B.Grimm Power
Katrat Upayokin currently serves as the First Senior Vice President at B.Grimm since November 2022, while also holding the position of Managing Director at PANRAIL Thailand, a role undertaken since September 2014. From June 2010 to May 2014, Katrat Upayokin worked as the Senior Vice President and Division Country Lead for IC RL/MOL at Siemens.
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