4th Line Infrastructure Support Engineer (Windows/VMware/Citrix) Location: Basingstoke, UK (with occasional travel to London)Salary: 55k - 60k + 10% DV BonusClearance: Eligible for DV Clearance About the Opportunity:Join a leading global IT services provider renowned for managing complex and secure systems for high-profile clients. We are seeking a skilled and motivated 4th Line Infrastructure Support Engineer to become a key member of their advanced support function.This is an excellent opportunity to deepen your technical expertise, working alongside dedicated 3rd Line and Engineering teams to resolve complex incidents and ensure the stability of critical infrastructure supporting a significant user community. You will receive specific training on established systems to get you up to speed quickly. Security Clearance:Due to the nature of the end client you will need to be eligible (or currently hold) DV Clearance. The Role:As a 4th Line Infrastructure Support Engineer, you will act as a senior escalation point, tackling complex technical issues primarily within Windows Server, Virtualisation (VMware/Hyper-V), and Citrix environments. You will work closely with engineering teams on underlying problems and provide expert support via the incident management system. Key Responsibilities:Provide expert-level (4th Line) technical support for complex infrastructure incidents.Troubleshoot and resolve issues across Microsoft Windows Server environments (Apply online only , Active Di