Lift Systems International LLC was founded with one clear mission: to improve safety, efficiency, and accountability across the vertical transportation industry. With decades of hands-on experience and a deep commitment to compliance and education, our firm provides independent, expert consulting services for elevators, escalators, and moving walkways across the United States and internationally.
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 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 Lift Systems International 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 services 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.
David’s mission extends beyond consulting. He is deeply committed to advancing safety standards throughout the industry 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
Ensuring 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.
David is also an active industry advocate and thought leader. In February 2026, his article, “Why Elevator Safety Standards Need a Complete Overhaul,” was published in Elevator World magazine, the premier publication for the global vertical transportation industry.
In the article, David draws on more than 35 years of experience—including over two decades as a QEI-certified inspector—to highlight systemic gaps in current safety regulations. He addresses critical issues such as inadequate preventive maintenance requirements, overburdened technicians, and the lack of consistent federal oversight.
With the elevator industry moving approximately 325 million passengers every day in the United States alone, David advocates for stronger enforcement, universal safety standards, and reforms that better protect both the public and maintenance professionals.
At Lift Systems International LLC, we deliver independent, safety-focused solutions tailored to each client’s needs. 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.
Through expertise, education, and leadership, we strive to build a safer and more efficient future for vertical transportation worldwide.