About this opportunity:
At Ericsson, we are seeking an experienced Support Engineer to join a specialist CCxx/UDM team in Australia, supporting 5G Core and Cloud Core solutions for NACI customers. This is a pivotal opportunity to work on complex L2/L3 incidents, improve live network stability and contribute directly to the reliable delivery of high-performing 5G Cloud Core services. You will work closely with product, project, service delivery and problem management teams to reduce outages, prevent repeat faults and safely introduce new CCxx releases into customer networks. The role suits a technically strong, customer-focused engineer who thrives in carrier-grade environments, takes ownership of critical issues and is committed to 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 in live, carrier-grade, customer-facing environments.- Analyse system behaviour, logs, network flows, trace data and distributed platform performance to identify root causes and prevent repeat faults.- Collaborate with product, project, service delivery, IMS, EPC/5GC, RAN and BSS/Charging teams to improve service stability and resolve cross-domain issues.- Provide clear customer and stakeholder updates, technical guidance, resolution plans, RCAs and impact analysis during high-priority incidents.- Drive operational efficiency through automation, documentation, knowledge sharing, mentoring and continuous improvement initiatives.
The skills you bring:- Deep understanding of UDC/UDM architecture and how CUDB/UDR, HLR-FE, HSS-FE, EIR-FE, CCRC, CCSM and CCDM work together, including subscriber data models, keys, indexes, replication and subscription flows from CCDM to FEs, EPC/IMS and PACO.- Strong protocol and interface knowledge, especially Diameter across S6a/S6d, Cx, Sh, Gr, SLh and Ud-type interfaces, MAP basics for legacy environments and awareness of 5G UDM interfaces such as Nudm.- Practical experience with HLR-FE, HSS-FE and EIR-FE behaviour across attach, RAU/LAU, EPS attach, IMS registration, authentication, subscription download/update, barring, roaming and IMEI-check scenarios.- Strong platform and cloud troubleshooting capability across CCSM, NFs, pods, instances, scaling, Day-0/Day-1 parameters, Diameter endpoints, Linux, Kubernetes, containers, YAML configuration, alarms, KPIs, CPU, RAM and disk.- Experience with CCDM/CUDB provisioning and data operations, including order flows, bulk operations, migrations, consistency checks, safe subscriber-data correction and rollback planning.- Solid incident, change and problem management skills, with the ability to produce strong case notes, explain complex UDM/UDC findings clearly and collaborate effectively during high-pressure customer incidents.- 5GC/CCRC knowledge, including CCRC interaction with NRF, NSSF, DNS and SBI/HTTP2, plus geo-redundancy, database sync/resync, system expansion/reduction, install, upgrade and expansion activities.- Ability to read Kubernetes and NF logs and troubleshoot registration, slice-selection, service discovery, routing and platform-related issues across cloud-native 5G Core environments.
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
Skills Required
- Deep understanding of UDC/UDM architecture, including CUDB/UDR, HLR-FE, HSS-FE, EIR-FE, CCRC, CCSM, and CCDM
- Strong Diameter protocol and interface knowledge across S6a/S6d, Cx, Sh, Gr, SLh, and Ud-type interfaces
- Basic knowledge of MAP and awareness of 5G UDM Nudm interfaces
- Practical experience troubleshooting HLR-FE, HSS-FE, and EIR-FE behavior across telecom registration, authentication, roaming, and IMEI-check scenarios
- Strong platform and cloud troubleshooting skills with Linux, Kubernetes, containers, YAML configuration, alarms, KPIs, CPU, RAM, and disk
- Experience with CCDM/CUDB provisioning and data operations, including bulk operations, migrations, consistency checks, corrections, and rollback planning
- Solid incident, change, and problem management skills
- Knowledge of 5GC/CCRC, NRF, NSSF, DNS, SBI/HTTP2, geo-redundancy, database synchronization, installation, upgrades, and expansion activities
- Ability to read Kubernetes and network-function logs and troubleshoot registration, slice selection, service discovery, routing, and platform issues
- Ability to communicate complex technical findings clearly and collaborate during high-pressure customer incidents
What the Team is Saying
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Ericsson Compensation & Benefits Highlights
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Healthcare Strength — Health coverage is described as broad and reliable, with multiple medical plan choices, dental/vision, and mental-health/EAP resources. Available descriptions highlight healthcare and disability insurance as consistent strengths.
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Retirement Support — U.S. materials point to an automatic company 401(k) contribution plus matching that can add up to a notably high employer contribution, and some regions also offer pension options. This structure is often cited as a meaningful component of total rewards.
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Leave & Time Off Breadth — Time-off programs are characterized as generous, with sizable vacation allowances, paid holidays, sick time, volunteer time, and strong parental leave in some locations. PTO is frequently highlighted as a standout element of the package.
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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Employees engage in a combination of remote and on-site work.
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