Mobile Voice Platform Technical Specialist

We don't sit back and wait for the future to happen, we are out there crafting our own path through new technology, innovation, and investment. We are truly a challenger brand, with challenger spirit.

We are seeking a Technical Specialist to join our Mobile Voice Platform Engineering team, responsible for the planning, design, growth, and performance of Optus' 4G and 5G mobile voice switching platforms.

This role will lead the end-to-end management of platforms, including lifecycle and capacity management, roadmaps, vendor governance, procurement, budgeting, and high-level design through to deployment. Acting as a technical lead, you will drive the delivery of projects in collaboration with stakeholders across the mobile engineering domain.

With strong expertise in mobile voice services, virtualised and cloud-native functions, and cloud environments (including both private and public cloud deployments), you will provide both strategic direction and hands-on technical management across IMS, signalling core, voicemail, and related platforms. Strong financial and influencing skills are crucial, as this senior role combines technical leadership with financial and business accountability.

Ready to reimagine your career at Optus?

Lead technical strategy and planning through developing and maintaining roadmaps, architecture, standards, and evolution plans for mobile voice core platforms.

Manage budgets and programs to prepare and deliver AOP activities, capital submissions, cost reviews, and procurement (RFP/RFI, tenders, purchase orders).

Oversee platform lifecycle and capacity in order to ensure platforms meet design standards, capacity forecasts, performance thresholds, and customer experience KPIs.

Drive delivery and implementation through managing high-level design, deployment, equipment installations, and workflow improvements to ensure quality and efficiency.

Engage business partners and vendors and act as the prime technical interface for upgrades, new technology introduction, product assessments, governance meetings, and contract negotiations.

Ensure compliance and governance by maintaining WHS standards, inventory matrix, vendor governance, and end-of-life/obsolescence management across platforms.

It starts with you

Relevant professional qualifications in Telecommunications Engineering or related field, together with equivalent technical qualification.

Proven hands-on experience in mobile telecommunications across 4G and 5G, with extensive platform knowledge (IMS Core, Voicemail, Core Signalling, Application Servers, etc.).

Proven experience in mobile core platform design, roadmap development, lifecycle management, capacity planning, and deployment of VNFs/CNFs in virtual/cloud environments.

Strong background in supplier engagement, tenders, proposals, pricing negotiations, and statement of work preparation.

Excellent communication and engagement skills up to executive level, with the ability to lead teams, think strategically, and drive business outcomes.

Solid understanding of ROI, NPV, P&L, risk management, and conceptual/analytical thinking to balance technical and commercial priorities.

The good stuff …

3 days in the office, 2 days remote – with flexible hours to suit

Inclusive carer neutral paid Parental Leave of up to 16 weeks

Competitive leave including 2 'Connected Leave' days

All Optus employees have access to resources, webinars and support via the 'Parents at Work portal'

Own your own growth by accessing an extensive online and facilitator led learning catalogue.

Connect at work through our employee-led volunteer groups: Culture Connect, Elevate Women, Disability Network, Express Yourself (LGBTQIA+), United Veterans, Yarn Network, Wellbeing Network and Young Professionals.

Vibrant campus life, variety of facilities including restaurants, cafes, gymnasium, GP, and post office

Free Optus bus from Macquarie University Metro Station (every 6-8 minutes); morning and afternoon

Curious about our culture? Go behind the scenes with our people by searching #OptusLife on LinkedIn.

At Optus, we are strengthened by others and that means valuing diversity and saying 'yes' to embracing individual differences. We are committed to ensuring that our application process provides an equal employment opportunity to all job seekers, including individuals from diverse gender, cultural and linguistic backgrounds, individuals with a disability, individuals identifying as being part of the LGBTQIA+ community, individuals who may have served in the armed forces or who identify as Aboriginal and/or Torres Strait Islander. We also want to do our best to make our recruitment process inclusive. If you require any adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email

or call We're here to help. When you contact us, please advise your preferred method of contact and we will be in touch within 48 hours.

For more information on Diversity, Inclusion & Belonging at Optus, please visit