3rd Line Infrastructure Engineer (SC Cleared/DV Eligible) Derby (Onsite) Competitive Salary + Excellent Benefits Current SC Clearance Required (and willing to Obtain DV)Join a Team Supporting Critical National InfrastructureAn exciting opportunity has arisen for an experienced 3rd Line Infrastructure Engineer to join a highly secure, enterprise-scale environment supporting business-critical services. This position offers the chance to work with cutting-edge Microsoft infrastructure technologies within a collaborative technical team, helping to maintain, improve and modernise a complex IT estate.This role is ideal for a technically capable engineer who enjoys solving challenging infrastructure issues, contributing to technical projects and working within a security-conscious environment where reliability and service excellence are paramount.The RoleAs a 3rd Line Infrastructure Engineer, you''ll provide advanced support across a large-scale Microsoft-based infrastructure, acting as an escalation point for complex technical issues while supporting ongoing platform development and improvement initiatives. Key responsibilities include:Providing expert-level troubleshooting and incident resolution.Delivering solutions and workarounds to minimise service disruption.Supporting and maintaining critical Windows Server environments.Managing and prioritising multiple technical tasks and projects.Collaborating closely with customers, stakeholders and wider technical teams.Reviewing ..... full job details .....