In connection with the appointment, Richard R. Isaak will cease to be the Senior Vice President and Chief Financial Officer of the Company as of the Effective Date. In addition, the Board terminated Mr. Isaak’s employment with the Company, without cause, effective as of the Effective Date. Mr. Isaak’s termination was not related to the Company’s financial or operating results or to any disagreements or concerns regarding the Company’s financial or reporting practices. The Company thanks Mr. Isaak for his service and contributions to the Company.

Prior to joining the Company, Mr. Winkler served as Chief Financial Officer of Burrow Global, a Texas-based full-service engineering, procurement, and construction firm serving the energy industry. Before his tenure at Burrow Global, Mr. Winkler spent 15 years as an investment banker at BMO Capital Markets and Deutsche Bank Securities, advising public and private clients in the natural resources sector on more than $10 billion of M&A transactions. He led capital raises across the full capital structure including IPOs, follow-on equity, high-yield and convertible notes, bank and institutional loans, and acquisition financing. Mr. Winkler holds an MBA from Rice University’s Jones Graduate School of Management, where he was named a Jones Scholar, and a Bachelor of Arts in Economics, Managerial Studies, and Policy Studies, also from Rice University.