Not, that I have held a corporate pilot job yet, but I have found that networking is the best thing to do. Ex; I had heard that Raytheon corp had a fleet of jets and king airs. So I called raytheon and after a few phone calls I ended up speaking to the chief pilot, went down for an interview, never got hired because of my hours but, made a very good contact for the future. I was under the impression they had some king airs too but it was just a Hawker 1000 and a Challenger 604 so I wasn't even close to qualifying. Also
www.findapilot.com is good for some corporate position