Diamondback Energy, Inc. announced Russell Pantermuehl, currently Executive Vice President and Chief Engineer, will retire from his current role at the end of 2021. Russell and the company have agreed that following his retirement he will serve as an advisor to the company through December 31, 2022 in a limited role. Al Barkmann, currently Vice President of Reservoir Engineering, has been promoted to Senior Vice President of Reservoir Engineering, and will assume many of Russell?s prior responsibilities, reporting to Danny Wesson, EVP of Operations. Also, Yong Cho, currently Vice President of Drilling, has been promoted to Senior Vice President of Drilling and will continue reporting to Danny. These changes are effective immediately.