Aye, we are indeed hiring. However, keep in mind that any player made mech should also be a 'civilian' grade machine- it can be modified and upgraded to be a effective fighting machine, but it cannot have been created for the explicit purpose of fighting wars.(unless it was designed for policing) 

Example would be my characters machine. It is clearly a fighting machine. It is meant to shoot shit. But it's base model originated as a civilian recreation machine.