If you have a user account for a previous company which you require access to, you will need to link your accounts via the employee portal. Follow these steps:
Log into the employee portal for your previous company.
In the top right, click on your name.
Click Account Security.
Under the Linked Accounts section, click Link an account.
Enter the username and password credentials for your new account.
Click Link Account.
Your accounts will now be linked and you will be able to access your previous and current company via the employee portal.
Note: If you log into the parent account, you will be able to see all of your linked accounts. However, if you log into your non-parent account, you will not be able to see any other linked accounts.