The second does look feminine, but that makes me think a secretary may have signed it for him. Not sure about military practice in such matters, but for what it's worth, during the several years I worked as a secretary, I frequently signed letters at my boss's request.
The problem with the secretary hypothesis is that these are supposedly CYA memos destined solely for Killian's "personal file." It's hard to imagine he would have his secretary, after typing such a document, proceed to SIGN it for him. It's somewhat surprising that he would feel the need to sign the document himself.
Which raises another point: what good is a CYA document that doesn't actually go into the file to which it pertains? How does such a document fufill its express purpose of covering Killian's ass if it is not even in the file to be found in the first place?
I suppose it's always possible. I'm not sure how that worked in the military in 1972-1973; more specifically the Air National Guard.