Ken Puls

Excelguru Consulting, Canada

Gašper Kamenšek

Excel Olympics, Slovenia

Liam Bastick

SumProduct, Australia

Frédéric LE GUEN

Excel Exercise, France

Tony De Jonker

De Jonker Consultancy, Netherlands

Leila Gharani

Xelplus, Austria

Boris Hristov

356labs, Bulgaria

Boriana Petrova

ITraining, Bulgaria

To be announced