Role: Voice Network Test Engineer

Location: Sydney, NSW

Employment Type: Permanent

Must Have:

Full working rights. No sponsorship available.

Role Summary:

As a Voice Tester, you will be responsible for validating, verifying, and ensuring the quality of voice services and network elements in Ribbon / ALU / Nokia voice environments. You will design and execute test cases, analyse defects, work closely with network engineers, and contribute to continuous improvement in voice service performance.

Key Responsibilities

• Develop, plan, and execute test cases for voice and fixed network elements, especially those involving Ribbon / ALU / Nokia voice switch platforms (such as SBCs, media gateways, etc.).
• Perform both functional and non-functional testing (e.g. load/stress, interoperability, voice quality) of voice services.
• Use voice protocols such as SIP, RTP, H.323, and others relevant in the Ribbon / Nokia portfolio.
• Configure and operate test tools, analyzers, probes, test harnesses. Monitor voice quality metrics (MOS, jitter, latency, packet loss).
• Validate new firmware/software releases and patches. Ensure backward compatibility and regression testing.
• Troubleshoot issues in lab/test environments; collaborate with development, network operations, and support teams to isolate and fix defects.
• Document test plans, test cases, and detailed defect reports. Maintain accurate records of testing results.
• Automate testing where feasible. Reuse scripts, build test suites.
• Maintain knowledge of standards and industry best practices in voice communication, telecom networks, and voice over IP (VoIP).

Qualifications & Experience

• Bachelor’s degree (or higher) in Electrical / Telecommunications / Computer Engineering, Computer Science, or related discipline.
• Experience with Ribbon / Sonus / ALU / Nokia voice platforms — SBCs, PABXs, media gateways
• Strong knowledge of voice protocols (SIP, RTP, codec behavior, etc.), voice signalling and transport.
• Hands-on experience with test equipment: signal/protocol analyzers, probes, test harnesses.
• Solid understanding of network fundamentals: LAN/WAN, QoS, jitter/latency, etc.
• Proven defect tracking, root-cause analysis and debugging skills.
• Experience with automation of test cases is a plus (e.g. scripting, test frameworks).
• Excellent communication skills—able to write clear test plans and reports, and work collaboratively with cross-functional teams.

Preferred Skills

• Experience in lab/test environment set-ups and hands-on lab debugging.
• Familiarity with voice quality metrics and emulation of network impairments (packet loss, latency, jitter etc.).
• Experience with Ribbon PSX, GSC, or equivalent in the Nokia/ALU portfolio.
• Knowledge of customer-facing deployments (field issues, troubleshooting live voice traffic).
• Exposure to continuous integration / test automation tools.

Interested consultants can share their updated resume at [email protected] or call +61 289 195 538.