Senior IT Engineer

Senior IT Engineer The Role ADS is seeking an experienced and hands-on Senior IT Engineer to play a leading role in the development, resilience and modernisation of the Group’s IT infrastructure. Reporting to the Head of IT and Information Security, the Senior IT Engineer will be responsible for supporting ADS’s core on-premise infrastructure while leading the design and delivery of its migration from on-premise Active Directory to Microsoft Entra. The role will help ensure that technology services remain secure, reliable and responsive throughout the transition, with minimal disruption to the organisation. This is a varied and highly practical role covering Active Directory, VMware ESXi, Microsoft 365, Entra ID, Intune, network infrastructure, backups and email security. The successful candidate will take ownership of agreed technical areas, resolve escalated issues and work closely with colleagues, stakeholders and external suppliers to maintain service continuity and deliver infrastructure improvements. Alongside the migration programme, the Senior IT Engineer will support business-asusual IT operations, contribute to disaster recovery planning and help maintain the technical controls required for Cyber Essentials Plus and ISO 27001. Security, documentation and knowledge-sharing will be central to the role, ensuring that systems are supported effectively and knowledge is embedded across the wider IT team. The role is based in Farnborough and will involve occasional travel to the London office and potentially the Toulouse office to support infrastructure projects and changes. The Person We are seeking an experienced infrastructure professional with demonstrable experience of designing and delivering an on-premise Active Directory to Microsoft Entra migration, ideally through the full project lifecycle rather than solely through the administration of an established Entra environment. The successful candidate will have strong technical experience across Active Directory, Group Policy, Microsoft 365, Entra ID and Intune, together with a solid understanding of Windows Server, VMware ESXi, network configuration and Cisco switching. Experience of mobile device management, including Apple devices, and email security technologies such as Mimecast, SPF, DKIM and DMARC will also be important. You will have a practical understanding of information security principles and frameworks, including Cyber Essentials and ISO 27001, and will be comfortable ensuring that security and governance requirements are built into technical solutions from the outset. Knowledge of public DNS management, Cloudflare, network technologies and data circuits would be beneficial. This role would suit someone who is comfortable working independently, balancing strategic infrastructure projects with day-to-day operational demands and acting as a point of technical escalation. Strong communication and stakeholder-management skills are essential, including the ability to explain complex technical issues clearly to non-technical colleagues and work effectively with third-party suppliers. The Contract & Benefits Contract Type; Permanent, full-time role Location; Farnborough, Hampshire, with occasional travel to the London office Company Description ADS represents and supports around 2,000 UK businesses operating in the aerospace, defence, security and space sectors. Whether representing industry, connecting our members with business opportunities or driving forward innovation and growth, ADS is at the forefront of an array of activities, events and programmes that benefit our members. Our membership ranges from major multinational businesses with substantial UK presences to hundreds of small and medium-sized companies in every part of the country. We are an organisation that aims to deliver to the highest standards and have successfully achieved accreditation to the ISO 27001:2022 Standard and Cyber Essentials Plus