May 20, 2010 - Dave Ulmer has accepted the position of Diversified Market director for U.S. Silica, working from the company's new offices in Frederick, Md. His duties include expanding the reach of U.S. Silica in the Building Products, Fillers/Extenders, Filtration, Recreation, and Florisil sectors, as well as developing emerging markets and distribution channels. Ulmer previously worked for 25 years at E. W. Bowman, Inc.
