To invite a contractor to Oyster, first you need to complete the new hire form, which you can access through menu on your Oyster dashboard by going to People > Hire > Start hiring today.
Once you have completed the new hire form, you will land on the status page. Here you will see a "Complete" tag under Step 1.
On Step 2, you can review the contract.
On Step 3, you can invite the contractor to Oyster by clicking on the "Send invite" button.