Dismissed
"You're dismissed" mean "You can go/leave the room. We're done here"

How do you use "to dismiss" to mean "to fire/lay off someone"? Does "You're dismissed" mean "You're fired/laid off" too?
Or does it have to be in a sentence like this:
“His resume looks great, but it turns out he was dismissed from several of his previous positions.”

Question

Dismissed
"You're dismissed" mean "You can go/leave the room. We're done here"

How do you use "to dismiss" to mean "to fire/lay off someone"? Does "You're dismissed" mean "You're fired/laid off" too?
Or does it have to be in a sentence like this: 
“His resume looks great, but it turns out he was dismissed from several of his previous positions.”

Answer

Hello!
That sentence looks correct, I would add "that"  as it identifies a specific thing.
“His resume looks great, but it turns out "that" he was dismissed from several of his previous positions.”

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