John Giannopoulos

John Giannopoulos is an accomplished financial and tax advisory professional with extensive experience, currently serving as the General Manager Advisory and Head of Tax Advisory Services at ΣΟΛ Crowe since February 2014. Prior experience includes co-founding Greenvis, where responsibilities encompassed establishing the company's financial and legal frameworks. John has also held management positions, including General Manager of Finance & Administration Services at Cosmoline S.A. and Regional Director of Finance and Administration for Hay Group in South East Europe, where strategic business development occurred across multiple countries. Early career roles at Ernst & Young and Arthur Andersen involved managing financial operations and leading significant mergers. John holds a Bachelor's degree in Economics from the University of Patras and has a solid foundation in finance, tax, and organizational management.