Founded in 1963 by Charles B. Holder, Jr., Hol-Mac Corporation serves original equipment manufacturers as one of the leading suppliers of steel fabrications, cylinders and tanks. The company has steel fabrication, cylinder, benchmark tank and heavy fabrication plants. Its fabrication services include tooling design and construction, contract manufacturing, design and custom metal fabrication, prototype to production runs, assemblies and subassemblies. The company provides computer-aided design and manufacture facilities, and an experienced in-house engineering team. It additionally offers prototyping services, destructive and nondestructive testing, documented in-house process controls with raw material traceability, and contamination control using particle counters and Millipore particulate residue testing. Hol-Mac Corporation is located in Bay Springs, Miss.