About the Role

We are seeking a Senior IT System Administrator with strong expertise in Citrix XenApp and a broad range of skills across Microsoft technologies, Azure, Office 365, VMware (vSAN), and basic networking. You will play a critical role in both day-to-day operations and strategic IT projects across our infrastructure.

Key Responsibilities
 

• Administer, maintain, and optimize Citrix XenApp environments
• Manage and support Microsoft infrastructure, including Active Directory, Group Policy, and Windows Server
• Oversee Azure cloud environments and Office 365 tenant configurations Administer and troubleshoot VMware vSphere and vSAN clusters
• Assist in the design and implementation of network configurations (basic networking knowledge required)
• Lead IT infrastructure projects: define scope, allocate resources, manage timelines, and report on progress
• Ensure system security, reliability, and compliance
• Document procedures and configurations; contribute to continuous improvement of IT operations
• Collaborate with support and development teams; act as L3 escalation point

Required Skills and Experience
 

• Proven experience managing Citrix XenApp environments (design, deployment, support)
• Strong experience with Microsoft technologies: Windows Server, Active Directory, Group Policies
• Solid knowledge of Azure, Office 365, and hybrid environments
• Proficiency in VMware (especially vSAN)
• Understanding of networking fundamentals (VLANs, firewalls, routing)
• Experience leading or coordinating IT projects
• Ability to work independently and manage multiple priorities
• Excellent problem-solving and analytical skills

Languages
 

• English: fluent (mandatory for documentation and coordination)
• French: highly preferred (entire internal team is French-speaking)
• Dutch: a plus (especially for Belgian site coordination)

What we offer
 

• A dynamic working environment in a multisite European company
• Opportunities to lead impactful projects and grow your expertise
• Supportive, French-speaking team with strong technical capabilities
• Competitive salary
• Company Car