Prepare technical drawings, specifications of plumbing systems to ensure that installation and operations conform to standards and customer requirements. Operate computer-assisted engineering or design software or equipment to perform engineering tasks. Direct or coordinate manufacturing, construction, installation, maintenance, support, documentation, or testing activities to ensure compliance with specifications, codes, or customer requirements. Design, implement, maintain, or improve plumbing instruments, equipment, facilities, components, products, or systems for commercial, industrial purposes. Prepare specifications for purchases of materials or equipment. Perform detailed calculations to compute and establish manufacturing, construction, or installation standards or specifications.