Loughran, the current business development director at MEC, will work across the Aegis brands Carat, Vizeum, Glue Isobar and iProspect and report to Rob Horler, Aegis Media's UK chief executive.
Aegis has also promoted Helen Adcock to the post of Carat UK new-business and marketing director. Adcock was fomerly the client director at Carat and replaces Natalie Mead, who recently joined Manning Gottlieb OMD as its new-business director. She will report to Carat's managing director, Tracy De Groose.
Horler said: "Cormac is in a league of his own when it comes to new-business generation. He'll prove a real asset to the group."
Stuart Bowden, the MEC managing director, said the agency was "thinking about how to reorganise new business and marketing".