OverviewOur client, a prominent organisation within the Defence & Security sector, is currently seeking a Senior IT Infrastructure & Support Engineer for a permanent position. This role is pivotal in ensuring the reliability, security, and efficiency of the organisation's IT systems, contributing significantly to the resilience of business-critical systems, including ERP and cybersecurity tools. The role also involves maintaining and developing core infrastructure while fostering the professional growth of the IT team.ResponsibilitiesProvide high-level technical support across the business, including troubleshooting complex issues with infrastructure, applications, and user devices.Maintain and support key systems such as Active Directory, Azure, Exchange Online, virtualised environments (Hyper-V), and backup solutions.Contribute to the security and stability of the organisation's IT estate by supporting cybersecurity tools and policies.Collaborate with the wider IT team on system improvements, deployments, and technical projects.Proactively identify areas for automation, standardisation, or process improvement within IT operations.Act as a technical mentor to junior team members, providing guidance, informal training, and support with their development goals.Document solutions, processes, and best practices to build team knowledge and reduce single points of failure.Participate in disaster recovery planning, testing, and service continuity initiatives.Essential Skills & ExperienceStrong experience with Windows Server environments, including Active Directory, Group Policy, DNS/DHCP, and file/print services.Excellent understanding of Azure AD, Exchange Online, Office 365, and cloud identity concepts.Working knowledge of Hyper-V, Veeam, WSUS, certificate services, and endpoint management tools (e.g. ManageEngine).Familiarity with security tools and concepts, such as endpoint protection, email filtering, SIEM/monitoring, or extended AV tools.Understanding of network fundamentals (TCP/IP, VLANs, firewalls) and general troubleshooting.DesirableExperience using collaboration and tracking tools like Jira and Confluence.Experience with ERP systems, including maintaining, supporting day-to-day user support and system admin functions.Personal AttributesStrong technical problem-solving ability and a desire to continuously improve IT systems and support.Clear and confident communication with both technical and non-technical audiences.Proactive, organised, and capable of managing own workload while supporting others.Willingness to share knowledge and coach others without formal line management responsibilities.Committed to high standards of IT service delivery and information security.Highly organised and methodical approach, with an eye for detail.The ability to work independently when required.A flexible, conscientious, and diligent attitude.Excellent communication, interpersonal and written skills.A resilient and adaptable approach.Work Life Balance37.5 hour working weekProvide regular out-of-hours support for planned maintenance or critical issues.Lunchtime finishes on a FridayHybrid / flexible working arrangements28 days annual leaveChristmas closureHoliday purchasing schemeBenefitsGroup pension plan - matched contributions up to 5%Income protection schemeEmployee Assistance Programme including remote GP service, second opinion, mental health pathway service, and physiotherapy consultationsLife assurance policy, including bereavement counselling and probate helplineCompany shares incentive plan and save as you earn schemeElectric vehicle salary sacrifice schemeWellbeing initiatives, including access to a wellbeing app and mental health support for all employeesRegular sports and social activitiesGym membership discountsReward platform offering high street discounts, employee benefits, and health and wellbeing offeringsRecruitment referral bonus schemeExcellent learning & development opportunitiesGreat working environment with free, onsite car parkingSecurity Clearance RequirementsDue to the nature of our business, staff need to be able to obtain UK Security Clearance as a mandated requirement. Therefore, if successful, you will need to provide proof of identity, employment history, and right to work in the UK, along with proof of UK residency for at least five years.If you are a skilled IT professional looking to advance your career within the Defence & Security sector, we encourage you to apply now to join our client's dynamic team. #J-18808-Ljbffr