All are engineering. All are exciting. Engineers use mathematics and it should be possible to work out how many combinations there are of tasks, projects and employers listed above. You will find that there are over 3,000 combinations and the list is not complete. You can be sure that one or more of these combinations will suit your particular interests and skills.
Engineering also provides an exellent general education.
When you graduate you may choose to practise engineering or you may use your knowledge as a sound basis for a career in marketing, teaching or perhaps other jobs where technical knowledge and problem sovling skills are assets. The best way to find out is to ask them. Here is what several Monash graduates are doing soon after graduation. My degree enabled me to get a responsible and stimulation job designing automotive machinery. I was attracted by design and mechanical engineering.