Job Description

3rd Line Support Engineer
2025-07-21 - 2025-08-20
Permanent
JHB001127
Telecommunications
Gauteng, Johannesburg
R 40 000 - R 53 000 Monthly Cost To Company
Technical L3 Support Engineer - Voice & Unified Communications
Location: Johannesburg based (Work from home)
Industry: Global Telecoms Solutions & Services
Work Type: Full Remote | Must have a reliable WFH setup
Join a leading global telecoms company that's redefining the digital communications space. As an L3 Support Engineer, you'll be the go-to expert for complex VoIP, SIP, and Unified Communications challenges. Working closely with global delivery and engineering teams, you'll enjoy world-class mentorship, and collaborate across borders -- all from the comfort of your home.
As a Senior L3 Support Engineer, you will play a critical role in troubleshooting complex telephony, network, and communication issues, ensuring seamless collaboration and customer engagement for businesses. You will work with SIP-based VoIP technologies, Microsoft Teams Calling, SD-WAN architectures, and contact centre platforms, while collaborating with cross-functional teams to optimize security, performance, and user experience.
Experience/qualifications required:

• Diploma/ Similar
• CCNA (would be advantageous
• SIP School Certs - advantageous
• 4+ years in VoIP, SIP, SBCs, involving networking and advanced SIP trunk signalling, RTP media flow
• SDWAN experience would be ideal
• Strong hands-on experience with SBCs (AudioCodes, Ribbon, Oracle, etc.) and Microsoft Teams Direct Routing
• Experience working with Contact Centre solutions would be ideal
• Strong knowledge of VoIP security best practices, firewall configurations, VPNs, and QoS policies.
• Ability to work under pressure with strong trouble shooting skills using a high degree of accuracy
• Exposure to Azure networking, virtualized voice infrastructure, and hybrid UC environments would be ideal
• Strong command of tools like Wireshark, SIP logs, syslog, CLI.
• Excellent English communication and documentation skill

• Collaborative, global team culture with engaging peer support across time zones.
• Remote-first environment with Johannesburg roots - flexibility with structure.
• Ongoing training and development with highly talented leadership that loves to share knowledge.
• A chance to work on cutting-edge telecom platforms that impact global users.