RA provides high-quality geotechnical engineering and related technical services. Each of our clients receives personal attention and solutions tailored to their needs, no matter the size or scope of the project. 

Our firm was founded in 1991 as a sole proprietorship by Robert (Bob) Alperstein, P.E., D.GE. Since then the firm has expanded to meet the demands of our growing clientele. Today the firm is led by our team of partners and associates dedicated to delivering our clients cost-effective yet world class service. 


Nidal AbiSaab, P.E. joined the firm in 2007. He presents a more than 15 years of Geotechnical Engineering experience. His experience includes design of foundation and support of excavation design, numerical modeling, and instrumentation. Mr. AbiSaab completed a bachelors in civil engineering at the Lebanese American University and a masters at The Johns Hopkins University.

Jane Raba, P.E. directs the structural engineering department within RA and founded the Support-of-Excavation Division. Prior to joining RA, she held the engineering license for the Electric Distribution Engineering Structures Department of Consolidated Edison where Ms. Raba developed a long term structural asset management program for the maintenance and upkeep of existing underground structures. She has a masters and bachelors in civil engineering from The Johns Hopkins University. Ms. Raba has nearly two decades of experience in the field of structural forensics, historic preservation, and soil structure interaction and she has served on the Board of the ASCE Metropolitan Section Geotechnical Group.


Joseph Caciola, P.E. joined the firm in 2010 and became an Associate in 2018. Mr. Caciola received a Bachelor of Science and Master of Science in Civil Engineering from Manhattan College. He is a licensed engineer in New York and is currently an active member of the Metropolitan Section of ASCE. 


Founder & Consultant: Bob Alperstein, P.E., D.GE. founded RA during the recession of 1991.  He had worked for 27 years in several geotechnical consulting firms before founding the firm.  Mr. Alperstein had been a vice president or held ownership positions in those firms for about 15 years and developed a professional reputation for providing quality and timely geotechnical engineering services and personal integrity.  He has published over a dozen articles relating to practical aspects of geotechnical engineering. Mr. Alperstein completed a bachelors of civil engineering at Cooper Union and a masters of geotechnical engineering at MIT.

Consultant: Walter Papp, Ph.D., P.E. joined the firm in 2007 and became a partner in 2008. He presents more than two decades of Geotechnical Engineering experience. He provides practical solutions to field related foundation problems and has significant geotechnical laboratory testing experience. He is a member of professional societies and has published several professional papers. Mr. Papp completed a bachelors in civil engineering and a PhD in geotechnical engineering at Rutgers University.