United States Service Engineer
Resume:
Andy YOON
RF Service Engineer IV @Ericsson
Chantilly, Virginia, United States
********@*****.***
SUMMARY
A self-motivated wireless RAN engineer with a strong sense of ownership and accountability to provide high-quality products, has more than 20 years of solid experience in the wireless telecom industry. Possess knowledge and experience in various integration testing, troubleshooting, KPI analysis, and deployment rollout throughout the product lifecycle.
- Protocol: 2G/3G/4G/5G, TCP/IP
- Architecture: Ericsson and Samsung RAN, Open RAN
- Tools: XCAL, Spectrum analyzer, Wireshark, JIRA
- Major: Testing, Inegration, Optimization
WORK EXPERIENCE
September 2022-Current
RF Service Engineer IV
Ericsson
Reston, Virginia, United States
I have been working to perform T-mobile lab validation LTE and 5G SA/NSA in the lab to validate software quality with regression and new feature cases(voice and data traffic, handover, link budget). Also I work for KPI monitoring and troubleshooting issues from the T-mobile's field sites with analyzing logs. December 2021-Current
Sr. 5G RAN Engineer
Deepsig
Arlington, Virginia, United States
As the company proceeds development with focusing on UL quality enhancement under O-RAN structure (Intel hardware
+ Radisys software + Foxconn RU), my role is to design 5G O-RAN network in the lab, operate, and troubleshoot in order to find improvement 5G PHY layer software based on 5G layer software + Machine learning. January 2019-November 2021
Principal Engineer
Accuver
Reston, Virginia, United States
VA
Accuver is a company which has been providing 4G/5G testing tools like XCAL/XCAP in telecom area and my role was to End to End support T-Mobile to operate an automatic testing tool on site as well as remotely. My work was to design and operate the automation testing tool in T-Mobile's lab, to verify eNB/gNB vendor's software and troubleshoot issues. For example, T-mobile engineers requested me to operate the automatic tool when new 4G/5G eNB/gNB software loaded, I built up test scripts in the tool regarding test cases required and test environment. I operated the tool, found test results, and troubleshoot if I got any unexpected result comparing standard KPIs. During troubleshooting I am checking where the issue is happening based on the air interface messages between gNB and UE. The test cases T-Mobile engineers used consists of basic VoLTE/VoNR, DL/UL throughput, handover, and so on. March 2001-December 2018
Principal Engineer
Samsung Electronics America, Inc.
Suwon-si, South Korea
1.Wireless Telecommunication Principal Engineer (02/2016 – 12/2018) Working as LTE project leader, I was managing maintenance projects for both JIO in India and Sprint PCS in U.S major service provider with below activities.
Monitor KPI trends in commercial sites (Coverage, Capacity, Availability, and other issue events on service issues). When faced issues, I was analyzing logs and coworking to build patches, and applied at commercial sites. Project leader of Massive MIMO field trial for JIO in Mumbai India, 2017. I selected candidates out of commercial sites, replaced old RRH with M-MIMO unit, and prepare pre/post KPI trend. Build up feature roadmaps (high level feature design) regarding requirements from customers. Project Coordination of wireless telecom products based upon R&D process (Controls of delivery schedule, costs, headcounts for commercial project)
2.Deployment and Maintenance Senior Manager (03/2013 – 01/2016) I was working as a Senior manager to support deployment and maintenance services of Sprint NV (Network Vision) project which was to replace 2G/3G RAN with LTE RAN DU/RRH. I was dispatched to Samsung local branch, VA and coworking with project managers and engineers on following activities. My report went to executive level of headquarter in Korea.
Monitor forecast and actuals of deployment steps, and analysis of issues Make a MOP (Method of Procedure) and training field engineers to achieve a site acceptance Professional service proposal based upon performance analysis in customer's commercial network Analyzing headcount for engineering service and reporting to executives. Risk management for vendor program, internal headcount, and supply-chain /logistics Material planning and logistics based upon deployment schedule and procurement 3.S/W quality assurance Senor Test Engineer (03/2001 – 02/2013) As a software assurance engineer for CDMA, WiMAX and TDD-LTE RAN system, I was responsible for test, function and qualify of RAN S/W Package in Lab and deliver to customer. Also troubleshooting issues in commercial sites with below activities
Discussion of feature description and priority regarding customer’s demand Testing, troubleshooting, bug fixing for new features and regression in internal LAB Single/Multi data call testing with simulators (MOS, E500, and other simulators) and DM tool Test Plan/Case build, environment setup, testing/troubleshooting, and reporting a result. Technical support to customer’s validation test in customer’s LAB with business trip Support for S/W package application into commercial network with pre-checking, applying, post-audit History of past customers is below
CDMA 1X and EVDO systems with SK Telecom (No.1 provider in South Korea) 2001 ~ 2005 M-WiMAX system with KT (No.2 provider in South Korea) 2005 ~ 2006 M-WiMAX system with Sprint PCS/CLEARWIRE in US 2006 ~ 2012 FDD/TD-LTE system with Sprint PCS/CLEARWIRE in US 2010 ~ 2013 EDUCATION
-2001
BS in electrical engineering
Korea University
Seoul, South Korea
Korea University, BS in electrical engineering - 2001 Seoul, South Korea
• electrical engineering
SKILLS
LTE 5G System Integration (SI) Product Testing Optimization Algorithm CERTIFICATIONS
PMP
Number: 1935908
Credential holder since: 14 Jun 2016
Credential valid through: 13 Jun 2022
LANGUAGES
Korean - Fluent
WORK AUTHORIZATION
I am authorized to work in the following countries:
• United States
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