U.S. Silica Holdings Inc. recently announced the promotion of Michael L. Winkler to vice president and chief operating officer. He will continue his oversight of the company’s mining and plant operations. He will also assume increased responsibilities, including leadership of the firm’s supply chain and logistics capabilities, as well as its IT function.

“Mike’s outstanding results leading the operations team for the last two years and his commitment to safety, continuous improvement and productivity make him the ideal candidate for this role,” said Bryan Shinn, president and CEO. “As COO, Mike will provide leadership to ensure that internal cross-functional initiatives are flawlessly executed from mining through delivery and aligned with best-in-class customer service.”

Winker has served as the company’s vice president of Operations since June of 2011. Prior to joining U.S. Silica, he held various positions within operations for the Campbell Soup Co. and Mars Inc.

For more information, visit www.ussilica.com.