Operational since 1881, Professional Service Industries (PSI) Inc. is an engineering consulting and testing firm with 125 offices across the United States. Located in Nashville, Tenn., the company provides services in environmental consulting, geotechnical engineering, construction materials testing/engineering, industrial hygiene, facilities, roof consulting and nondestructive examination. Additionally, it provides specialty engineering and testing services in engineered wood products, plumbing products, skylight and panel testing. It caters to various markets, including commercial development, energy/utilities, health care, industrial/manufacturing and retail/hospitality. The affiliations of Professional Service Industries (PSI) Inc. include American Association for Laboratory Accreditation (A2LA) and American Council of Engineering Companies (ACEC), among others.
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