Facility management is an interdisciplinary field primarily devoted to the maintenance and care of commercial or institutional buildings, such as hospitals, clinics, hotels, resorts, schools, office complexes, sports arenas or convention centers. Duties may include the care of air conditioning, electric power, plumbing and lighting systems; cleaning; decoration; groundskeeping and security. Some or all of these duties can be assisted by computer programs. These duties can be thought of as non-core or support services, because they are not the primary business (taken in the broadest sense of the word) of the owner organization.

It is the role of the facility management function (whether it is a separate department or small team) to coordinate and oversee the safe, secure, and environmentally-sound operations and maintenance of these assets in a cost effective manner aimed at long-term preservation of the asset value, and also other janitorial duties such as making sure the environment is properly cleaned and sanitized for its tenants.