He will sit alongside current co-chairmen Tim Atkin MW, Sam Harrop MW, Charles Metcalfe, Derek Smedley MW and this year’s overseas co-chairman Victor de la Serna from Spain.
Chris Ashton, IWC event director said: “Having Oz as one of the IWC’s co-chairmen strengthens our senior team, and makes it an even more formidable line-up.
"We’re now in our 27th year and will soon begin the annual task of selecting the world’s best wines from the 46 different countries that have submitted wines into this year’s competition."
The IWC is the world’s most prestigious, influential and meticulously judged wine competition. Over 400 experienced judges, including many Masters of Wine, will taste each medal-winning wine at least three (and sometimes up to six) times, scoring it for "faithfulness to variety, region and vintage".
Clarke said: “I feel as though I am moving back into the bosom of the family. Long ago we all set out to change the world of wine and make it a better place. Every year the IWC continues the quest, and I’m delighted they’ve asked me back to shoulder some of the burden. I’ve just been to my dentist to prepare my teeth for the task.”
Medal winners of the prestigious challenge will be announced on May 18 at the London International Wine Trade Fair at Excel.
The 2010 medal winners will receive additional exposure by being featured on the new IWC iPhone App. Recently launched, the App is the first of its kind to provide consumers with access to information on the world’s best wines at the touch of a screen.