Professional Service Industries

Professional Service Industries, Inc. (PSI) is an industry-leading engineering, consulting and testing firm. The job it does: managing your IT, from help desk to infrastructure, as an outside partner.

Who is it for? Mostly small and mid-sized companies. Related areas on their profile: Building Material, Consulting, Environmental Consulting, Industrial Engineering and Real Estate. As a large company team themselves (1,001 to 5,000 people), they tend to serve customers of a similar scale best. Bigger vendor, more process. Budget time for procurement.

Professional Service Industries is based in Oak Brook, Illinois and around since 1961. You can read more at psiusa.com.

Things worth asking about: response SLAs, onboarding, and what is billed per hour. Get the renewal terms in writing before the first invoice.

If you have worked with Professional Service Industries, tell the next buyer what you paid and what surprised you. That is the part of this page we cannot write.