I am currently pursuing my degree in Mechanical Engineering and planned to work as an engineer for 2 years before applying MBA in Korea, preferably at SNU. Do i need to work in business related field to apply? Also, do i need to know Korean language? Thanks.

Almost all engineering work is in business, but even public sector work can give interesting management experience. The top MBAs in Korea are in English.

Like Duncan said, much of the business in Korea is done in English. However, according to an article on this site, for a foreigner, navigating the culture and the language can present challenges. SNU does offer Korean language classes, though - those could come in handy.

Check out the article here:

http://www.find-mba.com/article/430/a-dragon-unleashed-mba-programs-in-south-korea