Time is running very short??? Why do I get the feeling that you are asking us to help with your homework here? I mean, it's hardly difficult to type the word 'cinemtography' into google is it?. I found an official defintions of the term in about 5 seconds that way. And as for fidning work as a special effects person. If you can;t define the role yet I strongly suspect you are trying to do too much too soon.
Apologies if I've misinterpreted this question.