Bob Lazar sparked an alien life frenzy in 1989, when, with the help of journalist George Knapp, he released his story to the world.
The scientific equipment supplier is responsible for bringing the secret test site Area 51 to the public’s attention.
Bob revealed how he worked at a site known as S-4 – which, he claims, is an auxiliary facility at the secretive site.
And now he has spilt the beans on exactly what he says went down in there.
“His job was to try and make a system that was the same”
For the past few years, he has let investigative filmmaker Jeremy Corbell into his home and life, to tell the full story in a documentary.
And Jeremy, who runs the website Extraordinary Beliefs, told Daily Star Online exclusively: “This is the biggest UFO story of all time.
“Bob says he worked at Area 51 in 1959 on reverse-engineering.
“This is the taking apart of alien spacecraft in an attempt to replicate their materials with the ones we have.
“The proportioning system in these jets was element 115, which was used to generate gravity waves.
“And his job was to try and make a system that was the same.”
Bob has received criticism over his case, after holes appeared in his story throughout the years.
He claims to hold degrees from the Massachusetts Institute of Technology and the California Institute of Technology.
But investigations into his background could not find any records of him ever having attended either institution.
Jeremy revealed there is one thing that makes it hard for him to rule out Bob’s story.
“If Bob Lazar is telling the truth, the implications are huge,” he added.
“He is telling us that the US government has studied alien spacecraft for the last 30 years.
“But what’s more shocking is the craft involved in the New York Times “Tic Tac” UFO case used a gravitational system.
“And it seems to be exactly the same as what Bob described.”
In December 2017, bombshell video footage emerged of US Navy jets encountering a “rotating UFO” as part of a secret government project.
The Advanced Aerospace Threat Identification Program – as it was known – had a budget of $22million (£16.5million) allocated to it annually by the Defense Department.
“Naturally, the Pentagon’s secret UFO project and Area 51 link in together,” Jeremy continued.
“We are talking about a government that has been interested in and studying and possibly reverse engineering these crafts for years.
“This is not just a US issue though.
“This is a worldwide problem that other governments are aware of, too.”
Bob Lazar: Area 51 & Flying Saucers comes out on December 3 on iTunes and Vimeo.