Yes, you can countersign a contract before or after you send it off. **You cannot sign before the client signs if you have marked required fields in the contract** Be sure that if you are going to be countersigning that your template has your signature box marked for YOU.
Before we get into HOW to countersign, make sure that you are set up correctly for countersignatures. In the editing contract mode click your signature box and make sure this check box is check for YOUR signing field.
To countersign, head into the job or lead and under contract click the arrow down and then OPEN.
This will open the contract in a sign-able tab where you can countersign it.