He's charged with taking care of the needs of up to 2,600 cruise ship passengers at a time.
That's more people than most hotels on terra firma can hold.
But Mr Dodie Rosacay, 51, who's been at his job for nearly 18 years, takes it in his stride.
"The minute I step on board, the care of the whole ship (in his case, it's the SuperStar Virgo from Star Cruises) becomes my responsibility."
That means managing 750 hospitality crew members in departments like food and beverage, housekeeping, front office and galley operations.
Mr Rosacay says: "Other than being in charge of the entire operations, we also have to be particular about the safety (of everyone) on board."
Guests can became so agitated that some have threatened to jump off the ship, he says.
When you're on a ship thousands of nautical miles away from shore, it's not as easy as calling the police for backup, muses the tanned Mr Rosacay.
The hotel manager says that means they'd have to "quarantine" the passenger in a cabin for his and the crew's safety, without revealing more details.
Security officers are deployed outside the cabin and a surveillance team is also alerted to help monitor the passenger's movements.