How Can English Help Me in My Future Occupation?

When I was in Brazil, I finished my university in business, and then I started to work in a company. While I was working, I could realize why and how the english will be important in my career. First, because the company that I worked is a multinacional, then is necessary have contact with people from South America, United States and Europe. For example, some information comes from affiliates in other countries, and sometimes is necessary to send information for other countries too. Second, usually a person want to grow in his career, and to do it the English will be essential. I had some bad experience about it, because I had some opportunities that I lost because my English was not like the necessary. Then, this is the reason that I think this language will be important for me.