Joined a major foreign-affiliated IT company in 1983. He has been engaged in customer support for about 10 years and marketing work for more than 8 years. After that, he experienced marketing, market research, and business development at IT-related companies such as Korean software ventures, foreign-affiliated IT market research companies, and domestic telecommunications carrier research subsidiaries. He has a lot of experience in building relationships between overseas divisions and domestic stakeholders. In March 2009, he became independent as a professional technical service business after contracting the technology and sales promotion management business of Bluetooth SIG.