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Senior Voice Engineer (Service Provider - Carrier)

Private Company - Moruya, NSW

Source: uWorkin


Southern Phone manage our own MPLS network, our own cloud infrastructure and our own management systems. We are looking for an experienced Carrier IP Voice Engineer to join our Team.

Looking for a Sea Change to coastal Moruya (NSW). 

Core responsibilities for this role include:

  • Voice infrastructure design and architecture nationally
  • Vendor and growth management
  • Ensuring 99.999% system, platform, and application uptime and quality
  • Ensuring average MOS grade > 3.9 at all times
  • Acting as the point of contact for core voice infrastructure related issues
  • Managing escalated voice infrastructure related tickets from the service desk
  • Reducing voice infrastructure related incidents via strong problem management capabilities (i.e. root cause analysis, trends analysis etc.)
  • Assist the Service Desk in general IT support for clients

The ideal candidate is an experienced Voice and SIP generalist, with a background working with a Carrier and/or Managed Services Provider. Must have demonstrated experience troubleshooting and resolving complex technical issues to a critical timeline.

Essential skills, experience and qualifications include:

  • Minimum 8+ years’ experience with the SIP VoIP protocol, including full call signalling codes and processes debugging
  • Expert use and management of Class 4 and Class 5 voice switches
  • Expert understanding of SIP mean opinion score optimisation and grading
  • Expert understanding of Quality of Service in a SIP solution including Jitter, Latency, PDV
  • Expert understanding of VoIP codecs and transcoding processes
  • Expert understanding of SIP packets, especially SDP payloads, including the ability to reconstruct a SIP call flow and follow the ladder
  • Expert understanding of SIP registration process including Options packets and timers
  • Expert understanding on toll fraud prevention techniques
  • Expert understanding of analog and legacy telephone adaptors (ATA)
  • Expert understanding of IP handsets including automated provisioning
  • Expert understanding of using Wireshark to open PCAP traces and reconstruct calls
  • Expert understanding of WebRTC standard and technology
  • Experience in Cisco Unified Call Manager version 10+ (CUCM)
  • Experience in Cisco Unified Call Manager Express on ISR (CUCM-E)
  • Experience in Cisco Survivable Remote Site Telephony (SRST)
  • Experience in Cisco Unified Contact Centre Express version 10+ (UCCX)
  • Knowledge and practical experience with SIP SRV for high availability
  • Demonstrated experience in running meshed SIP Active-Active clustering for HA and load
  • Troubleshooting voice related issues within a service provider environment
  • Experience working with mission critical networks, platforms, and applications
  • Excellent verbal communication skills over the phone and customer service attitude.
  • Certified Cisco CCIE Collaboration v2
  • Certified VMWare Professional or demonstrated virtualisation experience

Any experience or qualifications in the following will also be highly regarded:

  • ITILv3 certification
  • Experience with VoipMonitor software suite
  • Experience with VoipSwitch software suite
  • Experience with hosted PBX solutions