Didsbury-based NJL Consulting has been appointed by Praxis Holdings as planning advisor for the former RAF Sealand site in Deeside, North Wales.
Praxis paid an undisclosed sum in July to buy the 247 acres of prime development land from Defence Estates.
The site forms part of the Northern Gateway project, which is an extension to Deeside Industrial Park, comprising a total of 580 acres either side of the A550 trunk road running through Flintshire.
NJL said the former RAF Sealand site will assist with the delivery of a mix of new residential, commercial, community and retail opportunities.
Chris Jones, partner at NJL, said: "There is massive potential, being such a large and underutilised site. I believe the fit between our client's aspirations and NJL's own track record of delivery will be a powerful combination."
NJL is working alongside Isle of Man-based Praxis to coordinate the planning process and anticipate an application being submitted early next year.
The Expeditionary, Radar and Airfield Squadron vacated RAF Sealand in 2006 when it moved to Scampton, near Lincoln.