C&J Energy Services, Inc. provides well construction, well completion, well support, and other complementary oilfield services and technologies to oil and gas exploration and production companies throughout the continental United States. It operates through completion services and well-support services segments. The Completion Services segment provides hydraulic fracturing; cased-hole solutions comprising cased-hole wireline, pumpdown, wireline logging, perforating, pressure pumping, well site make-up and pressure testing, and other complementary services; and well construction and intervention services, which include cementing, coiled tubing, rig services, fluids management, and other completion and well support services. This segment also engages in the engineering and production of various parts and components, such as perforating guns and addressable switches, which are used in the completion process. The Well Support Services segment offers rig services, such as providing workover and well servicing rigs that are primarily used for the routine repair and maintenance of oil and gas wells, re-drilling operations, and plugging and abandonment operations; fluids management services, including storage, transportation, and disposal services for fluids used in the drilling, completion, and workover of oil and gas wells; and other special well site services, such as fishing, contract labor, and tool rental services for the completion and workover of oil and gas wells. The company was founded in 1997 and is headquartered in Houston, Texas with an additional office in Corpus Christi, Texas. As of October 31, 2019, C&J Energy Services, Inc. operates as a subsidiary of NexTier Oilfield Solutions Inc.