About JDM - Outsourced Tech Support Services Stockport JDM Computing are located on the Cheshire border between Stockport and Macclesfield and serve the whole of the North West.. Whether your needs range from a single computer to a fully supported network, JDM provide the flexibility and expert support to keep your business running smoothly and efficiently, from server and computers repairs to Network upgrades and improvements. Our IT Support personnel are fully qualified and familiar with all the software options for small to medium businesses. JDM can offer both monthly support packages or support on a per fix basis. Monthly support customers will benefit from unlimited telephone support and a quarterly overview of their IT.