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NTT DATA Logo NTT DATA · IT - Administration

MS VoIP Engineer

South Africa, Johannesburg · Job Posted March 19, 2026
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Job Description

The MS VoIP Engineer is responsible for providing a service to clients by proactively identifying and resolving technical incidents and problems. Through pre-emptive service incident and resolution activities, as well as product reviews, operational improvements, operational practices, and quality assurance this role will maintain a high level of service to clients. Their primary objective is to ensure zero missed service level agreement (SLA) conditions. The MS VoIP Engineer is responsible for managing tickets of low to high complexity.

Job Responsibility

  • Ensure that assigned infrastructure at the client site is configured, installed, tested, and operational
  • Perform necessary checks, apply monitoring tools and respond to alerts Identify problems and errors prior to or when it occurs and log all such incidents in a timely manner with the required level of detail
  • Assist in analysing, assigning, and escalating support calls
  • Investigate third line support calls assigned and identify the root cause of incidents and problems
  • Report and escalate issues to 3rd party vendors if necessary
  • Provide onsite technical support to clients and provide field engineering services to clients
  • Conduct a monthly random review of incidents and service requests, analyse and recommend improvement in quality
  • Provide continuous feedback to clients and affected parties and update all systems and/or portals as prescribed by NTT
  • Proactively identify opportunities for work optimization including opportunities for automation of work

Requirements

  • Bachelor's degree or equivalent in Telecommunications or Information Technology, or related field
  • 3 - 5 years ICT experience or worked experience in a similar role
  • CCNA/ CCNP certification
  • Cisco Certified Network Associate (CCNA) Voice/Collaboration – Advantageous
  • Strong understanding of VoIP protocols systems (SIP, RTP, H.323), networking fundamentals (TCP/IP, LAN/WAN, VLANs), and voice codecs
  • Network QoS
  • Good understanding of WAN/LAN systems
  • ITIL v4
  • IT and technical support experience
  • Excellent communication and negotiation abilities

Nice to have

Cisco Certified Network Associate (CCNA) Voice/Collaboration – Advantageous

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