Principal Engineer - Fortinet
Reporting into the Head of Focal Engineering, the Fortinet Principal Engineer will be responsible for leading the design and delivery of secure, high-performance Fortinet SD‑WAN solutions for our enterprise and public sector customers.
This is a hybrid role based in our Farnborough office with approximately 2 days per month onsite. Ad‑hoc travel may be required.
What you’ll do
- 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 (design or support)
- 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
Who you are
You are an experienced network and security professional with deep expertise in designing and delivering complex Fortinet SD‑WAN solutions. You have a strong background in enterprise networking and a proven track record of leading technical design from concept through to implementation.
Key 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)
What we offer
- 34 days holiday, including public holidays, with option to buy or sell days annually
- 26 days holiday, plus public holidays, with option to buy or sell days annually
- Company pension scheme
- Range of family‑friendly policies
- Occupational health support and wellbeing portal
- Discounts on cinema, restaurants, and shopping through Telent Reward scheme
Additional benefits
A career at Telent spans many sectors, roles, technologies and clients, offering opportunities to develop new skills and make an impact. We nurture talent in an inclusive culture that respects and values difference, celebrates diverse ideas, and allows everyone to be themselves and thrive at work.
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