That's post-Korea, that pic. He's got all the Korean War ribbons, and the USAF didn't finalize those ranks until 1956.
Stranger and stranger. E5 is VERY low for that man, in that pic.
Reminds me of my own grandfather. He got married to my grandmother (also a Marine) in 1944, and their wedding pic shows her as an E5 and him as an E2. Which is odd, because he'd joined up before Pearl Harbor and thus should have been at the very least an E4 by that time. Then there's also the pesky fact that his gravestone lists him as an E5...
I've asked my family members, and they don't have the mindset to reckon with that kind of discrepancy. I assume he got severe NJP at some point; he was definitely an E3 on Guadalcanal, and he must have kept advancing then done something to get him busted all the way back to E2. Nobody knows, at this point, which just shows the limits of "family lore" when dealing with stuff like this.
Elsewhere, I've posted about my grandpa-in-law, who brought a bunch of Nazi stuff back from ETO. His sons (non-military) all just assumed he'd "taken them off a dead German," and he never told them for all the reasons soldiers don't talk to civilians about their service. But once the man found out I was a veteran he felt comfortable telling me he'd merely traded for all that crap after the war, in Nuremberg.
I never trust Family Lore. With the best intentions in the world, it's often wrong. Meaning no offense AT ALL to
@rudiewhitebwoy or his grandmother; they might simply not know, and be making stuff up to fill in gaps. I haven't even addressed the idea that this man was ever a Major... It's possible, but there are significant missing pieces.
E5 is LOW for that man after 1956.