Job Description

Join our Team

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About this opportunity

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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 recent 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.

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What you will do

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- Lead investigations and drive the resolution of complex L2/L3 incidents across IMS, 5G Core and Cloud Core environments.
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- Restore customer networks and services during critical incidents, taking ownership of fault isolation, advanced troubleshooting and service recovery.
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- Analyse system behaviour, identify root causes and work with problem management to prevent repeat faults and improve live network stability.
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- Collaborate with product, project and delivery teams to support safe introduction of new CCxx releases and operational changes.
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- Communicate clearly with customers and internal stakeholders during high-pressure incidents, providing timely updates and practical technical guidance.
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- Drive operational efficiencies through automation, knowledge sharing, mentoring and continuous improvement.
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- Independently manage support cases, resolve critical issues without escalation where possible, and contribute to reduced turnaround times.
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The skills you bring

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- Strong understanding of IMS architecture and call flows, including P/I/S-CSCF, BGCF, MGCF, SBC, TAS/MMTel, HSS/UDM, PCRF/PCF, AS and related network functions.
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- Knowledge of VoLTE, VoWiFi and VoBB fundamentals, including registration, originating and terminating calls, supplementary services, SMS over IMS,



emergency calls, interconnect and roaming scenarios.
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- Familiarity with vendor-specific IMS implementations and common deployment topologies.
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- SIP and SDP expertise, including method types, dialogs, routing, forking, error codes, re-INVITE and UPDATE.
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- Diameter knowledge across Cx, Sh, Ro, Rx, Gy/Gx interfaces, with exposure to Radius where applicable.
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- Solid IP networking capability, including IPv4/IPv6, routing, VLANs, DNS/ENUM, NAT, firewalls, load balancers and QoS.
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- Understanding of TLS/IPSec, certificates and basic security concepts for signaling and media.
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- Linux administration skills, including system, networking, storage and performance basics.
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- Experience with virtualization and cloud/NFVI concepts, including VMs, OpenStack, VMware and increasingly containers/Kubernetes for cloud-native IMS.
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- Proficiency with tracing and analysis tools such as tcpdump, Wireshark, vendor trace tools, log parsing, KPI/alarm monitoring, NMS/EMS, Grafana, Prometheus or equivalent platforms.
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- Scripting and automation capability using bash, Python, Ansible or similar tools for log extraction, health checks and repetitive operational tasks.
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Support / operations skills

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- End-to-end troubleshooting mindset, with the ability to correlate alarms, logs, traces and KPIs to isolate root cause.
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Why join us

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Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do.

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We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth.

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We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team.

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Ericsson is proud to be an Equal Opportunity Employer.

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Primary country and city: Australia (AU) || Sydney

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Job details: Support Engineer

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Job Stage: Job Stage 6

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Primary Recruiter: Carolyn Larsen

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Hiring Manager: Pankaj Kumar Dwivedi

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📌 Customer Network Support Engineer Sydney,New South Wales,Australia Service Delivery Posted 11 hours
🏢 Ericsson
📍 New South Wales