U.S. Silica Holdings, Inc. announced the promotion of Billy Ray Smith to senior vice president and president, Oil & Gas Proppants, effective Jan. 1, 2018. Mr. Smith succeeds Don D. Weinheimer, who will be retiring but will stay on for an interim period to support the transition as vice president of strategic marketing. Mr. Smith will join the Company's Executive Management Team and report to Brad Casper, executive vice president and chief commercial officer. Mr. Smith joined U.S. Silica in March, 2017 as vice president of Oil & Gas, bringing over two decades of experience in the Oil & Gas exploration and services business. Prior to joining U.S. Silica, Mr. Smith held various positions of increasing responsibility at Halliburton, a global energy services company since 1995, including as North American Technology Director from Oct. 2015 to March, 2017.