IT
Voice Engineer
Hire Resolve
Johannesburg, Gauteng
Permanent
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Posted 14 October 2025

Job Details

Job Description

A prominent Telecommunications Provider based in Johannesburg, South Africa, specializing in providing services primarily to businesses (B2B), is seeking a highly skilled individual with end-to-end VoIP expertise and a strong networking background. This role is critical for managing technical escalations, troubleshooting complex voice issues, and ensuring timely resolution for clients, wholesalers, and partners.

Responsibilities:

  • Serve as the primary point for technical escalations from service teams, clients, and partners (wholesalers, interconnects).

  • Use diagnostic tools (e.g., Wireshark, SIP traces, syslog analysis) to identify, investigate, and implement solutions for common and complex voice failures.

  • Manage the full incident lifecycle, including ensuring a ticket is logged and providing timely feedback to customers/wholesalers.

  • Engage with upstream service providers to resolve complex issues affecting service delivery.

  • Provide specific technical support to internal field technicians for voice-related problems.

  • Systematically escalate more complex issues to senior expertise when required.

  • Apply a strong diagnostic mindset and pattern recognition to isolate issues across network layers.

  • Assist with departmental special projects and ad-hoc requests delegated by the Networks Manager.

  • Contribute to service improvement through proactive monitoring and incident prevention efforts.

  • Provide mentorship and training to new agents or interns as required.



Minimum Requirements: 
  • End-to-end VoIP Expertise (signaling to termination).
  • Strong Networking Background (routing, switching, and protocols).
  • Experience with at least one VoIP Monitoring Tool (e.g., VoIPMon, OCOM, HOMER).
  • Foundational understanding of Session Border Controllers (SBCs), ideally ACME Packet.

  • Clear Communication: Ability to simplify complex technical information for non-technical audiences.

  • Self-Management: Must work independently with minimal supervision.

  • Own reliable transport is essential.

  • VoIP Technologies: 📞 SIP, RTP, Codecs, NAT traversal.

  • Softswitch Experience: PortaOne, Bicom, or similar platforms.

  • Troubleshooting Tools: Wireshark, SIP traces, syslog analysis.

  • Networking Fundamentals: TCP/IP, DNS, DHCP, Firewalls, VLANs, QoS.

  • Hardware Knowledge: Mikrotiks and Cisco Technologies.

  • SIP Advanced: Advanced Understanding of SIP Trunking (IP Auth and Digest).

  • Provider Experience: Working with upstream providers/telcos and tunnelling methods.

  • Basic Knowledge: SQL and Linux Experience.



Benefits:

  • Competitive salary based on experience (salary can potentially be more based on experience/skills)

IF you meet the above requirements and want to make a career-changing move, apply today by emailing your CV to [email protected] or [email protected] .

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