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Senior Consultant at Golder AssociatesMr. Berry has been an engineer for over 25 years. His work is focused on geotechnical engineering. He has worked on foundations for buildings, highways, runways, dams, levees, and utility-related projects. Mr. Berry is a member of the American Society of Civil Engineers’ St. Louis Geotechnical Subcommittee. He earned his B.S. degree in Civil Engineering from North Carolina State University and his M.S. degree in Geotechnical Engineering from Virginia Polytechnic Institute and State University. He is also an adjunct professor at the Washington University in St. Louis and University of Missouri – St. Louis Joint Engineering Program.

Principal with GZA GeoEnvironmental, Inc.Mr. Hanna is a licensed engineer in the Commonwealth of Pennsylvania, as well as the States of New Jersey and New York. He has been practicing geotechnical engineering for over 25 years with GZA GeoEnvironmental. Mr. Hanna graduated in 1979 from the University of Rochester with a B.S. degree in Biology/Geology. Following five years of consulting work as a geologist, he received an M.S. degree in Civil and Environmental Engineering from the University of Wisconsin-Madison in 1986. Since that time, Mr. Hanna has been responsible for data review, site investigation, engineering design, report preparation and construction monitoring for numerous geotechnical projects that include building foundations, bridge abutments and piers, dams, slopes and tunnels.

Senior Associate with Schnabel Engineering, Inc.Mr. Petersen has 25 years of experience in various aspects of geotechnical and geological engineering, including site investigations, geotechnical analyses, design recommendations, expert witness testimony and construction services for projects involving highways and railroads, and for commercial, industrial and residential facilities. He received his B.S. degree in Geology from Bowling Green State University, followed by a B.S.E. degree in Geological Engineering and an M.S. degree in Engineering Geology from Purdue University. Mr. Petersen has served on the Editorial Board for the GeoInstitute’s Geo-Strata magazine since 2006 and recently completed a term as chairman for the Delaware Valley GeoInstitute.

Mr. Sabanas is a professional engineer with nearly 30 years of progressive engineering experience and project management related to geotechnical analyses and investigations. He has represented engineering consulting firms named in the Engineering News Record (ENR) top 300 throughout his career. He has served as technical manager for numerous engineering/construction projects in the Philadelphia and tri-state area for the majority of his career. He has been responsible for managing, planning, and implementing site characterization explorations for geotechnical and environmental projects, as well as the completion of special inspections programs associated with these projects. His responsibilities also included technical supervision over laboratory operations along with maintaining the accreditation programs of several commercial soils and geosynthetics laboratories. Notable projects include the following: Philadelphia Convention Center Expansion, A.I. DuPont Hospital for Children Expansion, PPL Center Hockey Arena, and Philadelphia International Airport-Terminal F Expansion. Mr. Sabanas holds a BS degree in GeoMechanical Engineering from the University of Rochester and an MS degree in Civil Engineering from Drexel University. He has served as the chair of the Delaware Valley GeoInstitute (DVGI) Chapter of ASCE since 2013 and is the recipient of the 2009 Geotechnical Engineer of the Year award distinguished by the Philadelphia Section of ASCE. Mr. Sabanas maintains professional licensure in the states of New Jersey, Delaware, Maryland, and the Commonwealth of Pennsylvania.

Mr. Harmanos is a professional engineer with extensive experience in subsurface exploration, soil testing, infiltration testing, geosynthetics, and seismic and advanced analysis. His expertise includes commercial, industrial and institutional foundation design; retaining wall and steep slope design; sinkhole remediation; landfill design; site work; forensic engineering; LEED consulting; and construction quality control/assurance (CQA/QC). Mr. Harmanos is a graduate of Drexel University where he received both his BS and MS degrees in Civil Engineering (Geosynthetics and Geotechnical). Hillis-Carnes performs geotechnical engineering consulting and laboratory testing services. Its construction services include evaluation of bearing materials, inspection of pile driving, slope inclinometer installation and monitoring, and retaining wall construction observation.

Mr. Harmanos is a professional engineer with extensive experience in subsurface exploration, soil testing, infiltration testing, geosynthetics, and seismic and advanced analysis. His expertise includes commercial, industrial and institutional foundation design; retaining wall and steep slope design; sinkhole remediation; landfill design; site work; forensic engineering; LEED consulting; and construction quality control/assurance (CQA/QC). Mr. Harmanos is a graduate of Drexel University where he received both his BS and MS degrees in Civil Engineering (Geosynthetics and Geotechnical). Hillis-Carnes performs geotechnical engineering consulting and laboratory testing services. Its construction services include evaluation of bearing materials, inspection of pile driving, slope inclinometer installation and monitoring, and retaining wall construction observation.

