I have two PhDs yet somehow
I'm the JANITOR
The Big Bang Theory Season 7, Episode 11
Here, I am JANITOR.
In former Soviet Union, I am physicist.
The Big Bang Theory Season 1, Episode 13
Hans the JANITOR.
The Big Bang Theory Season 11, Episode 15
So may I introduce the third-floor JANITOR,
the lady from the lunch room and...
The Big Bang Theory Season 1, Episode 13
...and eat with the JANITOR.
The Big Bang Theory Season 4, Episode 22