The easiest way to find the right person is to call and ask. Even better if you can find out who his/her boss is and then mention to your target that so-and-so

The easiest way to find the right person is to call and ask. Even better if you can find out who his/her boss is and then mention to your target that so-and-so told me I should contact you about a position.....see what I did there :-)