For nearly 7 years, I was living in South Korea, where I was working as an English teacher. Because of the nature of those jobs, I had to use Korean quite often in my work days there. I have also used Korean quite extensively in my private time over the past 15 years, as I married a Korean woman and have frequently taken on freelance Korean-English projects in that time. While living in South Korea, I took the TOPIK test and passed the Intermediate test. So my level would best be estimated to be Low Advanced.