About the Opportunity
We are looking for a Senior Engineer - IMS to join our team and lead the coordination, execution, and troubleshooting of high-level reactive maintenance activities in Core Network domains. You will be responsible for supporting complex technical issues beyond the scope of 1st level Operations, ensuring service continuity and adherence to processes like MSTOP.
What You Will Do
- Perform configuration changes, hardware expansions, and troubleshooting activities for:
- CS Core Nodes: MSC, MGW, HLR, HSS, STP, SBC
- IMS Core Nodes: UDM (CUDB, HSS-FE, HLR-FE), P-CSCF, I-CSCF, S-CSCF, ATS, MGCF, MRFP, CG, ENUM, DRA, UPG
- Ensure all actions follow approved and standardized operational processes (MSTOP)
- Conduct RCA (Root Cause Analysis) and prepare technical reports
- Collaborate with cross-functional teams to drive issue resolution and network enhancements
- Maintain documentation of configurations, issues, and resolutions
You Will Bring
- Strong knowledge of telecom protocols including:
- SIP, H.248, SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, Diameter
- Deep understanding of:
- Call flows in CS Core
- IMS / VoLTE architecture and operations
- Ability to troubleshoot and resolve complex IMS and legacy network issues
- Strong analytical and communication skills
Key Qualifications
- Education: Bachelor's degree in Electronics and Communication Engineering or related field
- Experience:7+ Relevant years in Core Network operations and support, particularly IMS/VoLTE
- Relevant certifications in IMS, VoLTE, or Network Operations (optional but preferred)
What happens once you apply?
Click Here to find all you need to know about what our typical hiring process looks like.
Notice of Job Opportunity - Legal Notices for PERM
We encourage you to consider applying to jobs where you might not meet all the criteria. We recognize that we all have transferrable skills, and we can support you with the skills that you need to develop.
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 and Affirmative Action employer, learn more .
If you need assistance or to request an accommodation due to a disability, please contact Ericsson at [email protected]
DISCLAIMER: The above statements are intended to describe the general nature and level of work being performed by employees in this position. They are not an exhaustive list of all responsibilities, duties and skills required for this position, and you may be required to perform additional job tasks as assigned.
Primary country and city: India (IN) || Noida
Job details: MS Core and Cloud Specialist
Job Stage: Job Stage 5
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What the Team is Saying
What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks, platforms, and systems that billions of people, businesses, and societies depend on every day.
We are a global leader in communications technology, delivering mobile network infrastructure, cloud software, and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries, helping power everyday communication as well as critical digital services at global scale.
Connectivity has evolved far beyond consumer mobile use. Today, nearly 80% of the world’s population accesses the internet via mobile networks, and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced, developing network APIs that open connectivity to the global developer ecosystem, and applying automation and AI to make networks more intelligent, efficient, and resilient.
Ericsson was the first company to launch live 5G networks on five continents, and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36,000 enterprise customers, enabling secure, high-performance connectivity for industries such as manufacturing, aviation, logistics, utilities, and public safety, where reliability and performance are mission critical.
Innovation is central to how we work. Ericsson has approximately 28,000 employees in research and development, backed by one of the strongest intellectual property portfolios in the industry with 60,000+ granted patents. Our engineers, researchers, and technologists work across 100+ global R&D sites, helping define how networks evolve and how digital infrastructure is built for the long term.
As the world moves toward a mobile-first, AI-powered, and cloud-driven future, connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation, shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact, today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day, tackle complex challenges in live environments, and keep developing your skills and career in your own vision.
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