Effective April 2, 2021 Select Energy Services, Inc. decided to realign leadership responsibilities relating to its organizational structure. As of the Effective Date, Michael Skarke will act as Executive Vice President and Chief Operating Officer and will oversee each of the company’s operating segments. Adam Law will act as Senior Vice President, General Counsel, Corporate Secretary and Chief Compliance Officer and will oversee the company’s legal, human resources, safety and compliance functions. Prior to the Effective Date, Mr. Skarke served as Executive Vice President, Corporate Development, Sales and Operational Support, and Mr. Law served as Senior Vice President, General Counsel and Corporate Secretary. The company has not and does not intend to enter into or amend any compensatory arrangements with Mr. Skarke or Mr. Law in connection with the change to each such individual’s role and responsibilities as described herein. For an explanation of the business experience of Messrs. Skarke and Law, please see their respective biographies as disclosed in the company’s definitive proxy statement for the 2021 annual meeting of stockholders filed with the Securities and Exchange Commission on March 25, 2021.