OH WONJOONG
Assistant Manager
Seoul-Si
Summary
Data analytics and ML/AI specialist with 9+ years of experience across diverse industries, including finance, retail, manufacturing, and marketing. Proven track record in end-to-end data projects: data ingestion, data engineering, predictive modeling, and advanced analytics (NLP, deep learning). Skilled in Python, R, SQL, and familiar with cloud services (AWS, etc.), with a strong focus on delivering business insights and solutions. Fluent in English and proficient in Spanish, enabling effective cross-border communication and project collaboration.
Overview
11
11
years of professional experience
14
14
years of post-secondary education
3
3
Languages
Work History
Data Analyst (Assistant Manager)
Lotte Card Co., Ltd.
08.2024 - Current
- M Company Overseas Sales Data Analysis Project: Analyzed re-purchase rates and new user inflow by merchant channel to provide brand-specific insights
- Automated data transmission and validation to supply end-to-end data to external partners
- Collaborated with a Hong Kong-based investment firm to identify market trends and evaluate 500 high-potential local companies
- T Company Merchant Purchase Behavior Analysis: Combined demographic and geographic attributes to generate purchase behavior insights for merchants
- Performed sensitive data preprocessing and engineered synthetic data using deep learning techniques
- Product Data Extraction Algorithm Development: Implemented an algorithm to extract manufacturer, brand, product category, and related information from product names
- Utilized RoBERTa/GPT APIs on both in-house and scraped product data, creating a master product mapping algorithm (planned service launch in Q1 2025)
Senior Data Analyst
LG CNS
03.2021 - 08.2024
- LG Electronics Design Center Analytics Project: Implemented K-Prototypes and Big Five factor analysis for customer segmentation
- Built a recommendation model for product and marketing strategies based on user segments
- Data Governance Team Support: Established new processes and metadata standards for enterprise-wide data management
- Improved transparency and efficiency in data handling across multiple business units
- Search Keyword-Based Data Management Platform (DMP) Development: Classified and tagged customer attributes for online marketing
- Leveraged lookalike modeling to identify potential customers with similar interests
- Online Channel Sales Forecasting: Gathered data from five major e-commerce platforms (Naver Shopping, 11st, Coupang, TMON, Wemakeprice)
- Developed data correction and forecasting algorithms for product sales volume, enabling competitor analysis and market insights
- ChatGPT-Enabled Analytics Projects: Automated product name standardization and category classification
- Analyzed US-based Voice of Customer (VOC) feedback for product improvement and competitive insights
Data Analyst (Assistant Manager)
Exem Co., Ltd.
10.2017 - 03.2021
- Korea Electric Power Corporation (KEPCO) Big Data Integration Project: Contributed to building a unified big data platform and performed advanced analytics on energy consumption data
- Created educational resources for R, SPSS, and Tableau upon client requests
- Samsung C&T Fashion Division – Big Data Projects (Phases 1-3):
- Phase 1: Analyzed sales characteristics per offline store and integrated them with online sales data
- Built a product recommendation system that identified similar items based on store/brand segmentation
- Phase 2: Developed Product Life Cycle (PLC) forecasting model for identifying product entry/exit strategies
- Conducted store-level segmentation in China (north vs
- South) to optimize inventory and marketing efforts
- Performed material defect analysis (VOC) to reduce claims and improve product quality
- Phase 3: Created a brand profit/loss simulation model (worst & best-case scenarios)
- Built algorithms for outlet inventory distribution and reorder product allocations
- Developed an incentive/commission simulation model for store operators, improving partner relationships
Manager
Salted Venture
06.2017 - 09.2017
- Briefly managed overseas marketing efforts, including campaign planning and international partner outreach
Associate
Nielsen Korea
09.2016 - 12.2016
- Supported market research data analysis and consumer insights reporting for global FMCG and retail clients
Marketing Manager
Koreana Viajes (Mexico)
01.2014 - 06.2015
- Tourist Interest Analysis Project: Developed an algorithm to recommend travel packages based on customer reviews, booking data, and travel history
- Implemented a new approach to adjust existing packages with emerging interests (restaurants, hotels, activities)
- Travel Package Optimization: Designed routes for 20 major tourist sites in Mexico using VRP algorithms and cluster analysis (K-modes)
- Recommended alternative destinations with similar attributes for upselling or cross-selling strategies
Education
M.S. in Data Science -
Sungkyunkwan University
Korea, Suwon 08.2019 - 07.2021
B.S. in Economics & Statistics -
Carnegie Mellon University
United States, Pennsylvania 08.2007 - 06.2016
High School Diploma -
Greengates School, Mexico
Mexico, Mexico City 08.2004 - 05.2007
Skills
- Python, R, SQL
Data analysis
Data visualization and presentations
Python programming
Tableau
Skills And Certifications
Python, R, SQL, SAS, AWS (S3), Tableau, SPSS, ChatGPT API
Advanced (OPIC AL), Intermediate (DELE B2)
Completed Army service in South Korea (09/01/09 – 07/01/11)
Additional Information
KRW 91,410,000 (annual), Available to start within 3 weeks of offer confirmation
Core Competencies
Experience with large-scale data analysis in finance, manufacturing, retail, and consumer analytics., Hands-on development of machine learning and deep learning models., Proficient in NLP (natural language processing) and ChatGPT API usage for automation and insight generation., Skilled in data pipelines, ETL processes, and data quality management., Experience in data governance setup and metadata standardization., Strong background in R, Python, and SQL for data manipulation, reporting, and dashboard creation., Development of KPI frameworks, predictive models, and recommendation systems., Led projects for both domestic and global clients, delivering solutions and coordinating across multi-cultural teams., Proven ability to communicate technical insights to stakeholders at all levels., Experience with finance (credit cards, payment services), consumer goods, electronics, public utilities, travel, and e-commerce.
Timeline
Data Analyst (Assistant Manager)
Lotte Card Co., Ltd.
08.2024 - Current
Senior Data Analyst
LG CNS
03.2021 - 08.2024
M.S. in Data Science -
Sungkyunkwan University
08.2019 - 07.2021
Data Analyst (Assistant Manager)
Exem Co., Ltd.
10.2017 - 03.2021
Manager
Salted Venture
06.2017 - 09.2017
Associate
Nielsen Korea
09.2016 - 12.2016
Marketing Manager
Koreana Viajes (Mexico)
01.2014 - 06.2015
B.S. in Economics & Statistics -
Carnegie Mellon University
08.2007 - 06.2016
High School Diploma -
Greengates School, Mexico
08.2004 - 05.2007
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