Network Engineer, 5G Core engineer, QA Tester

NIAZ HUSSAIN

Plano, Texas 425-***-**** ️ *********@*****.***

linkedin.com/in/niaz-hussain-07735555

Professional Summary

Results-driven Network Engineer & IMS Core Specialist with 5+ years of experience in telecom and network operations, designing, deploying, and validating 4G/5G core networks, VoIP/IMS services, and enterprise IT infrastructure. Proven expertise in messaging network technologies (Mavenir SMS, MMS, RCS, VMAS, mStore) and 5G core functions (AMF, SMF, UPF, NRF, NSSF). Skilled in network monitoring, outage management, troubleshooting, and pre/post-deployment validation. Strong knowledge of Diameter, SIP, and IP networking, with hands-on experience in Wireshark, Splunk, OpenSearch, and Microsoft Office Suite. Recognized for leadership, mentoring, documentation, and stakeholder coordination in fast-paced operational environments.

Core Competencies

Networking & Protocols

BGP, OSPF, MPLS,GRE, IPSEC

VLAN, VxLAN, STP, vPC/MLAG, QoS, HSRP/VRRP

Multicast (PIM, RP, MSDP, IGMP v2/v3)

GSM, UMTS, LTE, 5G NR, IP, Messaging

IMS & Telecom

SIP, Diameter, VoLTE, VoWiFi, BVoIP, E911

Mavenir SMS, MMS, RCS, VMAS, mStore

5G Core Functions: AMF, SMF, UPF, NRF, NSSF

Telecom Operations Network Operations Messaging Platforms

Automation & Cloud

Python, Bash, Shell, Perl, CI/CD

AWS, OpenStack, Linux/Unix

REST API, Power BI, Tableau

AI Server Repair (diagnostics, OS rebuilds, virtualization)

Tools & Platforms

Wireshark, tcpdump, OpenSearch, Splunk, One Console, NetScout, CyberArk

QXDM, Microsoft Office Suite, Visio, Network Databases, Ticketing Systems

Operational & NOC Functions

Subject Matter Expert (SME) Alarm Monitoring KPI Monitoring

Ticket Handling Incident Escalation Change Execution

Break-Fix Support Capital Program Deployment Support

Real-Time Network Monitoring Maintenance Scheduling

Operational Documentation Training Program Development

Troubleshooting Bridges Performance Optimization

Soft Skills & Leadership

Leadership Mentorship Communication Documentation

Stakeholder Coordination Problem Solving Team Collaboration

Critical Thinking 24/7 Availability On-Call Support

Professional Experience

AI Server Specialist – Network Operations

SMS Infocomm Corporation / Onrack – Plano, TX

Sep 2025 – Present

Perform end-to-end testing, assembly, repair, and replacement of AI server components, ensuring high reliability and system uptime.

Conduct hardware diagnostics, inspection, and quality control of AI servers and networking components.

Handle E2E validation of server hardware and firmware, verifying system performance against client and OEM specifications.

Troubleshoot network connectivity, storage interface, and OS-level issues in AI and cloud server environments.

Collaborate with engineering teams to resolve production and post-deployment issues, maintaining strict SLA compliance.

Manage documentation, test reports, and defect tracking using internal ticketing tools and MS Office Suite.

Support data center infrastructure operations and preventive maintenance schedules.

Apply strong analytical skills and problem-solving techniques for component-level diagnostics and failure analysis.

Network & IMS Core Test Lead

AT&T (via Inabia / Tech.M / SNF LLC) – Plano, TX / Redmond, WA

Apr 2021 – Oct 2024

Served as Subject Matter Expert (SME) for IMS, messaging, and prepaid SurePay validation in AT&T’s 4G/5G mobile core.

Led integration, testing, and troubleshooting of BGP/MPLS-based core features and 5G core functions (AMF, SMF, UPF, NRF, NSSF).

Validated SIP/IMS call flows for VoLTE, VoWiFi, E911, and BVoIP; managed Diameter signaling and network stability checks.

Conducted network outage management and alarm monitoring using Splunk, OpenSearch, NetScout, and CyberArk.

Collected and analyzed logs using Wireshark, tcpdump, QXDM, and TEMS to troubleshoot live network incidents.

Supported capital program deployments, break-fix operations, and real-time monitoring to ensure network integrity.

Automated workflows with Python/Bash, reducing regression and test cycles by 30%.

Created operational documentation, training programs, and technical playbooks for NOC and field teams.

Delivered AI server repair and IT support, including diagnostics, OS rebuilds, and virtualization setup.

Collaborated with deployment teams for troubleshooting bridges and resolution of service-impacting events.

Key Projects:

IoT Connected Cars Testing – Validated IMS/SIP flows for automotive platforms, ensuring E911 and VoLTE compliance.

Prepaid Core Regression – Automated ACP-based validation and KPI monitoring, improving post-deployment stability.

Network & IT Support (Freelance)

Thumbtack – Remote

Oct 2024 – September 2025

Delivered remote IT and network support for SMB clients, handling hardware/software troubleshooting, OS rebuilds, and virtualization.

Provided technical consultation and preventive maintenance for home and small business networks.

Implemented data backup and recovery solutions, ensuring service continuity.

Education

Diploma in Information Technology – SBTE

MA – University of Sindh, Jamshoro

Certifications

CCNA – Valid

AWS Solutions Architect – Associate (Valid through 2026)

Google IT Support Professional

AT&T Internal Training: 3GPP Core Architecture, Radio Optimization, IoT Network Ops

Career Highlights

Led validation of IMS/VoIP and 5G messaging features across AT&T’s core networks.

Delivered end-to-end NOC operations, including outage management, KPI monitoring, and alarm resolution.

Conducted AI server assembly, repair, and quality control for large-scale enterprise deployments.

Automated test and deployment workflows, improving delivery efficiency by 30%.

Recognized for cross-team collaboration, leadership, and network performance optimization.

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