Sylvester Johnson

Shell Oil Co. manufactures petrochemicals and distributes gas and oil products. The company was founded in 1912 and is headquartered in Houston, TX.

Callon Petroleum Co. engages in the exploration, development, acquisition, and production of oil and natural gas properties in the United States. It focuses on unconventional oil and natural gas reserves in the Permian Basin. The company was founded by Sim C. Callon and John S. Callon in 1950 and is headquartered in Houston, TX.

Carrizo Oil & Gas, Inc. engaged in the exploration, development, and production of natural gas and oil. Its operations included Delaware Basin and Eagle Ford Shale. The company was founded by Sylvester P. Johnson IV and Steven Alan Webster in December 1993 and was headquartered in Houston, TX.

Basic Energy Services, Inc. engages in the provision of well site services to oil and natural gas drilling and producing companies. It operates its business through the following segments: Completion and Remedial Services, Well Servicing and Water Logistics. The Completion and Remedial Services segment utilizes coiled tubing services, air compressor packages specially configured for underbalanced drilling operations, an array of specialized rental equipment and fishing tools, thru-tubing, and snubbing units. The Well Servicing segment encompasses a full range of services performed with a mobile well servicing rig, including the installation and removal of downhole equipment and elimination of obstructions in the well bore to facilitate the flow of oil and natural gas. The Water Logistics segment focuses on the fleet of trucks and related assets, including specialized tank trucks, storage tanks, water wells, disposal facilities water treatment, and related equipment. The company was founded in 1992 and is headquartered in Fort Worth, TX.

Summit Gas Resources, Inc. engages in the acquisition, exploration, and development of natural gas reserves. The company was founded in 2003 and is headquartered in Sheridan, WY.

SEARCH Homeless Services is an organization that focuses on helping individuals and families who are homeless in the area. The non-profit company is based in Houston, TX. The company works to engage, stabilize, educate, employ, and house those in need.