Impress employers and recruiters.
Choose from hundreds of resume examples.

Target Resume Now

About the Role

Ericsson is 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. This role involves owning complex L2/L3 incidents, improving live network stability, and collaborating with various teams to reduce outages and ensure the safe introduction of new releases. The goal is to deliver reliable, high-performing 5G Cloud Core solutions, ensuring customer satisfaction and operational excellence.

Responsibilities

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.
Analyze system behavior, 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 the 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.

Requirements

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.
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.
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.

Skills

IMS
VoLTE
VoWiFi
VoBB
SIP
SDP
Diameter
Radius
IP Networking
IPv4
IPv6
DNS
ENUM
NAT
TLS
IPSec
Linux Administration
Virtualization
Cloud/NFVI
OpenStack
VMware
Containers
Kubernetes

Location

Sydney, Australia

Work Type

Full-time

About the Company

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.

Equal Opportunity

Ericsson is proud to be an Equal Opportunity Employer.