Once you finish a diploma, you might be able to apply for Aerospace Engineering, depending on the institution's admission requirements. Most universities or colleges ask for students to finish a bachelor's degree, but some institutions accept diploma holders and let them continue a degree in Aerospace Engineering with lateral entry programs. These programs usually enable you to enter the second year of a Bachelor's degree in Engineering or Technology directly.
Apart from educational requirements, you will also need to verify if the diploma that you have pursued is applicable for the course. For example, if your diploma is in Aerospace Engineering or its related field, it may prove to be an excellent foundation for Aerospace Engineering. Additionally, the universities might have entrance exams or other qualifications for admission. It's advisable to search for individual universities or institutes providing Aerospace Engineering so that you are able to satisfy their own particular requirements for lateral entry or other routes following your diploma.