Mr. Nightingale joined the Combined Arms Board of Directors in May 2017. He has served as the Executive Vice President & Chief Operating Officer for Rockwater Energy Solutions, Inc. since June 2015. Mr. Nightingale has served as the Senior Vice President Fluids Management and Executive Vice President – Water Management since he joined Rockwater in April 2012. Prior to joining Rockwater, he served as the President of I.E. Miller, a former subsidiary of Complete Production Services, in Houston, Texas. Mr. Nightingale worked at Complete Production Services for seven years in a variety of leadership roles including running their rig and heavy equipment moving division and one of their well servicing companies in the Rockies. Prior to that, he spent over 25 years in a number of engineering and operating management roles at several energy and midstream companies. Mr. Nightingale obtained his B.S. in Civil Engineering from Bradley University in Peoria, Illinois, and his MBA from the University of Houston.