Extraction Oil & Gas, LLC announced that on October 28, 2016, Tom L. Brock, age 44, was appointed Vice President, Chief Accounting Officer of the Company and was designated the principal accounting officer of the Company. Mr. Brock joined the Company in August 2016 and prior to such appointment served as Senior Director of Accounting. Mr. Brock previously served as the Vice President, Chief Accounting Officer and Corporate Controller of American Midstream GP, LCC.