he former military man, who is said to have seen 20 years of service, has allegedly revealed the startling story to US conspiracy theorist investigative journalist Linda Moulton Howe.
Mrs Howe, 75, from Albuquerque, New Mexico, who has been awarded for her paranormal research through website Earthfiles.com, says she was contacted several times by the whistleblower she has only been referred to as Brian.
In a series of videos released on YouTube, Mrs Howe is heard interviewing Brian about what he allegedly saw.
Brian, 59, who alleges to be a former retired US Navy petty officer first class flight engineer in a squadron called Antarctic Development Squadron Six, claimed to have been part of a crew that flew through a no fly zone above Antarctica, and saw UFOs, aliens, and a giant entrance hole to an alien base.
He was said to be stationed there between 1983 to 1997, when he retired, and on several occasions saw "aerial silver discs" flying over the Transantarctic Mountains.
In the videos, he claimed there is a top-secret collaboration between humans and aliens, with Antarctica a major research ground for the projects.
Scientists believe a massive object that could change our understanding of history is hidden beneath the Antarctic ice.
The huge and mysterious anomaly is thought to be lurking beneath the frozen wasteland of an area called Wilkes Land. The area is 151 miles across and has a minimum depth of about 2,700 feet.
However, the wilder minds of the internet have come up with their own theories, with some conspiracy theorists claiming it could be a massive UFO base or a portal to a mysterious underworld called the Hollow Earth.
This Wilkes Land gravity anomaly was first uncovered in 2006, when NASA satellites spotted gravitational changes which indicated the presence of a huge object sitting in the middle of a 300-mile-wide impact crater.