Krishna Shivram has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Shivram currently serves as Director of Ranger Energy Services Inc. since August 2017 and of Superior Energy Services Inc. since April 2021, both of which are oilfield service companies, as well as Director of Sentinel Energy Services Inc., a special purpose acquisition company, since November 2017. He also served as Chief Executive Officer of Sentinel from November 2017 until December 2020. Prior to that, Mr. Shivram served as interim Chief Executive Officer of Weatherford International plc from November 2016 to March 2017 and Executive Vice President and Chief Financial Officer of Weatherford International plc from November 2013 until November 2016. He has over 30 years of financial and operational management experience in the oilfield industry and previously worked for Schlumberger Ltd. in a variety of roles across the globe, including as Vice President and Treasurer from January 2011 until November 2013. Mr. Shivram has a Bachelor of Science degree in Economics and Commerce from Sydenham College in India and is a Chartered Accountant.