinet Secure SD-WAN. Define scalable, resilient architectures tailored for enterprise and public sector clients. Ensure alignment with customer requirements, SLAs, and regulatory standards. Act as the subject matter expert (SME) for Fortinet SD-WAN technologies. Provide guidance and mentoring to engineers and architects across projects. Drive best practices in network design, security integration, and automation. Act as the last line technical lead to resolve technical problems, either design or support related problems. Assist in the build and design of Proof-of-Concept scenarios, Type Approval activities in the Telent labs, and support in the creation of test type documentation and test scenarios. Technologies: FortiGate Support Network Security More: At Telent, we are proud to empower innovation within our Engineering Team, where you will collaborate with technical experts dedicated to making a critical impact. As a Principal Engineer focused on Fortinet solutions, you will be part of a hybrid working environment, with a small requirement to be in our Farnborough office monthly. We offer a diversity of opportunities, nurturing talent while fostering an inclusive culture. Our benefits include extensive holiday options, a company pension scheme, family-friendly policies, occupational health support, and discounts through our Telent Reward scheme. last updated 16 week of 2026