Coordinate system change

Hi everyone,

I'm new to OCC, and I am trying to figure something out..

The goal of my application is, to import a .step file and show it in the rendering module. Got the framework for that working. :)
However, the request was made to be able to change the coordinate system before it goes into the system. For instance, load the step file and change the imported model from a Z up to a Y up (for example). I have seen other applications which also allow this change, however I am a bit confused on how to get this working in OCC.

Can anyone help me with this?

Thanks in advance!