My first question is: "Why do you want to get a PhD?". It takes a lot of money and a lot of time. Many people get there and find that they can't to what they thought they wanted to do. My wife has a counseling practice, and too often she has had to turn away PhD Psychologists, because they never stopped along the way to determine what would be most helpful to allow them to do what they really wanted to do.
Here is some helpful information about engineering: http://www.engineergirl.org/
Here is some helpful information about becoming involved in therapy and the application of psychology: http://www.huffingtonpost.com/marjorie-hansen-shaevitz/post_9154_b_6865002.html
Best of luck! Please keep me informed. I would like to follow your progress!