Unless changed in Step 1 while Adding a New Contact, a Contact Record's Record Owner is <Everyone> by default.
Navigate to the Contact Record and select the Contact Info tab. The Record Owner information is displayed above the Record's Photo field.
If set to a value other than Everyone, a user must be a member of the selected Employee Group to have access to this Contact.
To change a Record's Record Owner, click Edit Contact Info.
The Edit Contact Information window opens. Click the drop-down next to Record Owner.
Select an Employee Group from the available list and Close this window.