Initial steps
Go to Structure > Block layout > Add custom block.
Choose Jobs block
Add a Block description to identify your block in the admin.
Select your college from the Business Unit dropdown.
Select the job categories to be included in this list and click Save.
Configure your new block by adding a title which you can choose to show before the list with the "Display title" checkbox.
In "Visibility" choose where you would like to make this block available for placement, (usually Restricted to certain pages and providing a path).
Select the Region in which to place the block (typically "Content").