M.S

International students are not allowed to part time courses.

International students will not be accepted for part time courses. You have to take up full time course to get the student visa to enter into Singapore. You may not have aerospace or aeronautical courses in Singapore. you can try in Ireland where you will get up to 50% schorlaship in Limerick University

Germany or USA are the best ones

Here are the ones:
1. TU CLAUSTHAL
2. TU BRAUENSCHWEIG
3. RWTH AACHEN
4. MAGDERBURG UNIVERSITY
5. Lbeck University of Applied Sciences

British Columbia and Ontario are supposedly the top provinces for students and immediate employability irrespective of the subject.

Hi, check the top universities of Singapore NUS and NTU. They are selective universities and usually higher grades are preferred. Scholarships again are on merit basis and depends on an individual application package. Please visit the websites and prepare for your application according to their requirements.

Hi
Check your eligibility here as most universities require work experience, Based on your points , you can shortlist the universities you wish to apply.
http://www.msinus.com/content/profile-evaluation-ms-us-261/

it is not compulsory to do ms or mba after btech but if u'l do it den dat will make alot of difference. i would advice you to do either of them.
all the best

Om, you can do part time MBA or distance learning MBA along with your job. However, a part-time or correspondence PG course cannot match the value of a Full-time course. So take your decision keeping this in mind