Join our Team
About this opportunity
Ericsson 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 do
- 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 and maintain Nokia MSS (Mobile Softswitch) and MSC-S (MSC Server) 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 MOPs for change management and maintenance windows
- 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
You will bring
Education and experience
- Education: Bachelor’s in Telecom, Electronics, Computer Science or equivalent
- Experience: 15+ years CS Core/IMS — hands-on Ericsson IMS and Nokia MSS/MSC-S
Mandatory technical skills
- Ericsson: P/S/I-CSCF, MGCF/MGW, HSS, TAS, SBC
- Nokia: MSS, MSC-S
Tool knowledge
- Grafana
- Kalix
- Ericsson ENM
- OneFM
- ITSM / ServiceNow
- Unix / Linux CLI
Protocol and technology knowledge