Domain Support Specialist CS Core
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About this opportunity:
Ericsson is currently seeking a dynamic Domain Support Specialist – CS Core, based in Noida, supporting Ericsson network architectures in a 24x7 environment. This is a hands-on, senior technical role owning configuration, troubleshooting, security compliance and operational integrity for CS Core and IMS network nodes. You will work closely with customers, third-party vendors and internal Ericsson teams to ensure stable live service delivery, drive continuous improvements to processes and procedures, and mentor peers to raise overall competence.
What you will do:
• Take ownership of day-to-day administration and support of CS Core and IMS nodes (configuration, upgrades/patches, health checks, backups).
• Monitor, review and drive closure of Trouble Tickets (TT), Change Requests (CR) and Acceptance Tests (AT); escalate and coordinate when needed.
• Perform preventive and corrective maintenance; execute planned maintenance windows.
• Troubleshoot and perform root-cause analysis for incidents and outages; prepare outage reports and follow-up remediation.
• Ensure MSTOP and other workplace processes are followed; enforce password, security and audit policies.
• Participate in technical discussions to improve network performance and resilience; recommend and implement best-practice changes.
• Interface with customers, 3rd-party vendors and project teams to ensure smooth handovers and successful deliveries.
• Create and improve procedures, runbooks and routine documentation; support audits and compliance activities.
• Mentor and guide peers, share knowledge and promote a culture of continuous learning.
The skills you bring:
• B.E. / B.Tech. in Electronics & Communication (or equivalent).
• 3–7 years’ experience in the telecom industry, with demonstrated experience in CS Core and IMS domains. Experience with Ericsson networks preferred.
• Comfortable working in a 24x7 support environment and handling emergency incidents.
• Strong practical knowledge of CS Core and IMS network nodes and their behavior (call flows, call scenarios, AT cases).
• Protocol expertise: SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, SIP, SDP, GTP, Diameter.
• Ericsson core hardware and virtual nodes (examples: Blade Cluster, APG 43L, M-MGw GMPv4, SIS-BC, BSP-BC, APZ series, and virtual IMS nodes such as SBG, BGF, MRS).
• Solid understanding of 2G/3G/4G/LTE and VoLTE/IMS architectures and performance characteristics.
• Proven troubleshooting, problem analysis and incident management skills (TT/CSR/TR/SR lifecycle).
• Familiarity with operational tasks: configuration management, CR execution, AT/acceptance processes, backups and health checks.
• Experience interfacing with customers, vendors and cross-functional teams.
“All academic credentials must be from recognized and accredited institutions and are further subject to verification.”
Why 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.
What happens once you apply?Click Here to find all you need to know about what our typical hiring process looks like.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 Opportunity Employer. learn more.
Primary country and city: India (IN) || Noida
Req ID: 789817