To change or add a logo on a live job post:
1. Go to the Jobs panel located in the side navigation.
2. Find the job with the logo you wish to switch out.
3. Click the 3 horizontal dots on the right under the Job Title and select Edit Job. 
4. To the right of the Business Location fields in the job post form, select Use Another Logo to update an existing logo or Add Logo to upload a new logo.
5. If you've uploaded multiple logos in the past, they will be displayed after selecting Use Another Logo. You can select from previously uploaded options, or upload a new logo by selecting the Plus symbol.
6. After selecting the correct logo, go to the bottom of the page and click Review Your Job.
7. Your logo is now updated. Click Save Changes and you're all set.