U.S. Silica Holdings, Inc. announced that it has appointed Jimmi Sue Smith to its Board of Directors effective July 14, 2023. The election of Ms. Smith increases the size of the Company's Board to eight members. Ms. Smith will also serve as an independent member of the Audit Committee of the Board.

Ms. Smith has served as Chief Financial Officer of Koppers Holdings Inc., an NYSE-listed company and leading integrated global provider of treated wood products, wood preservation chemicals and carbon compounds since January 2022. Ms. Smith joined Koppers in 2020, serving as Vice President of Finance and Treasurer until her promotion to Chief Financial Officer. Prior to her role at Koppers, Ms. Smith served as Senior Vice President and Chief Financial Officer of EQT Corporation, a natural gas producer, from November 2018 to August 2019, and at various other roles of increasing responsibility at EQT from 2007 to November 2018.