To make T Shirts using your company logo I recommend using either Customink.com or Rushordertees.com
Both those websites are good to upload your company logo too where you can design your company T Shirts and then have them print them out and send them to you.
I've used both Customink and rushordertees to make company shirts and just shirts in general to advertise other things with.
They've both did a great job and made the shirts really fast and had fast shipping as well.
I highly recommend either of those.