Working with corporate clients is about how you can help the client. It really has very little to do with your photography. Ok, put away the pitchforks and stop screaming about quality photography for a moment and listen. Yes, you need to be able to produce quality photographs. However, there are a thousand other guys (and gals) out there who can do the exact same thing. You need to be a salesman and customer service representative when it comes to corporate clients. Figure out how to make your customer look good and they are happy.
Stanley Leary has a great video interview from Greg Thompson with Chick-fil-A about what he looks for in a corporate photographer. Watch and learn!