Senior MS Core & IMS Cloud Specialist

Ericsson AB; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

Ericsson is seeking a highly skilled MS Core Cloud Specialist – CS Core · IMS to join our team in Sydney, NSW. This senior role demands deep Ericsson IMS stack expertise and Nokia MSS/MSC-S experience to manage and evolve voice core infrastructure across Australian Data Centers.

You will operate IMS nodes, manage Nokia CS Core platforms, perform fault analysis, and implement upgrades while monitoring KPIs using Grafana, Kalix, and ENM.

Qualifications

• 15+ years CS Core/IMS with hands-on Ericsson IMS and Nokia MSS/MSC-S experience.
• Bachelor’s in Telecom, Electronics, Computer Science or equivalent.
• Experience operating and evolving voice core infrastructure in data centers.

Responsibilities

• Operate and maintain Ericsson IMS nodes (P/S/I-CSCF, MGCF, MGW, HSS/HLR, TAS, SLF, BGCF, IBCF, TrGW, SBC) across Sydney Data Centers.
• Manage Nokia MSS and MSC-S nodes for CS Core voice.
• Perform fault management, incident resolution, and root-cause analysis for IMS/CS Core outages.
• Execute software upgrades, patch management, and capacity expansions on Ericsson/Nokia platforms.
• Monitor IMS and CS Core KPIs using Grafana, Kalix, Ericsson ENM; resolve degradations proactively.
• Perform configuration management and provisioning using Ericsson ENM and OneFM.
• Develop and review change management documentation and maintenance windows (MOPs).
• Collaborate with PS CORE, Fixed Voice, VAS, and NOC teams on cross-domain incidents.
• Provide Level 3 support and vendor TAC escalation management (Ericsson and Nokia).
• Maintain accurate network documentation and knowledge-base articles.

Skills

IMS/CS Core expertise

Ericsson IMS

Nokia MSS/MSC-S

VoLTE/VoWiFi

Education

Bachelor’s in Telecom/Electronics/CS

Tools

Grafana

Kalix

Ericsson ENM

OneFM

ITSM/ServiceNow

Unix/Linux CLI

Job description

Ericsson is seeking a highly skilled MS Core Cloud Specialist – CS Core · IMS to join our team in Sydney, NSW. This senior role demands deep Ericsson IMS stack expertise and Nokia MSS/MSC-S experience to manage and evolve voice core infrastructure across Australian Data Centers.

You will operate IMS nodes, manage Nokia CS Core platforms, perform fault analysis, and implement upgrades while monitoring KPIs using Grafana, Kalix, and ENM.