Sometimes these engineers won't talk that much or only talk when a discussion is actually meaningful. Sometimes what they say won't matter anyways so they simply focus on implementation and development work.
They are among the few who deliver solid results.
Is management aware of this phenomena?
@OP Yes, they are aware but do not care as they favor all incompetent workers as most of them are either relatives or friends.
What engineers are you talking about?
Software Engineers?
Security Engineers?
Infrastructure Engineers?
Security and Infrastructure, I agree. Especially since Disneyland took over...