• Established and improved ​ETL system ​to deliver ​big data (game logs) ​to the end users using​ Python, Airflow, AWS EMR​, and trained and guided data scientists to use it• Managing ​Airflow, and designed the ​market data ​(Apple store/ Google Play) and ​3rd party data​ (Facebook, Adjust, Singular, etc) ​importers​ for mobile games• Advised engineers and data scientists and designed the system to prepare and comply with ​GDPR​ requests and reached 100% response to the privacy holders• Built the ETL system and scaled it up to millions users for multiple mobile games

A consultant of IT Risk & Assurance at Ernst & Young's Seoul office with responsibility for delivering information security, personal data protection, risk management and compliance related services.Provided a wide array of risk services, including internal control over financial reporting readiness, compliance with internal control, data privacy laws and regulations as well as information security requirements, risk management strategies, implementing management programs relating to enterprise risk management and privacy, data protection and technology risk management.[Privacy and Personal Data Protection related Law]• Established and Improved the Privacy and Data Protection management system for Compliance by analyzing laws and regulations related service with lawyers to the financial holding company and its subsidiary.• Provided consulting services to a national organization to make a privacy law and regulation about cross-border issues, and established guideline of Cross Border Privacy Data Transfer • Performed several engagements which enable multinational business organizations to meet regulatory requirements of Data Protection Act of Korea. [Service Organization Control (SOC) 2, 3 report]• Publish the SOC 2, 3 report Type 2 for the largest internet portal company in Korea, NAVER, for four consecutive years (2013, 2014, 2015, 2016)• Also, for the one of the most used mobile messenger service company, LINE corp., for four consecutive years (2013, 2014, 2015, 2016)[And many other projects on Information Security]• Strengthened the manufacturing company’s Personal Information Management System and helped to acquire a certification which are all the actions that organizations should take to ensure that they do comply with the Data Protection Act of Korea• ITGC Audit• Assessment of IT ability• Performed the Penetration Test on banking company’s website co-operated with EY Singapore

[Engineering Computer programming, Spring 2010 and Spring 2011]• Python, Matlab programming for undergraduate students• Responsible for 1 hour lecture and homework evaluation[Computer Networks, Fall 2010]• Java programming for undergraduate students• Responsible for homework evaluation and supervision [Advanced Computer Networks, Fall 2010 and Fall 2011]• Java, NS2 network protocol simulation for graduate students• Responsible for homework evaluation and supervision of a term project[Wireless Networks, Spring 2011]• Java, NS2 wireless network protocol simulation for graduate students• Responsible supervision of laboratory and term project• Implemented a simple wireless network model for course material