Senior Consultant - IT System Engineer, Infrastructure (Security Clearance)

You run and evolve the whole infrastructure, from daily operations to migrations, so the platform stays available, secure and documented.

Adservio Luxembourg Adservio Luxembourg is the Luxembourg arm of Adservio Group 300 + consultants across Paris, Brussels and Luxembourg, 15 years serving regulated industries. We opened in Luxembourg in 2022 and work across financial services, energy and utilities, transport and mobility, insurance and the public sector. You join our Technologies & Engineering team. The context With our team, you work for an international organisation in the defence sector, based in Luxembourg. You sit within the platform team that runs its IT infrastructure, in a security-classified environment where availability and information security are not negotiable. The role is full-time on-site and requires a security clearance. Your mission You run and evolve the whole infrastructure, from daily operations to migrations, so the platform stays available, secure and documented. Run the infrastructure • Manage and support servers, storage, backups and the local area network, day to day • Administer directory, messaging and remote desktop services across sites Keep the platform available • Operate highly redundant virtualisation clusters and failover clusters, including virtual desktops • Migrate virtual and physical machines with no loss of service Secure and maintain • Manage anti-virus protection, hardening and product updates across the estate • Analyse needs, propose infrastructure solutions and document what you put in place Your profile What is essential • At least 7 years in IT, including 5 years designing and managing complex IT infrastructures, network and security included • A valid NATO SECRET security clearance, or a dormant clearance that can be reactivated • Windows Server and workstation systems, multi-site Active Directory (DNS, DHCP, GPO), Exchange and Remote Desktop Services farms • VMware vSphere 6 or later in multi-site clusters, Hyper-V and VDI, plus Microsoft failover clustering • Solid hardware knowledge, and no reluctance to work hands-on with physical equipment What makes the difference • Certification on Windows Server 2016 or Microsoft Exchange • Patch and update management at scale, for example with WSUS • Previous work for an international organisation or in a defence environment Languages Required: fluent professional English · Asset: French, German or any other language What you find with us A tribe. You join our infrastructure and operations community: senior peers, peer reviews and shared technology watch. Recognised expertise. Subject Matter Expert is a real status with us: other consultants and group clients come to our experts. Regulated environments, across sectors. Your work sits where compliance is not optional and failure is not acceptable. The operating discipline you apply here carries over to our work in energy, transport and the public sector. A practice still being built, with a clear path. Our Luxembourg office opened in 2022 and is backed by a group of 300+ consultants: what you help set up becomes the way we work. Our grade framework is explicit, with an expert track if you prefer depth over management. The process Application → HR conversation → Technical interview with your future peers → Feedback and decision. Whatever the outcome, you will get an answer.