You need to have good mathematical and logical skills. You also need to be good at organising. You will be working in teams of cross-sectional skills and as such you must be able to get on well with people at all levels. You should be able to keep calm under pressure and be a problem solver. You should also like working with tools, drawing complex sketches and thinking up forms and structures.
This is a field where you are required to constantly update yourself with the latest innovations and technologies. So be prepared to read a lot. The ability to express one's ideas clearly to others comes in handy too. You should also be creative and analytical with an eye for detail.