English Language Teacher at English Time
Would it possible for you to study abroad for a semester? Or volunteer abroad during a summer break? You can also look into participating in a Work for Travel Program (this allows you to work abroad in the summer and you get to meet all sorts of people of various cultural backgrounds). I think that have experience working or volunteering or studying abroad can definitely make your CV more competitive. Go to your college career center to ask about possible internships do to during the school year related to your desire to apply for a future career in the UN. Volunteer work during the semester relevant to your desired future career also boosts exposure. Or look to a professor who can serve as a possible mentor.