Now I'm working in a roll as Senior software engineer, I'm mainly programming in Java for almost 5 years. What I have developed is all about messaging module, something like a message bridge between two difference systems. Recently I have a thought that I'd like to change my career to be a sale engineer, I think that sale engineer will deal with many new technologies and many people which might be fun. therefor I would like to have some information about what kind of works sale engineers really do, and how to prepare to be an sale engineer.