Effective November 19, 2018, the Board of Directors of Nuverra Environmental Solutions, Inc. appointed Charles K. Thompson to serve as Chief Executive Officer, and as the company's principal executive officer, on a non-interim basis. Mr. Thompson had previously been serving as the Interim Chief Executive Officer and interim principal executive officer since March 2018. In addition to serving as Chief Executive Officer, Mr. Thompson will continue to serve as a member and Chairman of the Board.

In connection with Mr. Thompson's appointment, he entered into an Employment Agreement with the company, effective as of November 19, 2018. Pursuant to the Thompson Employment Agreement, Mr. Thompson will serve as the Chief Executive Officer of the company for a term ending on the earlier of (i) a termination of Mr. Thompson's employment pursuant to the Thompson Employment Agreement and (ii) December 31, 2020. Effective November 15, 2018, the Board appointed Stacy W. Hilgendorf to serve as the Chief Financial Officer of the Company.

Mr. Hilgendorf previously served as the Company's Vice President and Chief Accounting Officer, and he will continue to serve as the company's principal accounting officer as well as principal financial officer. The company's prior Chief Financial Officer, Edward A. Lang III, will be leaving the company to pursue other opportunities effective November 30, 2018. Mr. Hilgendorf, age 49, has over 25 years of experience in corporate accounting, financial reporting, tax planning and compliance, internal audit, financial analysis and other corporate finance matters.

Mr. Hilgendorf joined the company in December 2013 as Corporate Controller and was appointed Vice President, Chief Accounting Officer and Corporate Controller in January 2015. Prior to joining the company, he served as Senior Director of Finance for Starwood Hotels and Resorts Worldwide, Inc. from August 2004 to December 2013, and prior to that as Corporate Accounting and Financial Reporting Manager for The Dial Corporation from August 2000 to August 2004. Mr. Hilgendorf began his career as a Manager in the Audit and Assurance practice at Ernst & Young in the Los Angeles and Phoenix offices from October 1991 to November 1996.