Moretti was a Colonel of the United States Armed Forces.
The Colonel initiated a research program for new plasma rifles to replace the aging Winchester P94 plasma rifle. RobCo Industries won the bid and cooperated with the colonel in creating a prototype quantum plasma modulation matter injection rifle at the newly acquired REPCONN Aerospace facilities and later mass production of the rifle (although it never reached full scale).
Moretti is mentioned only in Fallout: New Vegas.
Behind the scenes
A "Colonel Moretti" served as the primary antagonist in Give Me Liberty, one of Frank Miller's self-owned comic book series. Hard Boiled, his other series, was the basis for several themes in the original Fallout.