Yes you can. He can make you a Site admin as interactor. You may not have the rights system admin has but you will be able to run the batch files.
The bigger question is what are you trying to do with tabcmd? Commands like "get" do not need admin access as they are based upon the permissions your credentials carry (i.e. you will not be able to get workbooks you do not have permission to see). Other commands such as scheduling tasks will require admin access.