You look like the perfect recruit for the 'Best Airline in the World'.
With all the resources of the Interweb at your disposal, you choose to ask for the postal address of your future employer on Pprune!
Anyway - here we go :-
Cathay Pacific Airways
Janitor Recruitment Department
Hong Kong Airport
Hong Kong
Good luck - special attention required on the 3rd Floor. Bad smells coming from up there.