Do i qualify for the PMP certification or the CAPM?

I have over 17 years of IT Experience. I have a Bachelors Degree and MBA, I also have the following IT Certifications A+, Network+, Linux+, RHCSA, VCP, MCSA, CISSP. 

Over the last 5 years i have been a senior IT Engineer that has worked on all sorts of IT Projects. With these projects i was not the lead of all of them but i was 

a technical resource that was needed to complete the project. I have heard seen conflicting information about the requirements....for the PMP do i need to be the lead

for the projects for 3 years before i can take the exam or can i just be one of the resources involved in completing the project?