Senior 5G Core & Voice Network Specialist

Optus; Sydney; On-site; AUD 170,000 - 210,000; Full time

Benefits offered by this job

Competitive remuneration

Monthly $80 credit

25% off Optus products

On-site campus facilities

Extended leave / Connected days

Parental leave up to 16 weeks

Job summary

Optus is seeking a Voice and Data Core Senior Technical Specialist to ensure performance, availability, and reliability of critical network services within the Tier 2 Network Operations team. The role provides 24/7 operational support across Voice and Data Core platforms, coordinating incidents, problems, and changes with vendors and engineering.

The position also provides technical leadership, mentors team members, and contributes to new network capabilities while driving operational excellence

Qualifications

• Experience with mobile core networks (4G/5G) and CCS7, Diameter, HTTP/2, SIGTRAN signalling.
• Hands-on network operations, incident handling, and problem management in telecom environments.
• Ability to manage vendors and govern multiple stakeholders.

Responsibilities

• Diagnose and resolve faults impacting Packet Core, IMS, Subscriber Data Management and 5G Core services.
• Lead major incident escalations, coordinate cross-functional teams to restore services.
• Perform root cause investigations and drive permanent corrective actions.
• Maintain performance across EPC, 5G Standalone Core, IMS and Subscriber Data Management.

Skills

Packet Core tech

5G Core tech

Signalling protocols

Incident management

Vendor governance

Technical leadership

Tools

Ericsson Nodes (EPG, MME, WMG, PCC, PCG, CCDM, CCSM, SBG, MTAS, CSCF, HSS, HLR)

Job description

Optus is seeking a Voice and Data Core Senior Technical Specialist to ensure performance, availability, and reliability of critical network services within the Tier 2 Network Operations team. The role provides 24/7 operational support across Voice and Data Core platforms, coordinating incidents, problems, and changes with vendors and engineering.

The position also provides technical leadership, mentors team members, and contributes to new network capabilities while driving operational excellence