Admin Level - Webmaster and Above
From the left navigation menu, click Events & Competition > Events.
To the right of the event, click the green Job Signup button.
Click Find Workers - This will show all active accounts.
Use the filters to find the necessary information:
Date Range of Jobs/Slots -- relates to the past and future jobs information
Has Job -- Yes or No
Click on the Account to move directly into signing this account up for a specific job.
You can send a custom email to accounts by clicking the check box next to the Account Name column or by desired names and clicking the Email button.