Security workers occupy an array of positions both public and private sectors such as various types of police officers, private security guards, corrections guards, animal control officers, bridge and lock tenders, etc. They must be observant, willing to take direction and follow policies and procedures, and able to communicate effectively with the public as well as their supervisors and co-workers. Police and other public officers must be able to enforce the law; all security workers must be able to respond to emergencies, protect people and property, and give aid as needed.