C003531 CSU Brussels Network Voice Specialist (NS) - WED 1 Oct RELAUNCH

Please note that submitted candidates were considered not compliant due to the following:

• The candidate does not meet the "essential" requirements specified in the SoW. The candidate has no experience at all with Voice nor Skype for Business (Unified Communications systems such as Microsoft Lync or Microsoft SFB; Experience with Voice SBC systems) which are the absolute minimum requirements for this position;
• This candidate doesn't have any SFB knowledge nor experience and has therefore not been interviewed.
• Although this candidate is a server support engineer, we've interviewed this person but very quickly turned out not to have any relevant SFB voice experience.

Deadline Date: Wednesday 1 October 2025

Requirement: Network Voice Specialist

Location: Brussels, BE

Full Time On-Site: Yes

Time On-Site: 100%

Total Scope of the request (hours): 487

Required Start Date: 3 November 2025

End Contract Date: 31 December 2025

Required Security Clearance: NATO SECRET

Duties and Role

Under the direction of Head, Network Management, but largely on own initiative, the incumbent will perform the following duties:

• Provides first and second line voice support to the Service Centre;
• Performs diagnoses and resolve voice incidents and problems;
• Monitors voice systems and proactively reports and resolves potential voice issues;
• Performs software patching of Skype For Business (SFB) and Session Border Controller systems (SBC);
• Works outside office hours or on weekends as required;
• Seeks recommendations from his/ her superiors for technical solutions;
• Maintains liaison with other CSU internal units, Service Lines and other technical organizations;
• Creates and maintains Standard Operating Procedures and documentation of the supported Unified Communications systems;
• Assists with and implements assigned project work packages;
• Works with limited supervision;
• Coordinates and conducts own work to meet quality targets;
• Performs other duties as may be required

• NATO Secret security clearance
• Higher vocational training in a relevant discipline with 2 years post-related experience or a secondary educational qualification with 4 years post-related experience;
• At least 3 year experience in a similar position;
• At least 3 year experience with operation, deployment and configuration of Unified Communications systems such as Microsoft Lync or Microsoft SFB;
• Experience with Voice SBC systems;
• A good knowledge of protocols and standards utilized in VoIP and SFB; SIP, TLS, MGCP, H.323, RTP (incl. G.711, G.729 codecs), and other similar standards;
• Experience in utilizing SFB and SBC toolkits for troubleshooting purposes;
• Experience with device monitoring tools such as Microsoft SCOM, ZABBIX and provide reporting and identifying devices that aren't functioning properly;
• Experience with O&M of PABX systems;
• Experience with Polycom provisioning systems and Polycom phones;
• Experience with Microsoft PowerShell.

Desirable:

• Knowledge and experience with Alcatel PABX systems
• Knowledge and experience with AudioCodes SBCs;
• Experience with Active Directory, GPOs and PKI certificates;
• ITIL certificate;
• Prior experience of working in an international environment comprising both military and civilian elements;
• Knowledge of NATO responsibilities and organization