Kees Tamminga currently serves as Hoofd inkoop, Facilitaire Zaken & DIV at de Alliantie since September 2020. Tamminga has been a landelijk scheidsrechter heren hoofdklasse for KNHB since 2008. Prior experience includes roles as Global Head of Data Vendor Management at Nordea Markets from February 2018 to May 2020, and at Nordea from September 2016 to May 2020 alongside a position as Head of Global Market Data, IT and Trading Solutions. Tamminga was a Senior Consultant at ABN AMRO Bank N.V. from August 2012 to July 2016, and earlier held various positions at NYSE Euronext from April 2006 to July 2012, including Business Development and Product Management. Tamminga began a career as a marketmaker at curvalue from 2004 to 2006. Tamminga holds an MSc in Management Science from Nyenrode Business University, obtained in 2003.