Former Stoke defender Broomes has signed a deal until the end of the season and Welsh admits he had already begun barking out orders.
Welsh said: "I think Marlon is a good signing.
"We know what he is like in training. He's ordering people around and he's only been here for a few weeks!
"That's a good thing. Marlon has been around the game with a few clubs and has experience, which is going to be vital for a young squad like ours. He's a good defender and a good organiser."