McConnell will head public sector, retail, utilities and automotive accounts. He was previously sales and marketing director at Broadsystem, and will report to Dataforce group CEO Ian Lancaster.
He is joined by Richard Hanrahan, who is promoted internally to business unit director, heading key accounts including Tenpin and First Choice. He is promoted from the role of business development director.
That role will now be filled by Andy McKnight, who is also joining from Broadsystem, where he was head of sales. He will report to Nick McConnell.
Lancaster said: "These latest appointments will definitely bolster our capabilities and improve our depth of expertise to provide unparalleled integrated customer strategy and communications."