American Testing and Inspection Services Acquires A Smart Elevator Solution and 1 Able Elevator Inspector

ATIS Acquires Kenneth H. Lemp Elevator Consultant, Inc.

October 6, 2020

Engineering Services

American Testing and Inspection Services (ATIS) has acquired Kenneth H. Lemp Elevator Consultant, Inc., expanding ATIS's consulting capabilities to deliver full‑lifecycle elevator and conveyance management services. The deal adds K.H. Lemp's expertise in new elevator construction, modernization design, project management, and maintenance audits to ATIS's existing inspection and conveyance management platform.

ATIS Acquires M.A.N Elevator Inspections

January 1, 2025

Engineering Services

ATIS, a portfolio company of Thompson Street Capital Partners (TSCP), has acquired M.A.N Elevator Inspections, a Florida-based provider of elevator inspection services. The deal expands ATIS's footprint and inspection capacity across southeastern (and western) Florida; terms were not disclosed.

ATIS Acquires Vermont Elevator Inspection Services (VEIS)

November 13, 2024

Engineering Services

ATIS, a portfolio company of Thompson Street Capital Partners (TSCP), has acquired Vermont Elevator Inspection Services (VEIS). The add-on expands ATIS' geographic footprint into Vermont and strengthens its local inspection and regulatory compliance capabilities; terms were not disclosed.

ATIS (Thompson Street-backed) Acquires Technical Inspection Agency USA (TIA USA)

September 15, 2025

Professional Services

ATIS, a St. Louis-based provider of elevator and escalator inspections and consulting (backed by Thompson Street Capital Partners), has acquired Technical Inspection Agency USA (TIA USA), a Las Vegas–headquartered provider of vertical transportation inspections and consulting serving Nevada and Arizona. The deal expands ATIS’ national footprint and technical capabilities in complex vertical transportation systems; terms were not disclosed.

ATIS Acquires Bayline Lift Technologies

December 23, 2025

Engineering Services

ATIS, a portfolio company of Thompson Street Capital Partners (TSCP), has acquired Bayline Lift Technologies, an independent elevator inspection and consulting firm headquartered in Norfolk, Virginia. The add-on strengthens ATIS's footprint in the Mid-Atlantic and expands its inspection and consulting capabilities for government and private-sector clients.

Elevator Service Inc. Acquires American Elevator

June 2, 2025

HVAC & Mechanical

Elevator Service Inc. (ESI) has acquired American Elevator, an Oklahoma City–based provider of elevator maintenance, repair and modernization services. The deal expands ESI's service footprint across the Southwest (Oklahoma and West Texas) and brings American Elevator's employees and regional customer relationships into the ESI platform.