Network and telephony administrator

Role: Network and telephony administrator

Location: Brussels, Belgium

Duration: 2 Months (The first mission will take place from 18/05/2026 until 31/08/2026 and may be renewed quarterly during the year 2026)

Language: English , French / Dutch

Description

• We are looking for a network administrator with knowledge of telephony and contact center or willing to acquire it to strengthen the network and telephony team.

• The network and telephony team is responsible for setting up, managing, supporting and improving Clients network and telephony infrastructure.

Specifically, you may be responsible for the following tasks:

• Network monitoring, management and tracking
• Replacement, addition, monitoring, maintenance of network infrastructure components (switches, routers, proxy appliances, Wi-Fi appliances, firewalls, etc.)
• Management, implementation and maintenance of network security equipment (Firewall, Web application firewall, email secure gateway, etc.)
• Establishing network links between the different sites
• Installation and configuration of network equipment according to the plans provided by the network architecture team
• Management, implementation and maintenance of network monitoring tools for capacity management and traffic evolution on the network
• Support for the various ICT teams in the context of incident management (level 2 and 3 support)
• Suggestions for improvements to network architecture and security.
• Daily management of IP telephony
• Participation in the deployment of new contact centers to improve service operations
• Occasionally and on a one-off basis, participation in small network cabling projects
• Furthermore, in order to participate in task automation, you have a good understanding of automation principles, infrastructure provisioning tools, and scripting and automation languages.

The technical skills sought are

• Ethernet, TCP/IP
• Wifi: Cisco 5500 and C9800 controllers,
• Managing Nexus 9000 series routers
• Switches C9200, etc
• Fortigate 70F and 600E firewalls. Architecture management with multiple virtual domains.
• Security rules in a Windows environment
• DNS, VLAN, Proxy, VPN SSL, Cisco UCCM et UCCX, WLC, NAC, HSRP, LACP
• Small network cabling
• Knowledge of IP telephony and CISCO contact center is a plus.

It is imperative to have a good understanding of the network architecture as a whole, and to be proactive in suggesting ways to improve its reliability and resilience.

As the team is French-speaking, it is required that the consultant be able to understand and express themselves in French.

The first mission will take place from 18/05/2026 until 31/08/2026 and may be renewed quarterly during the year 2026.

Skills

• Cisco
• DNS
• Fortigate
• Microsoft Windows
• Security Expertise
• TCP/IP
• VPN