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Sioux has promoted Shelby Docken to the position of customer service manager. Docken began his career at Sioux in November 1988 as an inside sales manager. His position developed into a concrete market segment manager and product manager for products engineered and manufactured exclusively for this industry. Docken's promotion has created an opening for a product application specialist for the concrete industry. For more information, visit www.sioux.com, or call 888-763-8833 or 605-763-3333.