You said L3 so I was curious. I looked up the guy's LinkedIn [0] and honestly an L3 engineer would have a lot more context about Google's search. Danny, what do you even do?
Before Google, Danny Sullivan was a well respected search engine blogger/journalist. As far as I know, he isn't an engineer. There's no need to be rude.
I work for our search quality team, directly reporting to the head of that team, to help explain how search works to people outside Google and bring concerns and feedback back into team so we can look at ways to improve. I came to the position about six years ago after retiring from writing about search engines as a journalist, explaining how they work to people from 1996 onward.