The admission came after a job listing on the SpaceX website for an "Offshore Operations Engineer" that would work with a team engineers to "design and build an operational offshore rocket launch facility".
Starship is being referred by SpaceX as its next-generation transportation system that can take humans to Mars and other destinations in space.
SpaceX's floating rocket launch facilities seem to be designed around the company's reusable Starship rockets.
In November, Musk tweeted that "most Starship spaceports will probably need to be [about] 20 miles offshore for acceptable noise levels, especially for frequent daily flights, as would occur for point to point flights on Earth".
The job posting for an Offshore Operations Engineer does not provide a date for when it was first published.More news: Macron to discuss Brexit with Johnson on London visit
The job location has been designated in Brownsville, Texas which is close to Musk's SpaceX's testing site in Boca Chia.
"Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars".
Musk also said that the floating spaceports would not affect people living on land.
He added the platforms "need to be far enough away so as not to bother heavily populated areas".
SpaceX continues to work on future Moon and Mars missions after the first manned space flight.More news: Jets' Jamal Adams requests permission to seek trade
Well, if you've only got 30 years, you better start hiring spaceport builders stat.
Musk also revealed that previous year he had told his SpaceX staff that building a Starship spacecraft is the top priority for the company.
Space.com reported that in a company email, Musk urged SpaceX employees to accelerate progress on Starship "dramatically and immediately".
This would be composed of Starship and the Super Heavy rocket booster. On June 15, SpaceX pressure-tested a Starship propellant tank to destruction, in a trial created to inform future designs of the spacecraft.
Musk quickly responded to news of the explosion.
After a few failures, the company's Starship SN4 prototype was able to clear a major cryogenic pressure test in April-end and is now moving towards short-hop flights, which will pave the way for initial orbital test flights in the coming months.More news: Premier League returns to action with two matches