Lead Technical Specialist

Date: 3 Nov 2025

Location: Sydney, Australia

Company: Singtel Group

Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions.

We are now seeking a skilled Lead Technical Specialist to join The Mobile Enablement & Messaging team. The team is responsible for crafting mobile solutions such as messaging, scam control, eSIM, roaming, and location services to support Optus business units.

The day to day

As a Lead Technical Specialist, your primary duties will involve:

• Performing life cycle management, capacity management, platform architecture and evolution, and capital management associated with the platform including tendering and benchmarking.

• Developing and maintaining platform roadmaps, architecture, and evolution plans years).

• Acting as a Subject Matter Expert for the relevant technology area.

• Assessing existing network elements and implementing updates to build all network components to meet Optus' network composition standards.
• Specifying, defining, and documenting procedures, standards, and protocols to ensure engineering guidelines.
• Proactively liaising with internal groups and business units to drive and resolve network and/or process-related issues.
• Liaising with vendors for commercial and technical matters.
• Managing the preparation, execution, and reporting of the AOP planned activities and budget requirements. Preparing capital submissions to support planned network activities.

Why you should be our next Lead Technical Specialist

To excel in this role, you will need:

• Strong telco background with experience in managing and delivering solutions in the areas of messaging and scam messaging control and management that support regulatory and operational needs

• A technical qualification (degree) in Telecommunications Engineering (or related Engineering field) or equivalent (desirable)

• Highly experienced in mobile telecommunications, encompassing 4G and 5G Core technologies.
• Proficient understanding of fundamental mobile technologies.
• Strong knowledge of 3GPP standards for 4G and 5G, along with expertise in Network Function Virtualisation, Orchestration and Automation, and/or cloud deployment technologies.
• Experience with delivery and management of core network applications as VNFs and CNFs within a virtual network environment.
• Project and program management knowledge; leading small dedicated or virtual teams would be beneficial.
• Experience in dealing with a variety of vendors on commercial and contractual matters, non-delivery, new pricing proposals, and SOW.
• Strong communication skills with the ability to communicate at middle and senior management levels.
• Good experience in vendor management.

What's in it for you?

• Competitive remuneration and employee discounts. Make life easier (and more affordable) with $80 monthly credit and 25% off Optus products and unique shopping discounts with our retail partners.

• Flexible working arrangements with opportunities to work three days in the office, two days remote or home.

• Vibrant and collaborative office campus that includes cafes, convenience store, chill out zones, GP, post office, gym and on-site childcare centre.

• Competitive leave policies, including additional 'Connected' days to focus on culture, family, health, community, or whatever's important to you.

• We support growing families with inclusive, carer-neutral paid Parental Leave of up to 16 weeks.

• Direct your own development and build future-ready skills with Optus U's industry-focused micro-credentials, developed with La Trobe and Macquarie Universities.

• Build meaningful connections through employee-led networks and diversity initiatives including Culture Connect, Elevate Women, Disability Network and Express Yourself (LGBTQIA+).

• Put your wellbeing first with free access to counselling and support services, 24/7 — in-person, by phone, SMS, or video.
• Free Optus bus from Macquarie University Metro Station (every 6-8 minutes); morning and afternoon.

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