3. Get reference accounts in your industry. It is highly beneficial to speak with existing customers of the integration firm. You will usually get candid feedback. At least call these references, but meet on-site if you can to examine the integrator's work. Two minutes in a wiring closet or data center can speak volumes about an integrator's quality of work. Agood IT integrator should have several outstanding testimonials from people willing to put their names on the line. No excuses.