I would like to post a job application to the Nice Côte d'Azur Chamber of Commerce and Industry. To whom should I address my letter?

You can submit your job application (CV with photo and covering letter) to:

CCINCA BP 3331
Direction des Ressources Humaines
Aéroport Nice Côte d'Azur
06206 Nice Cedex 3

I'm interested in becoming an Air Hostess/Steward. To whom should I submit my application?

Each airline recruits its own cabin crew (Air Hostesses, Stewards, Check-in Agents, Supervisors, etc.). You should send an application to each of the airlines that interest you.

I'm interested in a job as a luggage-handler. To whom should I submit my application?

Airport Assistants are responsible for the recruitment of luggage-handlers, traffic agents and operations officers.... You should send an application to each of the Airport Assistants that interest you.

Does the Nice Côte d'Azur Chamber of Commerce and Industry recruit seasonal workers?

Yes, indeed. Each year, the CCI launches a recruitment campaign for seasonal workers. The season commences in April and ends in October. Applications must be sent to the CCI as early as January or February, and candidates must be available for the whole season.
The vacancies are in the operations department (information hostesses, car-park attendants, etc.). These jobs function in rotating shifts, 7 days a week, and call for fluent English plus another foreign language.