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Sanna Sierla is a Transformer Specialist and Transmission Line Specialist at Fingrid Oyj, a position held since March 2013. Prior to this role, Sanna worked as a Life Cycle Specialist and Master Thesis Worker at Helen Sähköverkko Oy from 2009 to March 2013. Sanna holds a Master's degree in Electrical, Electronics and Communications Engineering from Aalto University, obtained between 2004 and 2010.