Stephanie K. Mains

Ms. Mains has served as a director of Diamondback since April 2020. She has over 30 years of experience across diverse industry segments, including aviation, energy and transportation. Within the last 15 years, Ms. Mains has been building and expanding global businesses serving the oil and gas, utility, distributed power, and electrification spaces. In 2020, she held the interim CEO role for GE Power Conversion, a $1B advanced electrification and digital solutions business, leading the business to a profitable turnaround through COVID-19. From 2015-2019, she served as the President and CEO of Industrial Solutions, a GE and later ABB company. She led Industrial Solutions, a $2.7B GE business delivering technologies that distribute, protect and control electricity, through a transformation and divestiture to ABB. From 2013-2015, Ms. Mains served as President and CEO of GE Distributed Power Global Services, where she integrated and grew a $2.2B global business platform, servicing technologies that provide at the point of use power to the oil and gas, utilities, mining, and industrial segments. From 2006 until 2013, she held positions of increasing responsibility in GE Energy from General Manager to Vice President. During this time, she led the global build-out and transformation of a $4B service operation providing power equipment and services to utility and oil and gas customers. Prior to joining GE Energy, she spent 16 years across multiple GE businesses in financial and leadership positions, including CFO of GE Aviation Services-Contractual Services and Material Solutions, a $4B aviation material services business. Ms. Mains is currently the CEO of LSC Communications-MCL, a portfolio company of Atlas Holdings, LLC. She serves as a director and audit committee member of Gates Industrial Corporation (NYSE: GTES), a director, audit and compensation committee member of LCI Industries (NYSE: LCII), and is a member of the board of managers for Stryten Manufacturing, a privately held portfolio company of Atlas Holdings, LLC. Ms. Mains holds a B.B.A. in Finance from the University of Kentucky. Ms. Mains qualifies as an independent director under the Nasdaq listing standards.