Parsley Energy, Inc. announced the appointment of David Dell'Osso as Executive Vice President—Chief Operating Officer, effective October 9, 2018. Mr. Dell'Osso will succeed Matt Gallagher, who will remain President of the company until his previously announced appointment as President and Chief Executive Officer, which is expected to occur on January 1, 2019. Mr. Dell'Osso will assume responsibility for company-wide development, production, and engineering functions. Prior to joining Parsley, Mr. Dell'Osso was employed by Southwestern Energy Company, where for the last 13 years he served in a variety of positions of increasing responsibility, including, at the time of his departure, Senior Vice President & General Manager of the Northeast Appalachia Division. Other roles included management of exploration and production, midstream, and commercial teams.