With Tom Newey signing a two year contract yesterday, Douglas intimated in The Star that more players may follow.
"The area Ronnie has been looking to strengthen is the back four and Tom's experience will really help the team. Left-back was a position we were short of cover after letting Andy Nicholas and Marc Joseph go," said Douglas.
"Tom is a local lad from Aston, he is a quality player who Ronnie has admired for some time. We believe he will provide some serious competition for Jamie Green in the left back position."
Newey joins Ryan Cresswell and Luke Ashworth as Moore reshapes a new look defensive line up for next season.
"We are very pleased with the business we have done so far and there is still room for Ronnie to bring more players in," added Douglas.