Senior 3rd-Line Security Engineer Onsite 24x7

BT Group in Derby is seeking a 3rd Line Security Specialist to provide lead technical support on complex security issues in an on-site BN/air-gapped environment. You will coordinate with BT personnel and 3rd party engineers to meet tight SLAs and KPIs.

The role requires SME-level knowledge of diverse security products and the ability to run teleconferences, RCA work, and PIRs while maintaining top-tier customer experience. Eligibility for UK government clearance is essential.