G.J. Oliver is a family-owned and operated steel fabricator and manufacturer of lube oil and fluid handling systems. It provides pressure vessels, compressors, condensers, boosters and pollution control equipment. The company also manufactures pipe spools, boring mills, console systems, pumps, and jacket water and dry gas seal systems. G.J. Oliver offers computer-aided design and engineering services. It provides fabrication services for steel, aluminum, Monel, Inconel and other metals. The company has heat treating, sand blasting, painting and machining capabilities. Established in 1960, G.J. Oliver is certified by the American Society of Mechanical Engineers. The company maintains one of its manufacturing facilities in Phillipsburg, N.J.