Senior IT Infrastructure & Support Engineer

Our 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.

• Provide 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 365, 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

• Strong 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.

Desirable

• Experience 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.

• Strong 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.

• 37.5 hour working week
• Provide regular out-of-hours support for planned maintenance or critical issues.
• Lunchtime finishes on a Friday
• Hybrid / flexible working arrangements
• 28 days annual leave
• Christmas closure
• Holiday purchasing scheme

• Group pension plan - matched contributions up to 5%
• Income protection scheme
• Employee Assistance Programme including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations
• Life assurance policy, including bereavement counselling and probate helpline
• Company shares incentive plan and save as you earn scheme
• Electric vehicle salary sacrifice scheme
• Wellbeing initiatives, including access to a wellbeing app and mental health support for all employees
• Regular sports and social activities
• Gym membership discounts
• Reward platform offering high street discounts, employee benefits, and health and wellbeing offerings
• Recruitment referral bonus scheme
• Excellent learning & development opportunities
• Great working environment with free, onsite car parking

Due 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.