If you do 2 pages, I would try to make the one page stand-alone – so if it ends up in the hands of someone who only wants to deal with one page, they get all the most important stuff from that.
The second page I would add more details, but stuff that would not be so significant to be thrown in the trash.
For example, you say you have a lot of qualifications, but if those certificates are implied by previous positions you have held (this is just an example, may not be true for you), then maybe list the certificates in more detail on the second page where they can double check that you have what they're looking for.
What industry are you looking in, roughly?