Career section how to add an image to the background in the career section page?

Summary

Career section how to add an image to the background in the career section page?

Content

Hello,

As a part of the career section formatting in Taleo,we would like to have for all the career section pages a background with the company logo- an image 
as a part of the background . 
see attached file for a example please for the picture we wish to have at the background .

How can this be implemented ? i tried to apply it by using a Career section - Theme but not sure.

Thanks,
Revital