National Elevator Inspection Services, Inc. (NEIS) is the largest, most reputable provider of Third Party Elevator Inspection Services. Since 1967, we've set the standard for excellence in providing inspections and related services for vertical conveyances; including elevators, escalators, moving walkways, dumbwaiters, and lifts. Call NEIS for the best in elevator inspections and consulting, test witnessing and verification, maintenance audits, plan review, acceptance testing, and more.