Join our TeamAbout this opportunityEricsson is seeking a highly skilled MS Core Cloud Specialist – CS Core · IMS to join our team in Sydney, NSW.
This senior role requires deep expertise in Ericsson IMS stack and Nokia MSS/MSC-S platforms to manage and evolve voice core infrastructure across Australian Data Centers.What you will doOperate and maintain Ericsson IMS nodes (P/S/I-CSCF, MGCF, MGW, HSS/HLR, TAS, SLF, BGCF, IBCF, TrGW, SBC) across Sydney Data CentersManage and maintain Nokia MSS (Mobile Softswitch) and MSC-S (MSC Server) nodes for CS Core voicePerform fault management, incident resolution, and root-cause analysis for IMS/CS Core outagesExecute software upgrades, patch management, and capacity expansions on Ericsson/Nokia platformsMonitor IMS and CS Core KPIs using Grafana, Kalix, Ericsson ENM; resolve degradations proactivelyPerform configuration management and provisioning using Ericsson ENM and OneFMDevelop and review MOPs for change management and maintenance windowsCollaborate with PS CORE, Fixed Voice, VAS, and NOC teams on cross-domain incidentsProvide Level 3 support and vendor TAC escalation management (Ericsson and Nokia)Maintain accurate network documentation and knowledge‐base articlesEducation and experienceEducation: Bachelor's in Telecom, Electronics, Computer Science or equivalentExperience: 15+ years CS Core/IMS — hands‐on Ericsson IMS and Nokia MSS/MSC‐SMandatory technical skillsEricsson: P/S/I-CSCF, MGCF/MGW, HSS, TAS, SBCNokia: MSS, MSC‐STool knowledgeGrafanaKalixEricsson ENMOneFMITSM / ServiceNowUnix / Linux CLIProtocol and technology knowledgeSIP / SIP‐IDiameterMAP / CAPISUP / SS7H.248 / MEGACOSIGTRANRTP / RTCPVoLTE / VoWiFiIPv4 / IPv6SCTPNode types and platformsEricsson – P/S/I-CSCF: IMS Call Session Control Functions – proxy, serving, interrogating CSCFEricsson – MGCF / MGW:



Media Gateway Control Function / Media Gateway – PSTN-IMS interworkingEricsson – HSS / HLR: Home Subscriber Server / Home Location Register – subscriber data managementEricsson – TAS: Telephony Application Server – VoLTE/VoWiFi call features and supplementary servicesEricsson – SLF / BGCF: Subscription Locator Function / Breakout Gateway Control FunctionEricsson – IBCF / TrGW: Interconnection Border Control Function / Transition Gateway – IMS peeringEricsson – SBC: Session Border Controller – SIP trunking, border security, media transcodingNokia – MSS: Mobile Softswitch Server – CS voice call control, mobility managementNokia – MSC‐S: Mobile Switching Centre Server – CS domain switching and handover controlAdditional advantages and requirementsAdded advantage: Good understanding of 5G VoNR and CS Core/IMS Core KPIs, with ability to interpret and act on IMS performance degradation trendsRight to Work: Full right to work in Australia; Sydney-based or relocatingWhy join Ericsson?
At Ericsson, you ́ll have an outstanding opportunity.
The chance to use your skills and imagination to push the boundaries of what ́s possible.
To build solutions never seen before to some of the world's toughest problems.
You ́ll be challenged, but you won't be alone.
You ́ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.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 Prospect Employer.
learn more.Primary country and city: Australia (AU) || Sydney
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📌 Ms Core Cloud Specialist Cs And Ims-1 (New South Wales)
🏢 Ericsson
📍 New South Wales