Enforcers work with the Sergeant at Arms, and in a manner of speaking - are his squad. They carry out his orders - orders that come from the President. Their list of duties are:
Help the Sergeant at Arms prepare and survey the clubhouse for Security faults
Help set up the Clubhouse with Security (eg: Installing CCTV)
Although the entire club is called to arms if required, Enforcers are the main fighting force.
Carry out required duties when the Sergeant is unavailable to do so.