Juan, I think I will be able to help you. I have some books with vocabulary related to engineering.
Let me know if you would like to try one of my tutoring classes.
well, as far as im concern being a student there is no TECHNICAL ENGLISH exist in this world. I think you are talking about BUSINESS ENGLISH which is not far different from the common general purpose English.But in Business English we generally are being taught more about ethics and system of an organization and if you are good with English then BUSINESS ENGLISH would not be a PAIN IN NECK.