Principal Network EngineerPermanent | £70,000 - £100,000 | Bristol (Hybrid)We are seeking a Principal Network Engineer to join an advanced engineering team building secure and resilient communications systems. You will design distributed network architectures, develop secure connectivity solutions, and provide technical leadership across complex networking projects.Key ResponsibilitiesDesign and implement scalable network architecturesDevelop secure overlay and software-defined networking solutionsOwn routing, traffic engineering, and network performanceBuild network observability and monitoring capabilitiesProduce architecture documentation and provide technical leadershipCollaborate with stakeholders to deliver robust networking solutionsSkills andamp; ExperienceStrong networking fundamentals including routing and L2/L3 technologiesExperience with overlay networking and VPN technologiesStrong Linux networking knowledgeExperience with automation and infrastructure-as-codeFamiliarity with secure network architectures and PKIAbility to lead technically while remaining hands-onMust be eligible for SC clearanceDesirableExperience with wireless or distributed networking environmentsBackground in telecommunications, defence, or critical infrastructureKnowledge of network telemetry and observability platforms