After a formation in Law and Art History, Harold Hessel obtained his diploma of Commissaire-Priseur (auctioneer) in 2004.
He first worked for five years as an auction clerk with the auction house Rieunier & Associés. He then joined the team of Expertissim in 2009 as an antique expert.
Since 1999, Igor Montoussé du Lyon was conducting inventories for Christie's in London and then for an expert firm in Paris.
He is one of the two founders of Expertissim.
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