Harold Malmgren was presidential advisor for JFK at the time, and he was in charge of White House efforts around this Bluegill Triple Prime Test.
So given that Harold Malmgren was in charge of the nuclear test for the White House, he decided to scope things out with Lawrence Preston Geiss.
According to Malmgren, Geiss was directly involved in reverse engineering recovered craft in this exact period, so Malmgren went to go meet Geiss in New Mexico.
And according to Malmgren's tweets, Geiss was directly involved in reverse engineering recovered craft in this exact period.