In order to add Personnel members to your Work Orders as a Sales Representative you need to make sure this setting is enabled for each of your team members who function as a sales representative within your business.
To do this first go to your Personnel page in ServiceBridge
In the Personnel section click on the user you wish to designate as a Sales Rep for your account.
In this example we will make Barry a sales rep.
Go down to Payroll Setup in the Personnel record and click on Edit.
Make sure 'Is Sales Representative' = Yes and click save.
Now you will be able to select this Personnel from the Sales Rep dropdown whenever you create a new Work Order in ServiceBridge.