Senior Wireless RAN Engineer with 25 Years Experience

Andy Yoon

703-***-**** ********@*****.***

LinkedIn: linkedin.com/in/andy-yoon-a6686010b

SENIOR / PRINCIPAL WIRELESS RAN ENGINEER

Senior Wireless Telecom Engineer with 24+ years of experience delivering end-to-end RAN design, integration, testing, optimization, and deployment across 3G, 4G LTE, and 5G (SA/NSA, O-RAN) environments. Proven technical leader across Tier-1 operators and vendors, with deep expertise in RAN software validation, CI/CD, RF performance, lab-to-field deployment, and multi-vendor interoperability. PMP-certified with experience leading large-scale programs and cross-functional teams. CORE TECHNICAL SKILLS

WIRELESS TECHNOLOGIES:

5G NR (SA/NSA), LTE, VoLTE, VoNR, 3G, O-RAN, IP Networking RAN VENDORS & PLATFORMS:

Ericsson and Samsung RAN(BBU+Radio), Radisys O-RAN w/ Intel L1, Foxconn O-RU TESTING & OPTIMIZATION TOOLS:

IXIA, Wireshark, XCAL/XCAP, TM500 (Viavi), RF Spectrum Analyzer PROTOCOLS & ANALYSIS:

L3/L2 Signaling, Call Flows, Handover, Data Throughput, KPI Analysis, 911/E911 AUTOMATION & PROGRAMMING:

Python, C++, CI/CD (JIRA), Test Automation Frameworks LEADERSHIP & DELIVERY:

System Validation, Lab Operations, Customer Support, Deployment Oversight, DevOps Collaboration PROFESSIONAL EXPERIENCE

RF ENGINEER IV

ERICSSON SEP 2022 – PRESENT

• Lead lab validation of new Ericsson RAN software for T-Mobile CI/CD programs, covering feature verification and regression testing.

• Validated VoNR, VoLTE, data sessions, mobility/handover, and E911 under multi-user and stress conditions.

• Provided advanced RF and L3 troubleshooting to meet customer-specific performance and quality requirements.

• Monitored and analyzed commercial network RF KPIs and user traffic trends, identifying root causes and recommending optimization actions.

• Acted as a technical escalation point between the customer, RAN development, and lab teams. Page 2

5G RAN ENGINEER

DEEPSIG DEC 2021 – FEB 2023

• Designed and operated end-to-end 5G SA lab environments to validate AI/ML-based uplink RF enhancement solutions.

• Executed 5G UL performance testing across multiple RF configurations, validating gains introduced by new software releases.

• Integrated and deployed vendor software packages, demonstrating system-level performance improvements.

• Worked with TM500 (Viavi) and a self-developed RIC for advanced O-RAN testing.

• Built and validated a full O-RAN architecture, including: o 5G Core (AMF, SMF, UPF – Radisys)

o 5G SA RAN (Radisys L3/L2 + Intel L1)

o O-RU (Foxconn)

o Multi-vendor UE (Samsung, Google, Huawei)

PRINCIPAL ENGINEER

ACCUVER JAN 2019 – NOV 2021

• Served as on-site Principal Engineer for T-Mobile, supporting 4G/5G RAN software validation programs.

• Operated and customized Accuver’s automation platforms (XCAL/XCAP) for large-scale test execution, troubleshooting, and results analysis.

• Validated RAN software from Ericsson, Nokia, and Samsung against customer-defined acceptance criteria.

• Collaborated with Accuver HQ developers as part of a DevOps initiative, contributing to automation framework enhancements and CI workflows.

PRINCIPAL ENGINEER

SAMSUNG ELECTRONICS MAR 2001 – DEC 2018

RAN System Test Engineer (2001 – 2013)

• Led lab-based system validation for CDMA, GSM, and LTE RAN software.

• Conducted performance, stability, and stress testing using IXIA and TM500 under heavy traffic scenarios.

• Supported Tier-1 customers including SK Telecom, Clearwire, and Sprint PCS. Project Manager – Network Deployment (2013 – 2016)

• Managed Sprint Network Vision rollout from Samsung HQ ($6B, 5-year program).

• Oversaw deployment schedules, staffing, vendor contracts, and technical quality across nationwide sites.

• Acted as technical authority to resolve deployment and integration challenges. Principal Engineer – Network Maintenance (2016 – 2018)

• Technical lead for commercial network monitoring and optimization.

• Led troubleshooting of customer-impacting issues and development of custom software patches.

• Supported major operators including Sprint/T-Mobile (US) and Reliance Jio (India). Education

BACHELOR OF SCIENCE IN ELECTRICAL ENGINEERING

KOREA UNIVERSITY, SEOUL, SOUTH KOREA

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Certification

Project Management Professional (PMP) – PMI

Credential ID: 1935908 Active since June 2016

Language

Bilingual in English and Korean

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