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Josiah (Si) Pruiksma is a seasoned professional in the energy sector with extensive experience in grid operations and system training. Currently serving as Manager of Grid Operations and Grid Operations Industry Expert at Mosaic since June 2021, Pruiksma previously held the role of NERC System Operator Trainer at San Diego Gas & Electric from July 2018 to June 2021. Pruiksma's career includes significant positions at Duke Energy Corporation from January 2014 to June 2018, where roles included Senior Technical Trainer and NERC Certified Transmission Coordinator at the Transmission Control Center in Charlotte. Pruiksma began the career at Southern California Edison, working from March 2006 to December 2013 as a Power System Operations Specialist, Transmission System Operator, and Substation Operator, specializing in transmission and distribution system operations.