Thomas Eliot Gottsegen

J.F. Lehman & Co. (JF Lehman) is a private equity firm founded by John Francis Lehman, Donald Glickman and Keith E. Oster in 1992. The firm is headquartered in New York with an additional office in Arlington, Virginia.

ParFab Industries, Inc. operates as a fabrication shop, that provides production services to petrochemical and energy industries. Its shop fabrication services include steel fabrication, ASME piping, blasting, painting, and insulation services for fired heaters, transfer lines, hydrogen reformers, package boilers, structural steel, and custom projects. The company was founded in 2001 and is headquartered in Inola, OK.

Rockwater Energy Solutions, Inc. provides water management and chemical technologies solutions. It offers fluids conditioning, water transfer, flow back and well testing, fluid logistics, above-ground storage, construction services, completion and production of chemicals, coiled tubing chemicals, and chemical logistics. The company was founded on June 1, 2011 and is headquartered in Houston, TX.

ParFab Industries LLC provides components and field services for heat and pressure-intensive applications in the downstream energy infrastructure market. The company is headquartered in Inola, OK.

NRC Group Holdings LLC operates as a private equity firm. It serves the aerospace, defense, maritime, government, and environmental sectors. The company was founded on April 30, 2018 and is headquartered in Wilmington, DE.

Part of KSG International Ltd., Sureclean Holdco Ltd. operates as a holding British company with interest in providing cleaning and waste management services. The company is based in London, UK. The company was founded in 2014. Sureclean Holdco was acquired by KSG International Ltd. from Republic Services, Inc. on January 27, 2023.