I am a citizen, and a engineer can I work two fulltime jobs together?

Answer 1

Assuming you are referring to two different jobs in two different companies, I don't see why not. However, as an engineer, you should be making ample money not to have to take a 2nd job. Another thing you need to consider is your health. If you work 2 full time jobs, that's 80 hours a week. There is only 24 hours in a day. 16 of it is spent working. Not much time to relax and regenerate the brain cells, let alone spend any time with family.

Answer 2

In different companys? Asking a question such as this makes me doubt your engineering status.