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Ehsan User

@ehsanuser1

Telecommunications specialist with over 15 years of experience delivering and maintaining mobile core network solutions and services.

United Kingdom

Message

What I'm looking for

I seek a role delivering and evolving cloud core/IMS/5G solutions where I can lead deployments, optimize KPIs, mentor teams, and deepen hands-on cloud-core and automation skills.

I’ve supported VoIP, IMS, VoLTE, SVC, 5GC mobile cloud environments serving 2M to 100M subscribers, with hands-on contributions in service delivery, diagnostics, and platform stability.
My work spans mobile service delivery, signaling and KPI analysis, subscriber provisioning and number portability , network elements integration, fault management and isolation, and telecom security, combining deep signaling knowledge with a focus on service reliability and clear communication.
I thrive in high-pressure settings, collaborate across diverse technical teams, and mentor peers with a shared passion for learning. Whether supporting legacy systems or enabling new technologies, I bring adaptability, precision, and a commitment to scalable telecom evolution.

Experience

Work history, roles, and key accomplishments

Cloud Core Senior Engineer

Huawei Technologies

Oct 2023 - May 2025 (1 year 7 months)

Provided customer support and deployment for CS/VoLTE/SVC and 5G core components, improving SMS MO success by 4% and supporting AMF/UPF/SMF/UDM pilot provisioning for 5G NSA. Automated NP database workflows to improve operational efficiency and reduced manual overhead.

5GC SIP Diameter Automation SDM UDM UPF KPI Analysis Cloud NFV

EPC/IMS Cloud Core Specialist

Brtel Co.

Sep 2018 - Sep 2023 (5 years)

Led deployment and support of Cloud VoLTE and PS/EPC products, contributing to a 10% Opex reduction and launching a pure VoLTE network while owning PAC/ATP integration and pre-handover validation. Ensured stable operations across multiple core products.

EPC Validation Integration

CS/IMS Core Network Engineer

Huawei Technologies

Dec 2012 - Sep 2018 (5 years 9 months)

Managed CS core and cloud core operations across 2G/3G/4G/VoLTE, improved SLA compliance and fault resolution, optimized signaling gateway deployments, and received recognition for service improvements. Led KPI/QoS analysis to strengthen service continuity.

Signaling Analysis Fault Management

Network Performance Engineer

Mobinnet Co.

Jul 2010 - Oct 2012 (2 years 3 months)

Performed deep KPI and QoS analysis for WiMAX networks, produced actionable reports to maintain service performance and advised management on stability improvements. Delivered measurable insights to support operational decisions.

KPI Analysis WiMAX Reporting Network Measurement Spirent Wireshark Performance Optimization

CS Core Network Engineer

Taliya Mobile Co.

Jul 2006 - Jul 2010 (4 years)

Configured and maintained MSC/VLR/HLR and SMSC systems (Nokia Siemens), managed NOC operations and ticket workflows, and delivered daily KPI and availability reports to ensure operational efficiency. Supported 1st/2nd line fault resolution and escalations.

VLR Incident Management Remedy Monitoring