Professional Service Industries, Inc. (PSI) is an industry-leading engineering, consulting and testing firm with 85 offices nationwide and a successful history of serving clients dating back to 1881. With approximately 2300 staff, PSI is one of the nation’s largest firms providing engineering, scientific, technical and management solutions to public and private sector clients involved with site selection, design, construction and property management. Also, PSI provides a variety of specialty engineering and testing services to business and industry. Whether your project is large or small, on one site or in multiple locations, the services and staff at PSI can provide the resources and solutions you require. And with PSI, you will feel confident that you are receiving accurate, consistent, and timely Information To Build On. PSI is only as good as the people we employ. We hire talented people who want to succeed and make the PSI experience great for their co-workers and our valued clients, from technical to management and from sales to administration. Then, we provide them with the tools, training and environment to do so.