A doorman is a person who works as an attendant at the entrance to a building, such as an apartment house or hotel. Their primary responsibility is to greet and welcome guests, control access by checking identification, and assist with luggage or other belongings. They may also be responsible for maintaining security measures, such as monitoring surveillance cameras or patrolling the premises. In some cases, doormen may also provide additional services, like helping residents with their packages or providing directions to visitors.