Study Abroad

For entry to a Masters programme the minimum requirement is normally a 5 year Bachelors degree
The following degrees are considered to fulfill the requirements
A 5 year Bachelors degree major in engineering architecture or similar
A 6 year Bachelors degree Doctor of Dental Medicine, Doctor of Veterinary Medicine Doctor of Optometry
A 4 year Bachelors degree followed by a 4 year Bachelor of Law or a 4 year Doctor of Medicine
A 4 year Bachelors degree followed by a 1 or 2 year Masters degree
A Senior High School Diploma Student Permanent Record year 11 to 12 from the K 12 Curriculum followed by a 4 year Bachelors degreeA 2 or 3 year Associate degree in Pre-Dental studies followed by 4 years of study in Dental Medicine resulting in a Doctor of Dental Medicine also meets the general entry requirement
Meeting the English requirement
You can meet the English requirement
if English was a subject in all upper secondary school years and was the only language of instruction for the Associates or Bachelors degree or English was the Bachelors degree major
if you have studied according to the new K 12 Curriculum
If you are documenting your English based on your upper secondary studies you must provide documentation demonstrating you meet the requirement Please submit your upper secondary documents as indicated for Bachelors level studies You can also demonstrate that you meet the English language requirement through certain university studies or an internationally approved English test.

If you want to be a simultaneous interpreter:
You have to go to a graduate level professional school and do a specific simultaneous interpretation degree. Your choices are the Hankuk University of Foreign Studies, Ewha and Chung-ang. Competition is about 20 to 1 and not all students graduate. Simultaneous interpretation is very difficult between the two languages (more so from Korean to English one reason for example, being that negatives come at the end of sentences in Korean. For example, ' ' becomes 'I don't like apples'. Notice where the negatives (in bold) come in the sentence. If you can do this well though, then congratulations, you're probably set for a high and stable income.
2. If you want to interpret for tourists ( )
This is a matter of getting a qualification by passing 1 written and 1 interview examinations. This is for interpretation for guiding tourists around, and requires knowledge of Korean cities and tourist spots, Korean history, tourism as an industry and tourism law. Level of language required is relatively low, and this is mainly for people whose first language is Korean.
3. If you don't want to do either of the above, amateur interpretation
You can sometimes find interpretation jobs without either of the above, but then it's a matter of you finding it for yourself. Even then, chances are that you'll only land jobs that pay little. To become a part of an interpretation company, you'll need certificates to prove your fluency in both, or that M.A. Degree I mentioned above. I would say the bare minimum would be TOPIK Level 6, if you're a native English speaker. There are many more Korean native speakers who are excellent at English than the other way around, and overall, especially in business, Korean is the language that requires more delicacy in translation (with register, tone, politeness etc. ). If Korean is your second language, then your chances are fairly slim. If neither Korean nor English is your first language, then don't bother. Interpretation (and translation) is the standard go-to part time job for the numerous Korean students who have studied abroad in an English speaking country, so the market, especially at a quasi-professional level, is pretty much saturated.