Salary: £48,000 - £52,000 per annum Working Hours: Permanent, Full Time, 40 hours per week, Monday to Friday Location: Cheltenham, Gloucestershire Excellent benefits package including 2.5% Golden Hello payment on commencement of employment and up to £2,000 annual retention bonus subject to eligibility criteria (pro-rata for part time employees), subject to achieving and maintaining clearance requirements. G4S Facilities Management are recruiting a 3rd Line Infrastructure Engineer on a full-time, permanent basis based in Cheltenham to provide on-site technical support for server infrastructure and LAN/WAN networks. Responsibilities Investigate, diagnose, and resolve complex technical problems that 1st or 2nd Line Support cannot handle. Troubleshoot and resolve high-level networking problems, analyse and resolve system hardware defects, ensuring system reliability and performance. Maintain and optimise the organisation & servers, networks, virtualised environments (Hyper- V, VMware ESXi), storage systems (SAN/NAS), and other infrastructure components. Maintain and manage network security, performance, monitoring, and optimisation of our systems To log all calls on the call logging system and maintain complete documentation Supporting IT teams with advanced technical expertise, from safeguarding to network enhancements Working with your IT colleagues, ensure that backups of all business systems are fully managed, maintained, documented and disaster recovery process procedures are regularly reviewed and tested Adherence to all Group Information Security policies and procedures in all aspects of your job role Build and maintain strong relationships with internal and external stakeholders and ensure service excellence is delivered at all times Provide on-call services as part of a shift rotation pattern Essential An understanding of Firewalls, Networking technologies, and Load Balancers. Understanding network protocols (TCP/IP, BGP, OSPF, MPLS) and security best practices. Strong troubleshooting and problem-solving skills across diverse systems, infrastructure, and architecture, including but not limited to Microsoft AD, Group Policy, Windows Desktop & Windows Server OS (2012, 2016, 2022), DNS, DHCP, SCCM & MECM. PowerShell scripting, Linux administration & SAN storage support Virtualisation Technologies and especially in VMware/Hyper-V. Experience in NetApp storage systems and management Previous experience in an IT infrastructure role You will be valued and supported, and provided with first class training and competitive benefits. Benefits While working for G4S, you are entitled to a number of benefits and offers from G4S partners and other organisations, from employee assistance provided through WeCare, to RAC cover and so much more, including the below; 2.5% Golden Hello payment £2,000 annual retention bonus 25 days holiday plus bank holidays Progression, training and development catered to you. Refer A Friend incentives Company pension scheme with employer contributions. G4S Life Assurance Scheme. Subsidised healthcare plan. Charity work- Match-IT and Payroll Giving. Confidential Counselling Services 24/7 support specialising in health and medical Discounts on high street shops and brands including several leading high street brands, retailers and travel suppliers. Please be aware that due to the nature of the business security clearance to a high government level will be required.