He is a young, slovenly geek with an extreme affinity for technology. Working for the Hubologists, but not quite following their teachings - he provides them with his skills in exchange for a hefty salary and some action from the ladies from time to time.
A testament to his talent is the nuclear reactor installed on board the USS Quetzel, as well as a hardening process for power armor that he developed on his own.
Despite being the Hubologists' main scientist, Crockett is not that endeared to the cult. If the Chosen One decides to kill the AHS-9 for Ken Lee, and the Shi, Crockett will not turn hostile. He will still offer the option to harden armor, even, once the conflict is over.
Get some hardened power armor from Crockett: Crockett will harden powered armor for $10000 per piece, but only has enough materials to perform the process twice. The money will remain on his body, so it can be stolen back or taken from his corpse if one wishes.