Reid, who has been working for UBM Live for the past 14 years, will be leaving in mid-September to take up his new role on Clarion Event's defence and security exhibition, DSEi.
He said: "I’ve had a fantastic 14 years at UBM, but I’m ready to move on to a new challenge. Clarion is at an exciting period in its development and provides a new opportunity that I’m really looking forward to."
The move will see Confex Group products being headed up by Jonny Sullens, who is currently portfolio director of Leisure Industry Week.
"I am delighted to be taking responsibility for the Confex Group. Heading up the Confex Group for five years Duncan has achieved great success and leaves behind him an exceptionally formidable team," reveals Sullens.
UBM Live group director Simon Parker added: "I’d like to thank Duncan for his great contribution over the years. The portfolio has constantly developed under his management and there are already very exciting plans in place for next year’s Confex."
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