Our story
Founded to improve safety, efficiency, and accountability in vertical transportation
Lift Systems International LLC provides independent, expert consulting for elevators, escalators, and moving walkways across the United States and internationally — backed by decades of hands-on experience and a deep commitment to compliance and education.
At the heart of Lift Systems International is a belief that every rider, technician, and building owner deserves systems that meet the highest safety and performance standards. Through technical expertise, investigative precision, and industry advocacy, we help our clients navigate complex challenges with confidence.
David Guerin
Owner & Managing Member · QEI · CET-S
Meet David Guerin
David Guerin is the Owner and Managing Member of Lift Systems International LLC, bringing more than three decades of experience in the vertical transportation industry. With over a decade leading the firm and more than 35 years in the field, David is recognized as a trusted authority in elevator safety, compliance, and consulting.
He is a Qualified Elevator Inspector (QEI) and a Certified Elevator Technician Supervisor (CET-S), credentials that reflect the highest standards of technical competence and ethical responsibility in the industry.
David provides expert consulting across all aspects of vertical transportation, including:
- Elevator, escalator, and moving walkway systems
- Specification writing and procurement guidance
- Independent system audits and inspections
- Accident investigation and root-cause analysis
- Expert witnessing and litigation support
- Code compliance verification under ASME A17.1
His work supports elevator companies, building owners, engineers, legal professionals, and regulatory bodies seeking clarity, safety, and compliance in complex environments.
Commitment to safety, education, and industry advancement
David's mission extends beyond consulting. He is deeply committed to advancing safety standards by collaborating with engineers, mentoring apprentices, and identifying latent defects that can compromise system performance or public safety. Under his leadership, Lift Systems International focuses on:
- Enhancing system reliability and operational efficiency
- Strict compliance with applicable codes and standards
- Promoting professional training and education
- Supporting meaningful regulatory reform
This approach allows clients to not only meet requirements but exceed them — creating safer environments for riders and professionals alike.
Industry leadership & thought advocacy
In February 2026, David's article "Why Elevator Safety Standards Need a Complete Overhaul" was published in Elevator World, the premier publication for the global vertical transportation industry.
Drawing on 35+ years of experience — including over two decades as a QEI-certified inspector — he highlights systemic gaps in current regulations: inadequate preventive maintenance requirements, overburdened technicians, and the lack of consistent federal oversight.
With elevators moving approximately 325 million passengers every day in the United States, David advocates for stronger enforcement and universal safety standards that better protect the public and maintenance professionals.
Our promise
We deliver independent, safety-focused solutions tailored to each client. Whether supporting new construction, evaluating existing systems, investigating incidents, or providing expert testimony, our work is grounded in integrity, experience, and a commitment to advancing the industry — building a safer, more efficient future for vertical transportation worldwide.
Partner with an independent elevator authority
Trusted when accuracy, credibility, and protection matter most. Your first consultation is free.