As the name suggests, security work is all about keeping people and/or things safe. Roles vary from providing crowd control services at events through to work as a CCTV operative, checking cameras in shopping centres and similar environments for signs of criminal activity. Security workers may also be employed to provide personal protection (sometimes known as a body guard), ensuring safety at nightclubs or pubs (commonly known as bouncers) or ensuring the safety of building sites, warehouses or other commercial premises. Shift work is common in this industry and anti-social hours are also usual. Full-time work in this area often involves working forty or more hours a week.