Page 24 - Beginner's Guide to Aviation

Last but not least, we have local key players such as private companies such as ground handling companies that provide services to aircrafts on land as well as the government and cooperate companies operating in the country. This could be specialised branches within the government for transportation, a country’s civil aviation authority, the company that runs the airport and any subsidiaries that the company may own.
Here are some examples of private companies operating in Singapore as well as some other services they provide!
In flight catering
Security
Customer service
Ground handling