After that, he went on to reveal that he had come across real evidence of an alien space capsule, noting that he planned to share the findings with the public.
"Something unexplained is always assumed to be a potential threat until we are certain it isn't," Elizondo said at the To The Stars Academy of Arts and Science forum.
Elizondo also said that he's used to being involved in "nuanced programs" surrounding national security, but the topic of "aerial threats" has been the "most interesting effort" for him.
He worked with the Department of Defence for nearly 10 years, addressing the moment he saw recorded evidence that proved UFOs are around and the plan to share the footage.
"We are also planning to provide never-before-released footage from real US Government systems. Not blurry, amateur photos, but real data and real videos," Elizondo said before "inviting" fellow government and defence colleagues to get engaged with their own findings about the phenomenon.