Sr Subject Matter Expert (Support&Ops)

Job description

Job Description: 5GC L3 Operation Engineer (Contractor) Position Information Department: Core Network Operations Department Section: Packet Core Operations Section / Core Operations Governance Section Group: TBD(L4) / Core Quality & Capacity Management Group Contract Type: Independent Contractor (Quasi-Mandate Agreement) Working Style: Daytime support during RMI/RSI business days, with off-hours work (including nights, weekends, and holidays) only upon explicit instruction from RMI/RSI via email, message, or other clear communication. 2. Mission To maximize the availability and reliability of the 5GC network by providing high-level L3 technical support, leading rapid incident resolution, conducting root cause analysis, driving L1/L2 technical development through OJT, and facilitating operational automation. Key Responsibilities 3. Key Deliverables & Responsibilities Incident Resolution & RCA: Provide advanced technical analysis for complex incidents within the 5GC network and lead root cause identification. Deliverables: Timesheet. Deliverables: Incident analysis reports, Root Cause Analysis (RCA) reports. Vendor Technical Liaison: Collaborate with VNF/CNF vendors to discuss technical issues, validate bug fixes, and ensure the implementation of permanent solutions. Deliverables: Technical inquiry records, patch validation reports. Knowledge Transfer (KT) & OJT: Conduct On-the-Job Training (OJT) for L1/L2 engineers through real-world incident handling and operational tasks to enhance their technical capabilities. Deliverables: OJT records, training materials, technical knowledge base (KB) documentation, Q&A repositories. Operational Optimization & Automation Support: Propose improvements for operational procedures and monitoring processes based on troubleshooting insights and provide technical assistance for operational automation. Deliverables: Updated operational procedures, KB documentation, technical proposals/implementation support for automation tools and scripts. 4. Required Qualifications Experienced years ： 10+ years’ experience in telecom industries including 5+ years NOC operations or 2+ years NOC management in Packet Core domain. Skill Requirements Technical Expertise: Deep knowledge of 5G Core (AMF, SMF, UPF , etc.), 4G Core (MME, CUPS, SGW, PGW) and SGi (NAT, DPI: Deep Packet Inspection) design and operations. Proven experience in operating and troubleshooting container platform environments using Kubernetes. Experience in operations and maintenance of container-based network platforms in large-scale telecommunications environments. Strong protocol-level analysis skills using packet analysis tools (e.g., Wireshark, Tcpdump). Experience: Proven track record as an L3 Support Engineer or Subject Matter Expert (SME) in large-scale telecommunications networks. Demonstrated experience in technical mentoring and training (e.g., OJT, knowledge transfer). Language & Soft Skills: Fluent in English, capable of conducting technical negotiations with global vendors. Japanese language capability is not mandated. Professional mindset with the ability to remain calm, autonomous, and decisive during high-pressure incident response situations. 5. Preferred Qualifications Experience in performance optimization and tuning for large-scale traffic environments. 6. Workload & Operational Scale (For Accurate Staffing Estimates) The current JD should be interpreted as daytime support during RMI business days with a baseline staffing assumption of 3 personnel. Vendors should base their proposal on this scope, while allowing exception-based off-hours support only upon explicit instruction from RMI. Other Requirements • Scale of Managed Environment: • Please, note that traffic part is confidential. • Number of CNFs: AMF, SMF (nodes count will be expanded with customer demands • Traffic volume (4G/5G NSA): no traffic as on today, 4G complete traffic will be shifted gradually from existing components from August onwards. • Traffic volume (5G SA): 5GC launch will be planned on Q4 2026. • Ticket volume: 10 tickets per month is expected against the product suppliers those are taken by L2. Apply now Information at a Glance Why HCLTech? At HCLTech, you'll supercharge your potential. You'll find your career. And you'll find your spark. All at a place that knows that helping its customers stay on top starts by putting its people first. HCLTech is a global technology company, home to more than 230,000 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending September 2026 totaled $14.8 billion. • Disclaimer • Privacy Statement • Terms of use • Sitemap • Raise a Grievance • We use cookies on our site. Please read more about cookies policy here. • Opens in a new tab. • Opens in a new tab. • Opens in a new tab. • Opens in a new tab. • Opens in a new tab. • Opens in a new tab. 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