Assistant Professor, Portland State University
Dr. Arash Khosravifar joined the Geotechnical Engineering Group in the Civil and Environmental Engineering Department at Portland State University (PSU) in December 2015. He teaches courses on soil mechanics, geotechnical design and geotechnical earthquake engineering. Prior to joining PSU, he worked for Fugro Consultants Inc. in California where he worked on seismic hazard studies for transportation projects (bridges) and energy developments (oil and gas, and offshore wind turbines). Dr. Khosravifar earned his Ph.D. degree from the University of California at Davis where he conducted research on analysis and design of piles in liquefied soils. Dr. Khosravifar is a registered civil engineer (PE) in California.

Assistant Professor, Portland State University
Dr. Arash Khosravifar joined the Geotechnical Engineering Group in the Civil and Environmental Engineering Department at Portland State University (PSU) in December 2015. He teaches courses on soil mechanics, geotechnical design and geotechnical earthquake engineering. Prior to joining PSU, he worked for Fugro Consultants Inc. in California where he worked on seismic hazard studies for transportation projects (bridges) and energy developments (oil and gas, and offshore wind turbines). Dr. Khosravifar earned his Ph.D. degree from the University of California at Davis where he conducted research on analysis and design of piles in liquefied soils. Dr. Khosravifar is a registered civil engineer (PE) in California.

Assistant Professor, Portland State University
Dr. Arash Khosravifar joined the Geotechnical Engineering Group in the Civil and Environmental Engineering Department at Portland State University (PSU) in December 2015. He teaches courses on soil mechanics, geotechnical design and geotechnical earthquake engineering. Prior to joining PSU, he worked for Fugro Consultants Inc. in California where he worked on seismic hazard studies for transportation projects (bridges) and energy developments (oil and gas, and offshore wind turbines). Dr. Khosravifar earned his Ph.D. degree from the University of California at Davis where he conducted research on analysis and design of piles in liquefied soils. Dr. Khosravifar is a registered civil engineer (PE) in California.

Assistant Professor, Portland State University
Dr. Arash Khosravifar joined the Geotechnical Engineering Group in the Civil and Environmental Engineering Department at Portland State University (PSU) in December 2015. He teaches courses on soil mechanics, geotechnical design and geotechnical earthquake engineering. Prior to joining PSU, he worked for Fugro Consultants Inc. in California where he worked on seismic hazard studies for transportation projects (bridges) and energy developments (oil and gas, and offshore wind turbines). Dr. Khosravifar earned his Ph.D. degree from the University of California at Davis where he conducted research on analysis and design of piles in liquefied soils. Dr. Khosravifar is a registered civil engineer (PE) in California.

Mr. Simpson founded Gradelta Engineering in 2020 with the intent to help clients better understand the combination of geotechnical and structural engineering that he has worked with for the past 20 years. He earned his B.S.C.E. and M.S.C.E. degrees from Georgia Institute of Technology. He currently provides engineering services to contractors and fellow engineers for earth structure pricing, along with the plans and calculations needed for construction. He frequently consults with clients regarding the optimal structure type and location on the construction site to minimize risk and maximize useable space. He also works in the education sector providing not just seminars such as this one, but also acting as a subject matter expert creating study guide and test prep content for the NCEES Professional Civil Engineer exam. Mr. Simpson has also worked with lawyers and insurance companies during forensic investigation and lawsuits surrounding retaining walls and slope failures. His hope is that through the instructional services that he currently provides, slopes will remain stable and retaining wall failure will be eliminated.

Mr. Simpson founded Gradelta Engineering in 2020 with the intent to help clients better understand the combination of geotechnical and structural engineering that he has worked with for the past 20 years. He earned his B.S.C.E. and M.S.C.E. degrees from Georgia Institute of Technology. He currently provides engineering services to contractors and fellow engineers for earth structure pricing, along with the plans and calculations needed for construction. He frequently consults with clients regarding the optimal structure type and location on the construction site to minimize risk and maximize useable space. He also works in the education sector providing not just seminars such as this one, but also acting as a subject matter expert creating study guide and test prep content for the NCEES Professional Civil Engineer exam. Mr. Simpson has also worked with lawyers and insurance companies during forensic investigation and lawsuits surrounding retaining walls and slope failures. His hope is that through the instructional services that he currently provides, slopes will remain stable and retaining wall failure will be eliminated.

Mr. Simpson founded Gradelta Engineering in 2020 with the intent to help clients better understand the combination of geotechnical and structural engineering that he has worked with for the past 20 years. He earned his B.S.C.E. and M.S.C.E. degrees from Georgia Institute of Technology. He currently provides engineering services to contractors and fellow engineers for earth structure pricing, along with the plans and calculations needed for construction. He frequently consults with clients regarding the optimal structure type and location on the construction site to minimize risk and maximize useable space. He also works in the education sector providing not just seminars such as this one, but also acting as a subject matter expert creating study guide and test prep content for the NCEES Professional Civil Engineer exam. Mr. Simpson has also worked with lawyers and insurance companies during forensic investigation and lawsuits surrounding retaining walls and slope failures. His hope is that through the instructional services that he currently provides, slopes will remain stable and retaining wall failure will be eliminated.