Spencer Armour

Spencer D.
Armour was the founder of Lone Star Mud, Inc., founded in 1986, serving as President from 1986 to 1997.
Mr. Armour was the founder of Sledge Drilling Holding Corp., founded in 2005, serving as Chief Executive Officer from 2005 to 2007.
Mr. Armour was the founder of Sledge Drilling Corp., founded in 2005, serving as Chief Executive Officer from 2005 to 2006.
Current jobs include Director at ProPetro Services, Inc.; Independent Director at CES Energy Solutions Corp.
since 2018; Director at Viper Energy Partners GP LLC since 2017; Independent Director at Viper Energy, Inc. since 2017; Director at Laguna Resources LLC; and Partner at Genesis Investments, LLC since 2019.
Former jobs include Chairman at ProPetro Holding Corp.
from 2013 to 2019; Director at Mammoth Energy Partners LP; Independent Director at VNOM Sub, Inc. from 2017 to 2025; Vice President-Corporate Development at Basic Energy Services, Inc. from 2007 to 2008; President at Ambar Lone Star Fluid Services LLP from 1998 to 2001; Member-Regents Board at University of Houston System Board of Regents; President at PT Petroleum Partners LLC from 2013 to 2019; and Executive Vice President at Patterson-UTI Energy, Inc. from 2001 to 2005.
Education includes an undergraduate degree from the University of Houston, conferred in 1977.