I second this. You can take the PMP exam. But to get actual certification, you need project management experience. When I was taking the class, they were pretty liberal with what counted as project management experience, as long as you frame it the right way. Courses run from probably $600 or so (maybe more, I took mine a long time ago) up to close to $2000, plus like $400 for the test ($555 for non members of PMI). Here's a link to Rita Mulcahy's test prep. When I was taking it, she was generally recognized as the best instruction/prep for the exam.