What type of bicycle parking rack should my company install?
As someone who rides their bike everywhere I have experienced a great many types of bike rack. In my opinion the best choice is a Sheffield Stand.




  Image Copyright David Wright CC BY-SA 2.0
  (http://creativecommons.org/licenses/by-sa/2.0), via Wikimedia Commons


They are cheap, simple and readily available to purchase. When installing them make sure they are far enough apart so that riders have enough room to comfortably part and lock their bike.

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As others have said, avoid anything that holds the wheels. These provide poor locking options and don't easily accommodate bikes with different sizes of tyre. They can also damage rims and spokes.