We're looking for a
Senior Technical Specialist – Voice Core IME
to join our Integration & Maintenance Engineering team in
Sydney,
where you'll provide deep technical leadership across our Fixed Voice Core platforms and support critical customer services, including Services Australia.
Your day in the life of a Senior Technical Specialist at Optus
Acting as the Subject Matter Expert for Fixed Voice Core, including fixed voice access and interconnect services
Providing Tier 3 technical support, fault analysis, troubleshooting and restoration across complex voice platforms
Owning service and platform performance, including proactive monitoring, optimisation and remediation
Leading software and hardware upgrades, testing, and production network cutovers with minimal customer impact
Supporting new product testing and integration, including vendor management and defect resolution
Analysing network performance metrics, defining KPIs and delivering optimisation recommendations
Developing and maintaining high‐quality engineering design, testing and operational documentation
Providing technical leadership, coaching and mentoring to engineers and operational teams
Participating in on‐call, after‐hours and weekend support as required
What You Bring
Australian Citizenship – essential for security clearance purposes.
A degree in Telecommunications Engineering, IT, Computer Science, or a related discipline
Extensive experience in telecommunications, with strong exposure to Fixed Voice and IP‐based networks
In‐depth experience with Fixed Voice Core platforms and SIP signalling, tracing and performance analysis
Experience working in large‐scale network environments and telecommunications operations




Strong fault management experience, including complex and long‐duration incidents
A solid background in testing, proof of concept and platform integration
The ability to communicate complex technical concepts clearly to senior stakeholders, including VP level
Strong analytical, problem‐solving and decision‐making skills
Perks we love at Optus
Competitive salary and performance incentives
Discounts to Optus products and services, plus access to over 400 retail discounts Australia‐wide
Up to five days of Volunteer Leave each year
A paid "Connected" day to spend time on what matters most to you
Inclusive, carer‐neutral paid parental leave
Ongoing learning, development and career growth through OptusU
Versatile and hybrid ways of working (role dependent)
Employee wellbeing support, including free, confidential counselling services
Access to employee‐led networks and communities, including Culture Connect, Elevate Women, Disability Network and LGBTQIA+ initiatives
Diversity, Inclusion & Belonging at Optus
At Optus, we are strengthened by others and that means valuing diversity and saying 'yes' to embracing individual differences. We're committed to providing an equal employment opportunity to all job seekers, including people from diverse gender, cultural and linguistic backgrounds, people with disability, those identifying as LGBTQIA+, Aboriginal and/or Torres Strait Islander peoples, veterans and carers.
If you require any adjustments or accessibility support to participate fairly in the recruitment process, please contact
or call
.
To learn more about Diversity, Inclusion & Belonging at Optus, visit: about/inclusion-diversity
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📌 Senior Technical Specialist Voice Core (New South Wales)
🏢 Optus
📍 New South Wales