This is a hands-on network role in Brussels with two halves: keep the enterprise network healthy day to day, and help push its infrastructure projects through to acceptance. A multinational defence organisation needs someone who can do both without dropping either.

You would be diagnosing and fixing incidents at first and second line, working on routing, switching and authentication, and supporting Cisco Identity Services Engine administration. Alongside that sits the project side — staging, testing, deploying and migrating equipment, then seeing it accepted into service.

What you would be doing

• Provide first and second line support for the enterprise network, diagnosing and resolving incidents systematically.
• Install, configure, replace, maintain and troubleshoot routing, switching, authentication and related network technologies.
• Monitor network performance, spot emerging issues and take corrective or preventive action.
• Support Cisco Identity Services Engine administration for client provisioning, moves, additions and changes.
• Perform routine operational maintenance: configuration management, backups and system health verification.
• Support network infrastructure projects through equipment preparation, staging, testing, deployment, migration and acceptance.
• Assist with security assessments, infrastructure validation and implementing mandatory security controls.
• Maintain standard operating procedures, technical documentation and configuration records.
• Identify and recommend practical improvements to process, performance and infrastructure.
• Liaise with internal teams, service lines and external providers.

What we are looking for

• Solid enterprise routing and switching practice, and the diagnostic instinct that comes with it.
• Hands-on Cisco ISE administration, or the network authentication background to pick it up quickly.
• Experience of infrastructure project work end to end, from staging to acceptance.
• The discipline to keep SOPs and configuration records genuinely current.
• The ability to work with limited supervision while staying part of a technical team.

The role is full time on site in Brussels, Belgium, from early October to the end of December 2026.