Jonathan J. Grider

TransAtlantic Petroleum Ltd. engages in the acquisition, exploration, development, and production of oil and natural gas. It operates through the following two segments: Turkey and Bulgaria. The company was founded on October 1, 1985 and is headquartered in Addison, TX.

Oilfield Management Services LLC is a diversified oilfield service company. It provides horizontal drilling and well stimulation services primarily in the onshore unconventional tight sands and shale oil and natural gas. The company operates through two segments: Completion & Production Services and Horizontal & Directional Drilling Services. The Completion & Production Services segment provides pressure pumping and pressure control services. The Horizontal & Directional Drilling Services segment is designed to drill unconventional wells. The company was founded on September 29, 2005 and is headquartered in Oklahoma City, OK.