Nomac is an affiliate of Chesapeake Energy Corporation, the second-largest producer of natural gas, a Top 15 producer of oil and natural gas liquids and the most active driller of onshore wells in the U.S. Chesapeake has been named for six consecutive years to FORTUNE magazine's 100 Best Companies to Work For® list. Virtually all of Nomac’s rigs are employed in unconventional shale resource plays, making Nomac one of the leading horizontal drillers.