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Proximus SpearIT - Unified Communication Architect


  • Maintain complex and challenging infrastructures in Unified Communication (Design)
  • Setup and test in lab new technologies
  • Prepare and execute Test plan
  • Contribute to the delivery of projects (Transition)
  • Propose and contribute to technical improvement plans
  • Ensure compliance (in operations and projects)
  • Troubleshoot complex incidents
  • Insure client satisfaction
  • Interact and co-operate with vendors
  • Contribute actively to Teams synergy



  • Education : BAC +5 in computer sciences or equivalent
  • 5+ years of VoIP experience, preferably in a large enterprise environment
  • Have a deep knowledge of, and solid experience with deploying and configuring unified communications, such as:
    • Cisco Unified Communications Manager experience required
    • IP telephony & Video conference
    • Collaboration tools such as Skype for Business/Lync, Cisco Webex & Cisco IM & Presence / Cisco Jabber
    • Integration with classic telephony during a migration phase (Siemens)
    • Integration with Active Directory/ LDAP
    • External gateways (Session Border Controller and Public gateways)
    • Internet Protocol: IP, TCP, UDP, SIP, H323, DNS, HTTP, SSL, IPsec,
  • Have been working with infrastructure areas like;
    • Cisco networking equipment, including WLAN.
    • Firewalls (preferably CheckPoint/Fortinet).
  • Cloud-based infrastructure.
  • Automation and Infrastructure as Code: Bash/Perl/Python Scripting, Ansible
  • Fluent in English is a requirement, French is an advantage
  • Any UC Certification is considered as an advantage
  • Experience in delivering in a production environment is considered as an advantage

Location and Timing issues

  • Provision of the above mentioned services basically in Luxembourg, with a possibility to work in Brussels about 2-4 days per month.
  • Occasional interventions outside of normal working hours may be requested

Description société

About Proximus SpearIT
At Proximus SpearIT we strive to help companies work smarter, safer and faster. Customers come to us for our wide and extensive offering of IT services. Due to our strong growth, we are always looking for new employees. We have a challenging strategic plan in which you, as an experienced IT professional certainly have a role to play.
Proximus SpearIT is strong in:
- infrastructure projects and integrations, on-site and in the cloud;
- services related to networks, security, Skype for Business, storage, network and server maintenance, monitoring, service desk, and on-site support;
- support by IT specialists, project managers and interim managers;
- servers, network equipment, smartphones, tablets, PCs and accessories.

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