About this opportunity:
Ericsson is currently seeking a dynamic Engineer - 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.
Skills Required
- B.E. / B.Tech. in Electronics & Communication or equivalent
- 3-7 years experience in telecom, with demonstrated CS Core and IMS domain experience
- Experience with Ericsson networks (preferred)
- Ability to work in a 24x7 support environment and handle emergency incidents
- Practical knowledge of CS Core and IMS node behavior, call flows and AT cases
- Protocol expertise: SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, SIP, SDP, GTP, Diameter
- Familiarity with Ericsson core hardware and virtual nodes (Blade Cluster, APG 43L, M-MGw GMPv4, SIS-BC, BSP-BC, APZ series, SBG, BGF, MRS)
- Solid understanding of 2G/3G/4G/LTE and VoLTE/IMS architectures and performance
- Proven troubleshooting, incident management and root-cause analysis 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
What the Team is Saying
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Ericsson Compensation & Benefits Highlights
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Healthcare Strength — Healthcare coverage includes employer‑verified medical, dental, and vision plans, along with HSAs/FSAs and EAP/mental‑health support. Wellbeing initiatives are highlighted as part of Life at Ericsson.
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Retirement Support — Retirement programs include a 401(k) with company matching that is employer‑verified, with mentions of match levels varying by time and team and pension support in some regions. This is frequently cited as a solid pillar of the package.
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Parental & Family Support — Paid parental leave is described as competitive in many U.S. postings, with examples up to 16 weeks maternity and 6 weeks parental/adoption at 100% pay. Family‑friendly policies and return‑to‑work support are also called out.
Ericsson Insights
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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Ericsson adopts a hybrid work model globally because we know balance matters. Sometimes things are better in real life. Other times we can be more productive at home. Our hybrid approach gives you the best of both worlds.
