Alta Mesa Resources, Inc. announced that Craig W. Collins has joined the company as Vice President and Chief Operating Officer-Midstream. Mr. Collins joins the company after 15 years with Anadarko Petroleum and Western Gas Partners where he served as the Senior Vice President and Chief Operating Officer of Western Gas Partners. He held multiple midstream leadership roles at Anadarko Petroleum with responsibility for its commercial and engineering functions, and was instrumental in establishing infrastructure positions in the Eagle Ford shale, Delaware basin, and DJ basin, both through acquisitions and organic growth. Also, while at Anadarko, he held positions of increasing responsibility in Treasury and Corporate Development.