Jeffrey Christman

Rock Hill Capital Group, LLC (Rock Hill Capital) is a private equity firm founded in 2007 by Randall B Hale. The firm is headquartered in Houston, Texas.

Diversified Well Logging, Inc. engages in mud logging and mud logging related services. The firm mud-logging services with operations and group, electronics and a shop, yard as well as logistics group. The firm offers mud logging systems. The company was founded in 1952 and is headquartered in Reserve, LA.

U.S. Industrial Holdings LLC provides civil construction services. Its services include industrial, marine, site development, highway streets and bridges, material sales and trucking, disaster relief/debris clearing and disposal and hydro excavation. The company is headquartered in Lafayette, LA.

JP Hydro LLC provides pressure testing and pipeline maintenance services for the oil and gas industry. It also offers hydrostatic pressure testing, pipeline cleaning, pipeline integrity and maintenance, and midstream services. The company was founded by Justin Peter in 2011 and is headquartered in Houston, TX.

Core International LLC engages in the design, production, and distribution of engineered rubber products through its subsidiaries. Its products include oilfield rubber products, tank car gaskets, offshore marine defender systems, drilling elastomer, kam gaskets, shock cell, and rub strip. The company was founded by Cody W. Johnson in 1999 and is headquartered in Houston, TX.

Big City Access, Inc. engages in provision of scaffolding and access equipment services. It offers suspended scaffolds, supported scaffolds, trash chutes, and safety equipment. The company was founded by Barbara Roberts in 2002 and is headquartered in Houston, TX.

Lightwerks Communication Systems, Inc. provides audio and video equipment integration and installation. It offers their services to customers in the corporate, government and educational sectors. The company services also encompass design and engineering, project management and documentation. The company was founded John Godbout in 1991 and is based in Scottsdale, AZ.

Boring & Tunneling Co. of America LLC provides heavy underground construction services. It specializes in boring and tunneling construction and trenchless technology consulting and contracting services. The firm provides trenchless construction under roadways, railroads, waterways and buildings. It offers underground construction of tunnels, drainages, pipelines, shafts, fiber optics, grouting and pipe ramming and wood box tunneling services. The company was founded by Gilbert Manly Turner in 1948 and is headquartered in Houston, TX.