Advantages and disadvantages of being a non-native English speaker teacher (NNEST). How often do you think that teachers can change the world? Take one minute and think. When I entered this English program, I had classes with someone who teaches me the importance of the educational field and how you can impact students' lives. Perhaps, you will not change the world, but you can change a life and it is almost the same. My program is about learning English as a second language. I will be an English teacher, specifically a non- native English speaker teacher NNEST. Do you know the meaning of a non- native English speaker teacher? According to the Oxford University Press (2014), a non- native speaker is someone who is not native of a particular place, someone who has not spoken the language from his earliest childhood. In this particular situation, Non- native English speaker teachers are people who decided to learn a second language, and they have studied the language, the culture and the origins of a particular place around the world. Ahmar Mahboob in his book "The NNEST Lens: Non Native English Speakers in TESOL" describes NNEST in three main terms "multilingulism", "Multiculturalism" and "Multinationalism", they are multilingual due to the fact that they do not only speak English but they also speak their mother tongue language. In addition, they own a multicultural and multinational view of the world, which represents the fact of coming from different regions, countries and also representing different realities and showing their own origins at the same time. For instance, a Chinese person who learnt English as a second language and now is working as an educator in Chile owns a different background from someone who belongs to Chile. The cultures, the language, the belief, the origins they have are different from what we have here in our country and this person has the challenge to learn about our country (Mahboob, 2010).