About this opportunity:
At Ericsson, we are seeking a knowledgeable and dedicated Support Engineer to join a small IMS support team within MOAI NEO, focused on 5G Core and Cloud Core for NACI customers. In this pivotal role, you will own complex L2/L3 incidents, improve live network stability, and work closely with product, project and problem management teams to reduce outages, prevent repeat faults and introduce new CCxx releases safely. You will play a key role in delivering reliable, high-performing 5G Cloud Core solutions, ensuring customer satisfaction, operational excellence and ongoing service stability.
What you will do:
- Lead investigations and drive the resolution of complex L2/L3 incidents across IMS, 5G Core and Cloud Core environments.
- Restore customer networks and services during critical incidents, taking ownership of fault isolation, advanced troubleshooting and service recovery.
- Analyse system behaviour, identify root causes and work with problem management to prevent repeat faults and improve live network stability.
- Collaborate with product, project and delivery teams to support safe introduction of new CCxx releases and operational changes.
- Communicate clearly with customers and internal stakeholders during high-pressure incidents, providing timely updates and practical technical guidance.
- Drive operational efficiencies through automation, knowledge sharing, mentoring and continuous improvement.
- Independently manage support cases, resolve critical issues without escalation where possible, and contribute to reduced turnaround times.
Core IMS / VoLTE / VoWiFi domain:
- Strong understanding of IMS architecture and call flows, including CSCF, BGCF, MGCF, SBC, TAS/MMTel, HSS/UDM, PCRF/PCF, AS and related functions.
- Knowledge of VoLTE, VoWiFi and VoBB, including registration, call flows, supplementary services, SMS over IMS, emergency calls, interconnect and roaming.
- Familiarity with vendor IMS implementations and deployment topologies.
Protocols and networking:
- SIP and SDP expertise, including methods, dialogs, routing, forking, error codes, re-INVITE and UPDATE.
- Diameter knowledge across Cx, Sh, Ro, Rx and Gy/Gx interfaces, with Radius exposure where relevant.
- Solid IP networking skills, including IPv4/IPv6, routing, VLANs, DNS/ENUM, NAT, firewalls, load balancers and QoS.
- Understanding of TLS/IPSec, certificates and security concepts for signaling and media.
Platforms, OS and tooling:
- Linux administration skills, including systemd, networking, storage and performance basics.
- Experience with virtualization and cloud/NFVI, including VMs, OpenStack, VMware and containers/Kubernetes for cloud-native IMS.
What happens once you apply?Click Here to find all you need to know about what our typical hiring process looks like.We encourage you to consider applying to jobs where you might not meet all the criteria. We recognize that we all have transferrable skills, and we can support you with the skills that you need to develop.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more.
Primary country and city: Australia (AU) || Sydney
Support Engineer
Job Stage: Job Stage 6
Primary Recruiter: Carolyn Larsen
Hiring Manager: Pankaj Kumar Dwivedi
The future of mobile isn’t on the horizon, it’s happening now. At Ericsson, we’re building the foundation for an open network ecosystem where industries, developers, and enterprises thrive.
The convergence of 5G, AI, cloud, and network APIs isn’t just a technological shift; it’s a transformation that is redefining industries and enhancing everyday life. Open, programmable networks are enabling real-time innovation and unlocking new business models across the globe.
Imagine a world where developers can dynamically access network capabilities on demand, where enterprises don’t just use connectivity but shape it. This isn’t a distant vision, it’s the ecosystem we’re creating today.
Collaboration fuels everything we do. By working across industries, we’re designing a future where connectivity isn’t just seamless. It’s intelligent, programmable, and transformative.
The shift is happening. Are you part of it?
