This is not just about aircraft design and development, but includes a lot of elements including fluid mechanics, control engineering, solid mechanics, noise control, risk and reliability, flight test, and much more. Similar to the study of the field, you can work in a wide range of fields, sectors relative to aircraft maintenance, design and development, aerospace, in public and private companies. The college you are doing your study from matters a lot, as quality study, practical exposure goes a long way in preparing you for your career. This is not like other engineering colleges. And therefore doing your study from a college which is specifically for this field is a better option than doing from a college where there are multiple engineering trades. While you can opt for a diploma in aeronautical engineering, doing bachelor is a better option as it provides professional growth chances at a higher level.