VAS, Voice and Data Core Technical Specialist
Optus
Date: 7 hours ago
City: Sydney, New South Wales
Contract type: Full time
At Optus, we’re committed to delivering a reliable, high-performing network that keeps Australians connected. We don’t sit back and let the future happen to us - we’re out there making it. By expanding into new technology and relentlessly improving every day.
We believe in the strength of a vibrant, diverse and inclusive workforce where backgrounds, perspectives and life experiences of our people help us innovate and create strong connections with our customers.
In order to help us deliver exceptional network, The Technical Specialist, VAS, Voice and Data Core plays a crucial role in maintaining the stability and performance of our core network services by working within a dedicated Tier 2 Network Operations team. Based in our Network Operations Centre in Macquarie Park, this role supports 24x7 operations, coordinating service assurance activities such as incident response, change control, and problem management. Whether through hands-on technical execution or governance of our suppliers, you’ll be directly contributing to outstanding customer experience and network reliability.
A day in the life of a Technical Specialist is fast-paced and collaborative. You might kick off your shift analysing an incident, working side-by-side with our suppliers to isolate and resolve the root cause of a voice service disruption. Later, you’ll collaborate with network engineers on the seamless onboarding of a new solution or support a junior team member with troubleshooting advice. This role is ideal for someone who thrives in a high-accountability environment, has good communication skills, and takes pride in driving improvements across our Voice and Data Core platforms.
Location: 100% on site at Macquarie Park, Sydney
Application Closing Date: 13th July 2026
The day to day
Rapidly resolve complex network faults that impact customer experience, particularly those escalated beyond the Managed Service team.
Lead incident escalations, problem management, and root cause analysis to identify and eliminate recurring network issues.
Collaborate with vendors and suppliers on change management, planned works, and introduction of new technologies, ensuring alignment with Optus quality standards.
Provide expert input into service quality improvements, including design recommendations and network performance optimisation.
Monitor, analyse, and report on service KPIs and critical metrics, identifying and addressing performance gaps.
Represent Optus at Change Advisory Board meetings as a Subject Matter Expert, providing technical governance on significant network changes.
Support automation initiatives and tool enhancements, including alarm auditing, incident automation use cases, and continuous improvement of operational workflows.
Why you are our next Technical Specialist
Deep technical expertise in VAS such as Voicemail, SMSC as well as Mobile Packet and Voice Core technologies (4G and 5G), with deep knowledge of CCS7, diameter, HTTP/2, and SIGTRAN signalling standards.
Demonstrable experience in service operations within telecommunications, including hands-on network support and troubleshooting.
Demonstrated ability to manage technology vendors and successfully deliver complex projects on time and within budget.
Confident in communicating technical concepts, presenting recommendations, and responding effectively to management feedback.
Proactive problem-solver who takes ownership of issues, investigates root causes, and drives practical, timely solutions.
Recognised Subject Matter Expert with strong partner engagement skills and a collaborative, relationship-building approach.
What’s in it for you?
Supportive team and office environment, with 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, or paid secure parking facilities available!
Inclusive paid parental leave, up to 16 weeks for the primary care giver.
Competitive leave including 2 additional '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.
Keen to see what it’s really like to work at Optus? Search #OptusLife on LinkedIn to go behind the scenes!
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
[email protected]
or call 1800 309 170. 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 https://www.optus.com.au/about/inclusion-diversity.
#LI-DD1
We believe in the strength of a vibrant, diverse and inclusive workforce where backgrounds, perspectives and life experiences of our people help us innovate and create strong connections with our customers.
In order to help us deliver exceptional network, The Technical Specialist, VAS, Voice and Data Core plays a crucial role in maintaining the stability and performance of our core network services by working within a dedicated Tier 2 Network Operations team. Based in our Network Operations Centre in Macquarie Park, this role supports 24x7 operations, coordinating service assurance activities such as incident response, change control, and problem management. Whether through hands-on technical execution or governance of our suppliers, you’ll be directly contributing to outstanding customer experience and network reliability.
A day in the life of a Technical Specialist is fast-paced and collaborative. You might kick off your shift analysing an incident, working side-by-side with our suppliers to isolate and resolve the root cause of a voice service disruption. Later, you’ll collaborate with network engineers on the seamless onboarding of a new solution or support a junior team member with troubleshooting advice. This role is ideal for someone who thrives in a high-accountability environment, has good communication skills, and takes pride in driving improvements across our Voice and Data Core platforms.
Location: 100% on site at Macquarie Park, Sydney
Application Closing Date: 13th July 2026
The day to day
Rapidly resolve complex network faults that impact customer experience, particularly those escalated beyond the Managed Service team.
Lead incident escalations, problem management, and root cause analysis to identify and eliminate recurring network issues.
Collaborate with vendors and suppliers on change management, planned works, and introduction of new technologies, ensuring alignment with Optus quality standards.
Provide expert input into service quality improvements, including design recommendations and network performance optimisation.
Monitor, analyse, and report on service KPIs and critical metrics, identifying and addressing performance gaps.
Represent Optus at Change Advisory Board meetings as a Subject Matter Expert, providing technical governance on significant network changes.
Support automation initiatives and tool enhancements, including alarm auditing, incident automation use cases, and continuous improvement of operational workflows.
Why you are our next Technical Specialist
Deep technical expertise in VAS such as Voicemail, SMSC as well as Mobile Packet and Voice Core technologies (4G and 5G), with deep knowledge of CCS7, diameter, HTTP/2, and SIGTRAN signalling standards.
Demonstrable experience in service operations within telecommunications, including hands-on network support and troubleshooting.
Demonstrated ability to manage technology vendors and successfully deliver complex projects on time and within budget.
Confident in communicating technical concepts, presenting recommendations, and responding effectively to management feedback.
Proactive problem-solver who takes ownership of issues, investigates root causes, and drives practical, timely solutions.
Recognised Subject Matter Expert with strong partner engagement skills and a collaborative, relationship-building approach.
What’s in it for you?
Supportive team and office environment, with 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, or paid secure parking facilities available!
Inclusive paid parental leave, up to 16 weeks for the primary care giver.
Competitive leave including 2 additional '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.
Keen to see what it’s really like to work at Optus? Search #OptusLife on LinkedIn to go behind the scenes!
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
[email protected]
or call 1800 309 170. 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 https://www.optus.com.au/about/inclusion-diversity.
#LI-DD1
See more jobs in Sydney, New South Wales