Customer Support Systems Engineer

Network & *G Core Engineer

Edgar Oliver Mercado Rojas

Mobile: +1-425-***-****

Email: ********@*****.***

Summary

Experienced Computer Systems Engineer with 12+ years in the Telecom industry specializing in Network and 5G Core engineering. Proven track record in delivering robust solutions and providing exceptional customer support. Expertise in optimizing network performance and implementing cutting-edge technologies to drive operational excellence.

Strong experience with Nokia/Ericsson Network elements VNF/CNF (MME, AMF, NRF, NSSF, CMG, SMF, UPF, CMU, UDM).

Open source: (Linux, Solaris, Grafana, Prometheus).

Virtualization/Cloud: (OpenShift, Azure CI/CD Pipelines, AWS, Kubernetes, VMware ESX, Virtual box, OpenStack, NCS, NCOM).

Technologies: (GSM, UMTS, WCDMA, 2G, 3G, 4G, LTE, 5G).

Professional Experience

Nokia / United States.

Position: 5G Core Engineer

Period: January 2019 – Current.

Led the successful deployment and integration of Nokia 5G Core VNF & CNF elements, ensuring optimal performance and achieving a seamless migration in the T-Mobile Production & Lab environment, which enhanced system reliability and reduced downtime by 50%.

Performed OpenStack-CBIS/NCS/Azure CI/CD pipeline deployment, significantly enhancing the efficiency and reliability of SW delivery processes for the TMO Production Network.

Led the successful deployment First Office Application (FOA) initiative at T-Mobile, ensuring flawless execution and operational readiness of new Releases in production.

Leveraged Wireshark for in-depth analysis of network traffic.

Analysis, preparation, integration, migration, validation, and regression testing activities for TMO laboratory environment.

AT&T / United States.

Position: Mobility Network Support Engineer.

Period: February 2018 – January 2019.

Work at AT&T's laboratory environment, collaborating with cross-functional teams to conduct Software testing and Validation.

Support Ericsson EPC & RAN Testing and TOL Development.

Hands on with Ericsson EPC Elements.

Leveraged Wireshark for in-depth analysis of network traffic.

Ericsson / Mexico.

Position: EPC & RAN Integration Engineer.

Period: September 2011 – January 2018

Demonstrated technical proficiency and expertise E2E technical understanding and protocol analysis, ensuring network architecture and proactive issue resolution.

Spearheaded the enhancement of 3G and LTE network coverage across LATAM, leveraging deep technical expertise in CORE/RAN Elements to optimize network performance and expand service availability.

Successfully supported the seamless integration of RNC-BSC with Ericsson SGSN-MME Core systems, ensuring interoperability and smooth operation.

Played a key role in the integration and deployment of EnodeB LTE technology within Ericsson EPC infrastructure, contributing to the advancement of high-speed data services and improved network capacity.

Led comprehensive analysis, preparation, integration, and migration efforts on productive networks.

Prepared and executed System, Module, and Acceptance Tests, identifying, and driving improvements in network performance and reliability, resulting in enhanced service quality and customer satisfaction.

Selection of Assignments:

RAN & EPC Validation Lab & Production network Support: T-Mobile / United States.

EPC & RAN Validation and Regression: AT&T / United States.

EPC CMM/CMG Deployment: Turk cell / Turkey.

CMU (CMM, CMG, APC) SW Validation and Regression: TELUS / Canada.

Customer Support of EPC LTE access. Brazil 2014 World Cup. Claro / Brazil.

SGSN-MME Ericsson Software Upgrades EPC for Tim / Brazil.

Technical Coordinator Core and RAN data-migration: Claro / Brazil.

Nokia CMU SW validation and Regression for P-LTE network: HECO / Hawaii

VoLTE, MME consulting support: US-Cellular / United States.

RAN & EPC Integration: Digicel / Haiti.

RAN & EPC Integration: AT&T / Mexico.

Education

Bachelor Computer Systems Engineering, Universidad Tecnologica de Mexico, 2011, Ced. 7955415.

Certifications

Nokia L4 5G Core Engineer.

Nokia L3 Cloud Packet Core R22 Integration Engineer.

Nokia L3 5G Core Integration Engineer

Nokia Mobility Manager.

Nokia L3 5G Core Architect.

CCNA R&S ID CSCO12484559

CCNA Certification Wireless ID CSCO12484559

CCNP Wireless Representative ID CSCO12484559

Ericsson Certified Associate 4G-IP ECP74762.

Ericsson Professional Packet Core ECP74762

Languages

• English -Fluent

• Portuguese -Native

• Spanish - Native

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