Location: Corsham, Wiltshire, South West, UKSenior IT Infrastructure Engineer - Onsite, SN13£45,000 - £65,00025 Days annual leaveBuy or sell up to 5 days' annual leaveAnnual wellbeing allowanceTwo pension schemes to choose fromPrivate medical insurance + Discounts for additional family membersPrivate DentalLife assurance scheme up to 4x salaryShare save schemeElectric/Hybrid car leasing schemeCycle to work schemeRetail discountsWere looking for a dependable and hands-on Senior IT Infrastructure Engineerto help maintain and enhance our secure on-premise environment. From complex third-line issue resolution to the delivery of infrastructure improvements, this is a varied and rewarding role with a strong focus on storage, backup, and virtualisationtechnologies. If youre methodical in your work, calm under pressure, and take pride in running reliable systems, this could be your next move.This is a position for a seasoned infrastructure engineer whos confident managing enterprise-grade systems in a secure or air-gapped environment. Youll take ownership of critical infrastructure components, support major upgrades, and play an active role in ensuring performance, availability, and data integrity across our physical and virtual platforms.Your day will involve maintaining storage arrays, administering backup & replication, managing Windows Server and VMware environments, and contributing to the continuous improvement of our infrastructure. Youll work closely with colleagues across the IT function, supporting service delivery and project activity in a collaborative, high-trust setting.How youll support usYoull provide dependable third-line support, diagnosing and resolving issues across servers, storage, and backup systems. Day to day, youll maintain and enhance Microsoft Windows Server, Active Directory, and VMwareenvironments, while managing HP storageand Veeam backupplatforms to safeguard data and maintain business continuity. Youll take ownership of maintenance schedules, patching, and change activity, ensuring that our infrastructure remains secure, resilient, and well-documented. Youll also contribute to service stability and continuous improvement by identifying root causes, implementing permanent fixes, and helping to optimise performance and reliability.Essential experienceProven experience in server infrastructure administration and third-line supportStrong knowledge of Microsoft Windows Server(including Active Directory and Group Policy)Practical experience with VMwaretechnologies (vSphere, ESXi, vCenter)Hands-on expertise with HP storage platforms(e.g. 3PAR, Primera, Alletra)Solid working knowledge of Veeam Backup & Replicationfor backup and disaster recoveryUnderstanding of change, incident, and problem management processesDesirable experienceExperience with Windows Server roles such as DFS, and DNSFamiliarity with performance monitoring and capacity planning for storage and backup systemsExperience developing automation or scripting for routine maintenance tasksITIL Foundation or equivalent service management certificationDue to the highly-secure nature of the projects you will be involved with, you must be eligible to work in the UK and be eligible to undergo and maintain UK government DV Clearance.Who is MASS?MASS is an independent, global technology company, trusted by highly-secure organisations to provide advanced, digital services that manage data and keep information safe. With our heritage in defence, we offer robust solutions to sectors where security expertise is essential. We work in partnership with customers, using skilled, technical experts. We think innovatively to provide tailored, agile and resilient solutions that secure advantage, so youre ready for digital transformation.MASS is an equal opportunities employer; we know that our people are smart, skilled and motivated and in return we provide a friendly workplace where everyone is valued and has the chance to make an impact.Apply todayto see how working for MASS could work for you!TPBN1_UKTJ