As confirmed by Phil Parkinson after Tuesday's Johnstone's Paint Trophy tie at Crewe Alexandra, City are on the verge of completing a deal to sign Kilmarnock centre half Michael Nelson.
Nelson, 32, has signed a contract with the Bantams until June 2014 after City agreed an undisclosed free with the Scottish Premier League side for the defender's services earlier this week.
The deal to bring Nelson to the Coral Windows Stadium will be officially completed once City have received international clearance for the former Norwich City and Scunthorpe United man.
Speaking about the deal at Crewe's Alexandra Stadium last evening, Parkinson revealed: "Michael is an important signing for us to make."
"We have a relatively young back-four here at the moment and Michael will bring a bit of experience with him into the football club.
"We need someone of Michael's experience to get us through some of the tough fixtures that we have coming up in the second half of the season.
"Michael knows his way around a football pitch - he's tough, he's a leader and he will talk on the pitch and help our young players around him."
Nelson will join City having won the Scottish League Cup last March with Kilmarnock, beating Celtic 1-0 in the final.
Up until City's interest, the experienced centre half had been a regular this season in a Kilmarnock side currently sitting seventh in the Scottish Premier League.
Before his time north of the border, Nelson had also secured a League 1 winners medal in 2010 during his time at Norwich, as well helping Hartlepool United to automatic promotion out of League 2 in 2007.