Messaging L2-L3 Support Engr

L&T Technology Services Limited.; Dallas (TX); On-site; USD 110,000 - 160,000; Full time

Job summary

L&T Technology Services Limited. is seeking a skilled telecom engineer to troubleshoot IMS/LTE/5G core networks, perform root cause analysis, and support emergency activities.

The candidate should be proficient with SIP, Diameter, H.248 protocols and have hands-on experience with protocol analyzers like Wireshark, Linux scripting, and cloud/container tooling. The role emphasizes end-to-end validation, performance KPIs, and automation to streamline incident handling in a demanding telecom

Qualifications

• Engineering degree required.
• Experience with IMS VoLTE and telecom core networks.
• Strong knowledge of SIP, Diameter, and H.248 protocols.

Skills

Troubleshooting

IMS Core networks

Root cause analysis

Case handling / emergency support

SIP/Diameter/H.248 protocols

Wireshark analysis

Linux

Scripting (Shell/Python)

IMS Core products (Nokia)

Automation / tooling

Education

Engineering Degree

Tools

Kubernetes

VMware

OpenStack

Job description

Job Description & Skill Requirement

• Proven experience with troubleshooting principles, methodologies, and issue resolution techniques in Telecom domain and IMS (4G/5G/LTE) Core networks.
• Experience in Case Handling, including Emergency Support activities.
• Experience in Conducting root cause analysis and recommend corrective actions to enhance customer experience.
• Extensive knowledge and expertise in the IMS VoLTE domain including Nokia IMS Core products such as CNCS, Nokia TAS, Nokia SBC, MRF, LIMS, SMSC/MMSC, BMC, Presence Server, UMC, SMS Gateway.
• Competences and Expertise in LTE/5G system validation (end-to-end performance, KPI handling, mobile devices).
• Deep knowledge and understanding of SIP, Diameter and H.248 Protocols including knowledge of TLS, IPSEC, RTP.
• Solid experience with Protocol Analyzer Tools (Wireshark) and internal message flow protocols.
• Knowledge and experience with Linux. Strong scripting skills and ability to automate manual tasks which could be easily converted to a script using shell, python.
• Knowledge of Kubernetes, VMWare, OpenStack, Kubernetes, CBIS, CBAM, and NCS.

Qualifications

• Engineering Degree.

LTTS is an Equal Opportunity Employer and maintains a clear policy against discrimination based on age, disability, sex, race, religion or belief, gender reassignment, marriage/civil partnership, pregnancy/maternity, or sexual orientation. As an inclusive organization, we actively endorse equal opportunities for all candidates with the right mix of talent, skills, and potential. We encourage applications from a diverse pool of candidates and selection for roles will solely be based on individual merit.

L&T Technology Services LTD is an equal opportunity employer and is committed to providing reasonable accommodations to qualified individuals with disabilities. If you require any accommodations to participate in the recruitment process or to perform the essential functions of the job, please let us know. We will work with you to provide reasonable accommodations in accordance with applicable law.