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.
The Skills You Bring:
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
Job details: Support Engineer
Job Stage: Job Stage 6
Primary Recruiter: Carolyn Larsen
Hiring Manager: Pankaj Kumar Dwivedi
Skills Required
- Experience with 5G Core and Cloud Core environments
- Strong understanding of IMS architecture and call flows (CSCF, BGCF, MGCF, SBC, TAS/MMTel, HSS/UDM, PCRF/PCF, AS)
- Knowledge of VoLTE, VoWiFi and VoBB including registration, call flows, SMS over IMS, emergency calls, interconnect and roaming
- SIP and SDP expertise (methods, dialogs, routing, forking, re-INVITE, UPDATE)
- Diameter knowledge across Cx, Sh, Ro, Rx and Gy/Gx interfaces; Radius exposure
- Solid IP networking skills: IPv4/IPv6, routing, VLANs, DNS/ENUM, NAT, firewalls, load balancers, QoS
- Understanding of TLS/IPSec, certificates and signaling/media security concepts
- Linux administration skills including systemd, networking, storage and performance basics
- Experience with virtualization and cloud/NFVI: VMs, OpenStack, VMware, containers and Kubernetes
- Proven L2/L3 incident management, advanced troubleshooting and root-cause analysis
- Ability to communicate clearly with customers and stakeholders during critical incidents
- Drive operational efficiencies through automation, knowledge sharing and mentoring
- Ability to independently manage support cases and resolve critical issues without escalation where possible
What the Team is Saying
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Ericsson Compensation & Benefits Highlights
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Healthcare Strength — Healthcare coverage includes employer‑verified medical, dental, and vision plans, along with HSAs/FSAs and EAP/mental‑health support. Wellbeing initiatives are highlighted as part of Life at Ericsson.
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Retirement Support — Retirement programs include a 401(k) with company matching that is employer‑verified, with mentions of match levels varying by time and team and pension support in some regions. This is frequently cited as a solid pillar of the package.
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Parental & Family Support — Paid parental leave is described as competitive in many U.S. postings, with examples up to 16 weeks maternity and 6 weeks parental/adoption at 100% pay. Family‑friendly policies and return‑to‑work support are also called out.
Ericsson Insights
What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks, platforms, and systems that billions of people, businesses, and societies depend on every day. We are a global leader in communications technology, delivering mobile network infrastructure, cloud software, and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries, helping power everyday communication as well as critical digital services at global scale. Connectivity has evolved far beyond consumer mobile use. Today, nearly 80% of the world’s population accesses the internet via mobile networks, and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced, developing network APIs that open connectivity to the global developer ecosystem, and applying automation and AI to make networks more intelligent, efficient, and resilient. Ericsson was the first company to launch live 5G networks on five continents, and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36,000 enterprise customers, enabling secure, high-performance connectivity for industries such as manufacturing, aviation, logistics, utilities, and public safety, where reliability and performance are mission critical. Innovation is central to how we work. Ericsson has approximately 28,000 employees in research and development, backed by one of the strongest intellectual property portfolios in the industry with 60,000+ granted patents. Our engineers, researchers, and technologists work across 100+ global R&D sites, helping define how networks evolve and how digital infrastructure is built for the long term. As the world moves toward a mobile-first, AI-powered, and cloud-driven future, connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation, shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact, today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day, tackle complex challenges in live environments, and keep developing your skills and career in your own vision.
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