Our Team

Kent Diebolt

Kent Diebolt, FAPT

Founding Partner

Kent founded Vertical Access in 1992—pioneering the use of industrial rope access on buildings in the United States. He leads project teams and travels nationwide presenting to architecture and engineering firms, government agencies, and universities about the use of rope access in the restoration and maintenance processes of historic buildings. He has served as President of the Association for Preservation Technology International (APTI) from 2001 – 2003.

Contact Kent at kent @ vertical-access.com or 607-227-3366.

Kelly Streeter

Kelly Streeter, PE


Kelly is a licensed structural engineer and partner-in-charge of nondestructive evaluation and access consulting projects on buildings, bridges, and dams. She also leads the development of TPAS® documentation services. Kelly is chairperson for the American National Standards Institute (ANSI) Z359.9 subcommittee on Personal Equipment for Protection Against Falls. She is a frequent presenter at industry associations, a lecturer at graduate level historic preservation university programs, and a SPRAT certified Level III rope access supervisor.

Contact Kelly at kelly @ vertical-access.com or 917-749-0998.

Evan Kopelson

Evan Kopelson, AIC


Evan is an architectural conservator with over twenty years of experience in the documentation and investigation of historic buildings. He is partner-in-charge of teams performing existing condition surveys, in situ testing services, and the characterization of building materials and finishes on buildings, bridges, and dams. Evan oversees the production of all project reports and deliverables. Evan is a member of the ASTM Committee E06 on Performance of Buildings, and a SPRAT certified Level I rope access technician.

Patrick Capruso

Patrick Capruso


Patrick joined Vertical Access in 2016. Prior to Vertical Access, Patrick was employed at Boston Valley Terra Cotta as a production finisher, shaping clay for architectural ornamentation. Projects ranged from the restoration of historic landmarks to the manufacturing of abstract elements for contemporary design. His experience, skill and keen eye for recreating architectural ornaments translates into detailed technical documentation of building conditions at Vertical Access. In addition to on site field work, Patrick’s responsibilities include project coordination and preparation of final report deliverables. He is a SPRAT certified Level III rope access supervisor.

Daniel Gordeyeva


Daniel Gordeyeva joined Vertical Access in 2019. A tree climbing instructor with Cornell Outdoor Education, Daniel assists with AutoCAD and is a SPRAT certified Level II rope access technician. He graduated from Rensselaer Polytechnic Institute, majoring in Sustainability Studies and Economics. He has also served as a Back Country Steward with the New York State Department of Environmental Conservation and as an Operations and Maintenance Solar Electrician with ETM Solar works.

Andrew Broffman

Andrew Broffman


Andrew Broffman joined Vertical Access in 2019. Before joining the team he has worked at height in the Challenge Course industry for over 5 years, facilitating and performing maintenance/inspections on courses and zip lines. Andrew assists with AutoCAD and is a SPRAT certified Level II rope access technician. He graduated from Springfield College in Western Massachusetts majoring in Psychology and Adventure Education. He was also the Ropes Course Director at Camp Massasoit of the 2019 Season.

Marshall Sellers

Marshall Sellers, AIA


Marshall Sellers, a registered architect in New York, is branch manager of our New York City office. Marshall earned his Master of Architecture from the University of Louisiana and brings 13 years experience working in architecture offices in New York and Louisiana. A SPRAT Level I certified rope access technician, Marshall is fluent in Revit, BlueBeam, Newfoma, Fieldlens, AutoCAD and other software.

Tuli Kuckes


Tuli Kuckes has joined the firm as a SPRAT Certified Level II Rope Access Technician and Preservation Technician. He is a graduate of Skidmore College and the National Outdoor Leadership School, served as a High Ropes Course instructor, and has his Wilderness First Responder certification.

Lauren Ottersten


Lauren has been involved in industrial rope access and work at height in the NYC metro and surrounding areas since 2011. For seven years she worked for a contractor that specialized in rope access methods where she was involved with rigging, project planning and building inspections.

Since 2018 she was an industrial rope access specialist for several architectural and engineering firms, performing facade inspections using industrial rope access and other means, as requested. Inspections were primarily for compliance with New York City’s Facade Inspection Local Law 11 or Safety Program (FISP) regulations.  Lauren assisted with project management, budgets and report writing for facade inspections and repair campaigns.

Lauren has a BFA in Illustration from the Massachusetts College of Art and has studied anatomy drawing and painting as well as other methods. She is a SPRAT Level III rope access supervisor.

Matthew Kriedler

TPAS/CAD Manager/Technician

Matthew Kreidler has joined the firm as a SPRAT Certified Level 1 Rope Access Technician, and our new TPAS and CAD Manager.  He received his Masters in Architecture from the University at Buffalo and comes to the firm from Boston Valley Terra Cotta.

Judith E. Fagin, PMP

Business Development Manager

Judith E. Fagin, PMP, has joined the firm as Business Development Manager. Judy has spent the majority of her career in project development and implementation and has worked in the public, private, and nonprofit sectors. She has a Bachelor of Arts in art history from Tulane University, a Bachelor of Architecture from the University of Miami, and did graduate work in Historic Preservation at Columbia University. She recently received her Masters in Public Administration from the Harvard Kennedy School.