Well I dont know about Michael Phelps, but It would make
sense
for Poseidon to be a pro swimmer, or maybe a navy sailor, or perhaps a marine biologist/ scuba diver.
Hephaestaes I'm really curious about, working at NASA you said? I would hope he ended up better then when he was a god. Lets face it, out of all the gods that had it rough dear Vulcan was top of
the list
. I mean he was dropped by his Mother Hera and crippled as result and was casted out for it until he built her fienly ed chair she couldn't get out of and she was force to apologise and let him back in which is just a freaking prank compared ti what Hera does to punish her victims of infidelity. Speaking of which he was married to the hottest goddess of all time and she cheated on him, even after he trapped her and Aries together, and for all his trouble he is simply ruducd to the work camel of the gods.
If anyone deserves pay back its him