There are two ways to do this: 1) By experience:
Working at different client sites or companies and 2) By training:
Getting trained on a plethora of PeopleSoft products by PeopleSoft
professionals. PeopleSoft is starting to provide certifications for user
but in our opinion, the horse has already bolted out of the barn. At the
end of the day, experience is king. Certifications without experience =
probably no employment. If you are just getting out of college and you'd
like to get into PeopleSoft, your best hope is to join a consulting firm
and try to get on a PeopleSoft project. That way, you can get valuable
hands on experience that will get you started. Also, in a firm, they
will probably pay for your training (pretty expensive). If you are an IT
professional and would like to get into PeopleSoft, the advice above
still applies to you but I would add that in your case (depending on the
type and amount of IT experience you have), training and certifications
may be helpful.