Click on the “Assign Contractor” button on the top right.
Choose the contractor on the popup window that opens up. Select the Contractor and the Office from the list.
If the office of your contractor does not exist or you want to add a new office, click on the “+ New Office” button to add a new one, and it will redirect you to the Contractors > Site > Offices.
Click on “Save” and now you have assigned a contractor to your project.
Note: To add new Contractors this should be done from the Contractor module, in this way it will show up in this list.
To remove a contractor from your projects:
From the list of assigned contractors click on the trash can icon at the far right of the contractor's row three dots.
Click on the “Yes, Delete” button, and you have removed the contractor from your project.