California is a good place with your skills. There will be a huge problem in your field though; and that's your ability to get a visa (an H1B is probably what you are looking for) to work in an area that might be high security.

A lot of the jobs in Cal in that line say you have to be an American citizen and becoming one can be very expensive and can take a long time.

If I were you I would consider taking another degree at one of the Universities in LA or SF and use that route to get an I20 (the document issued by Universities so you can get an F1 student visa) and use the time to get a foot in the visa door. After you finish, you can then get what is called Optional Practical Training; a scheme accepted by the government for specially trained University graduates, which allows you to work for a year while trying to get your H1B.

Yep! The States is a maze of documentation!

-David C.