About this opportunity:
At Ericsson, we are seeking an experienced Support Engineer to join a small CCxx/UDM support team within MOAI NEO, focused on 5G Core and Cloud Core solutions for NACI customers. In this pivotal role, you will support 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. This role directly contributes to Ericsson's mission of delivering reliable, high-performing 5G Cloud Core solutions through strong technical ownership, customer focus and operational excellence.
What you will do:- Lead L2/L3 investigations and drive resolution of complex customer issues across 5G UDM and CCxx Cloud Core applications, including CCSM, CCDM and CCRC.- Own critical incident response, fault isolation and service restoration activities in carrier-grade, customer-facing environments.- Analyse system behaviour, logs, network flows and distributed platform performance to identify root causes and prevent repeat faults.- Partner with product, projects, service delivery and problem management teams to improve service stability and safely introduce new CCxx releases.- Communicate confidently with customers and internal stakeholders, providing clear updates, technical guidance and resolution plans during high-priority incidents.- Drive operational efficiencies through automation, knowledge sharing, documentation, mentoring and continuous improvement initiatives.
The skills you bring:- Solution & data model: Clear understanding of the overall UDC/UDM solution, including how CUDB/UDR, HLR-FE, HSS-FE, EIR-FE, CCRC, CCSM and CCDM fit together; subscriber data models in CUDB, including keys, indexes and replication; and how subscription changes flow from CCDM to FEs and onwards to EPC/IMS and PACO.- Key protocols & interfaces: Strong Diameter skills, including S6a/S6d, Cx, Sh, Gr, SLh and Ud-type interfaces; MAP basics where legacy still exists; and awareness of 5G UDM interfaces such as Nudm, enabling trace reading and mapping of errors to specific nodes and parameters.- FE behaviour (HLR-FE / HSS-FE / EIR-FE): Understanding of how these FEs behave in attach, RAU/LAU, EPS attach, IMS registration, authentication, subscription download/update and barring/roaming scenarios; plus EIR IMEI checks and their impact on attach/registration, enabling quick separation of "data issues" from "equipment issues."- Platform & cloud (CCSM + infrastructure): Comfort with CCSM concepts, including NFs, pods, instances, scaling, Day-0/Day-1 parameters and Diameter endpoints; Linux and basic Kubernetes/container troubleshooting, including logs, pods, CPU/RAM/disk; and reading CNF alarms/KPIs related to UDM/HSS-IMS.- Provisioning & data operations (CCDM/CUDB): Understanding of CCDM order flows, typical failures, bulk operations and migrations; ability to carry out safe subscriber-data corrections, consistency checks between CCDM/CUDB/FE, and design and execute rollback plans.- Support process & collaboration: Solid incident, change and problem management capability, including strong case notes, clear RCAs and impact analysis; plus the ability to work across IMS, EPC/5GC, RAN and BSS/Charging teams and explain complex UDM/UDC findings clearly to customers during high-pressure incidents.- 5GC/CCRC domain: Understanding of the role of CCRC with NRF, NSSF, DNS and SBI/HTTP2 in 5G Core.- Platform/cloud: Strong Linux skills, OpenStack basics, Kubernetes/containers and YAML-based configuration.- NRF/DNS/NSSF behaviour: Knowledge of geo-redundancy, database sync/resync and system expansion/reduction.- Operations & troubleshooting: Experience with install, upgrade and expansion activities; reading Kubernetes and NF logs; and debugging registration and slice-selection issues.
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 components (UDM, UDC, CCxx, CCSM, CCDM, CCRC)
- Strong Diameter protocol knowledge and interfaces (S6a, S6d, Cx, Sh, Gr, SLh, Ud)
- Understanding of subscriber data models and CUDB/UDR (keys, indexes, replication) and CCDM order flows
- Linux administration and Kubernetes/container troubleshooting (pods, logs, CPU/RAM/disk) and CNF alarm/KPI analysis
- OpenStack basics and YAML-based configuration experience
- Incident, change and problem management skills including clear case notes, RCAs and impact analysis
- Experience with provisioning/data corrections, consistency checks and rollback planning between CCDM/CUDB/FE
- Knowledge of 5GC interactions (Nudm, NRF, NSSF, DNS, SBI/HTTP2) and EPC/IMS behavior
- Ability to communicate technical status and resolution plans clearly to customers and stakeholders during high-priority incidents
- Experience with install, upgrade and expansion activities for carrier-grade systems
- Drive operational improvements via automation, documentation, mentoring and knowledge sharing
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.
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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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