[GlenTheMachine]

I’d guess he’s a spacecraft engineer who does work in a neutral buoyancy tank. In the Us that usually means NASA/Johnson. That or he’s a spacecrqft engineer at a contract firm that picks up side projects doing underwater automation work, which is not that uncommon in this small field. Oceaneering Space Systems, for example.

[spiritplumber]

The second one. I've done a couple things at NASA/Ames and it has been generally fun, although there have been a couple of weird episodes (Like me not being authorized to check out stuff from my own repository due to not being a US citizen, and being told that it wasn't a unique case).