A work order can be created and will initially be considered Not Assigned.
At any time, including during the initial creation of a work order, assigning it is accomplished by simply selecting the available Employee or Contractor as shown below.
Special Note: Scheduling sub-contractors can have various legal ramifications and the procedure may vary from state to state. MyOnlineToolbox currently addresses the issue where you can set up a sub-contractor as an employee simply to note that someone else intends to do something at a scheduled time, but you are not telling them what time to do it as if you were scheduling an employee.
There are various areas that this assignment may be seen, and by selecting the Work Order tab within the job is one place you may see the assignment as shown below.