Patrick J. Welch
Based in Philadelphia, Pennsylvania, Pat is responsible for the management of VTX and has more than 18 years of experience in the design of elevator, escalator, and moving walk systems, as well as material lifts. He also is experienced in the design and specification of escalators for unique installations and operating conditions. Pat has led in the planning, design, and construction administration for some of the largest public vertical transportation projects in the U.S.
Since 1996, he has been a member of the ASME A17.1 Escalator and Moving Walk and Existing Installation Maintenance and Repair subcommittees. Pat also is chair emeritus for the APTA Escalator Technical Forum (EETF) and chair of all APTA escalator and elevator design guidelines working groups.
David P. Hansen, CEI
Senior Vice President
Based in Philadelphia, Pennsylvania, Dave has been with VTX since our founding in 2000. He is responsible for all aspects of vertical transportation consulting for the Philadelphia region. He has expertise in the design, modernization, maintenance, safety, acceptance inspections, and project management for elevators, escalators, moving walks, dumbwaiters, wheel chair lifts, and related people moving equipment.
Dave is a member and former board member of the American Subcontractors Association of the Delaware Valley. He also is a member of the General Building Contractors Association, the Philadelphia Chapter of the American Institute of Architects, and the Mid-Atlantic Association of Elevator Contractors.
Kenneth G. Hamby, CEI
Ken has been with VTX since 2002. Based in Baltimore, Maryland, he has extensive experience in the design, modernization, maintenance, and project management of new and existing elevator, escalator, and moving walk systems. He develops standards for elevator and escalator designs, provides solutions for upgrading existing installations, conducts in-depth safety inspections to verify conformance with codes and special requirements, and assists clients and designers with the interpretation of official codes.
His more than 20 years of experience in the vertical transportation industry includes developing and managing commercial and technical support services for major suppliers to the industry. His direct industry experience is complemented by his expertise in designing and developing aerospace research systems and hardware for the National Aeronautics Space Administration.
Ken invented the Parametricoder in response to our clients’ need to benchmark and analyze escalator and moving walk performance. This device has been utilized in thousands of tests since 2005.
Anthony DeFrancesco, CEI
Based in Phoenix, Arizona, Tony has been with VTX since 2001 and is responsible for providing direct project support on key existing contracts with the City of Phoenix and the development of new business opportunities both locally and in the southwestern U.S. His responsibilities include project management, design solution development, contract document development, performing detailed installation and equipment inspections, reviewing contractual submittals, and evaluating design change orders.
He has more than 15 years of experience in design, modernization, maintenance, and project management for new and existing elevator, escalator, and moving walk systems, as well as dumbwaiters, material lifts, and related equipment. Tony conducts in-depth safety inspections to assure that code and special requirements are fulfilled, such as the American with Disabilities Act. He also performs construction, investigative, and acceptance inspections.
Tony holds a bachelor of science in mechanical engineering from Temple University. He is a certified elevator inspector (C.E.I.) and member of the National Association of Elevator Safety Authorities.
Robert C. Keller, CEI
Based in New York City since 2001, Bob is responsible for developing standards for design and solutions for existing elevator and escalator installations; conducting in-depth safety inspections to meet code and special requirements; and performing construction, investigative, and acceptance inspections. He also assists clients and designers in official code interpretations.
He has more than 20 years of experience and holds a bachelor of science in marketing and a master of business in administration from Farleigh Dickinson University. He also earned a master of professional studies in industrial psychology from the New York Institute of Technology and is a licensed qualified elevator inspector by the National Association of Elevator Safety Authorities International.
Sean Steiner, CEI
Manager of Technical Center
Sean is based in Philadelphia, Pennsylvania. He is responsible for developing and overseeing standards for elevator and escalator designs, providing solutions for upgrading existing installations, and conducting in-depth safety inspections to verify conformance with codes. Sean also performs construction, investigative, and acceptance inspections. He has more than 16 years of experience and holds a bachelor of arts degree in applied physics with a concentration in mechanical engineering and mathematics from Richard Stockton College of New Jersey. Sean is a member of the National Association of Elevator Safety Authorities International and ASME and also is a licensed qualified elevator inspector.