"Submit yourselves therefore to God; resist the devil, and he will flee…"

"The unwanted piece of the UFO puzzle" best sums the investigative work of Joe Jordan. He is President and co-founder of CE-4 (Close Encounters of the Fourth kind), the investigative and counselling arm of Alien Resistance.

An addendum on his site says: He is also MUFON (Mutual UFO Network) State Section Director and Field Investigator for Brevard County, Florida, home of Kennedy Space Center. Joe works for Sea Ray Boats in Product Development & Engineering in Merritt Island, Florida.

His line of investigation has the peculiarity of not just being solidly anti-fringe (in the sense of discrediting the notion of flying beings from outer space who have super intelligence) but of also being solidly anti-speculative about those same "space men".

That is to say, he, and the others he works with, are quite willing to believe in peoples' testimonies about being abducted by aliens. They differ though, in what the nature is of the abductors, and where they come from, and what their intentions are.

What is his specific area of enquiry? He has investigated over 300 cases of abduction/encounters; terrifying and paralyzing abductions/encounters. What sets him apart from other investigators (unbelieving scientific speculative types on one hand, and conspiracy theory fringe believers on the other) is that the subjects in his 300 plus cases were able to stop their abductions/encounters, as they were happening, by calling on the name of Jesus.

You can read an article on him here.