We are currently looking for a Medior System Engineer (Windows / Citrix) to join a team within a large international infrastructure environment. You will be responsible for the day-to-day operational management of Windows and Citrix server environments. This is an operational role — not an architect position. Key responsibilities Provide support for complex infrastructure incidents Investigate and resolve Windows & Citrix environment issues Ensure stability, availability, and performance of server platforms Document processes and technical procedures Work closely with helpdesk and infrastructure teams Technical scope 80% Windows Server )20% Citrix (Virtual Apps & Desktops, Delivery Controllers, Storefront, Workspace, Director, Studio, NetScaler) Good understanding of networking & security principles Nice to Have: Active Directory, VMware, SCCM/SCOM, Exchange, PowerShell, monitoring tools, Storage knowledge. Practical information Location: Brussels area (2-3 days onsite) Start: March 2026 Long-term contract (yearly renewable)