The Police Series, series code 0083, is the federal job family for police work. People in these jobs keep the peace, try to prevent crime, find crime that has occurred, investigate it, and arrest or otherwise take violators into custody. Some jobs in the series involve supervising that work rather than doing it directly.
Besides enforcement duties, the work includes giving help to citizens in emergency situations. Protecting their civil rights is part of that assistance.
The overall purpose of police work in this series is to make sure that laws and rules are being followed. That covers federal laws, state laws, and county and city laws and ordinances, along with the rules and regulations an employing agency sets for law enforcement work.