Network Security Engineer Network Security / Penetration Testing / CREST / CSTL / API Testing / Config Reviews / Infrastructure / Outside IR35 / West London We’re seeking an experienced Network Security Engineer to support a major multi-phase security testing project. You’ll conduct penetration tests, configuration reviews, and infrastructure assessments, contributing to a high-profile programme of work extending into next year. Required Strong background in network and infrastructure security. Experience performing penetration testing, configuration reviews, and API testing. Knowledge of “classic” CHECK-style testing methodologies. CREST, CSTL or CTL certification (Team Member or Team Leader level). Ability to deliver high-quality reports and communicate technical findings clearly. Hands-on experience across infrastructure, networking, and external testing. Desirable Experience working within CHECK or other accredited testing schemes. Strong understanding of secure network architecture and hardening practices. Previous consultancy or project-based testing experience. Contract Details Outside IR35 West London (on-site presence required for majority of testing) 0-hours contract – project-based work, phase by phase Initial phase focused on network testing, with further phases planned into next year Day Rate: Competitive Start: ASAP 1-Stage Interview Process with consultancy SME Please apply now or contact me directly if this role looks like a good fit. From there I’ll be in touch to discuss the opportunity in more detail. Network Security / Penetration Testing / CREST / CSTL / CTL / API Testing / Config Reviews / Infrastructure / Outside IR35 / West London