Mr. Axten, co-founder of American Geotechnical, has an extensive qualified and skilled background as a civil/geotechnical engineer. His professional practice includes the fields of soil engineering, geology, foundation engineering, structural engineering, materials engineering, and hydrology. His technical responsibilities have included all phases of logistics, cost estimating, drilling, sampling, field and laboratory testing, engineering analyses, development of design criteria and construction recommendations, and resident engineering. Consulting has included the development of design criteria for major developments including residential, commercial, industrial and utility projects.

     Projects include: hillside residential developments, urban redevelopment, oil storage and water tanks, pipelines, bridges, multiplate arch structures, waterfront structures, storm drains, reservoir embankments, sewage disposal systems, as well as one of the largest deep space instrumentation facilities (230 foot diameter tracking antenna) ever proposed by NASA.

     Mr. Marsh has been a part of American Geotechnical's team of professionals since 1988. Currently he is the Office Manager and Principal Engineer for the San Diego and Las Vegas offices. During the course of his professional career he has become an accomplished leader in the fields of geotechnical, civil and forensic engineering. He has been involved with projects throughout southwestern United States. Projects have included hillside developments, deep fill, expansive soil and other sensitive soil sites, Infrastructure design and construction consulting, liquefaction and dynamic soil evaluations, slope stability and landslide evaluation and stabilization, construction material corrosion assessments, concrete problem evaluations and moisture intrusion studies, among others.

     Because of his expertise in geotechnical engineering and other related subjects, Mr. Marsh frequently gives educational presentations for both public and private groups and serves as a professional expert for dispute resolution.

     Mr. Day has been a Chief Engineer with American Geotechnical for the past 24 years. He is one of the most published geotechnical professionals among living authors. He has authored five textbooks and co-authored two additional books, in addition to hundreds of technical articles. His experience is widely varied and utilizes the best of two worlds; academic and professional consulting. As a graduate with the Engineer Degree from MIT and other advanced graduate degrees, Mr. Day is ideally suited to apply advanced theoretical geotechnical engineering to real situations. Examples of research projects include surficial stability of clay slopes, deep sea drilling project testing of oceanic sediments (important because some properties apply to geotechnical formations commonly encountered in today's developments), and liquefaction of reinforced sand.

     Mr. Day's consulting experience has been utilized in evaluation of slope stability, landslide analysis, commercial and residential development, foundation design and other areas.

     Specific geotechnical evaluations have included design of earth retaining structures, landslide stabilization, geotechnical distress investigations, as well as mass grading for hillside developments.

     Arumugam Alvappillai "Alva", Principal Engineer, Partner Alva has been a key professional at American Geotechnical since 1993. As a Senior Engineer, Mr. Alvappillai's primary responsibilities include diagnosing soil and foundation problems on a wide range of projects, consulting on new commercial development projects, as well as, structural design, and structural forensic evaluations. Other responsibilities include project management, planning of field investigations, analytical and computer analysis, and report writing.

     His professional and academic background, with a Ph.D. in Geotechnical Engineering has proven to be an invaluable asset while managing and working on various geotechnical-engineering projects in Southern California. In addition to the above, he has experience in structural analysis and design, particularly in the area of foundation engineering. Geotechnical experience includes projects related to settlement and expansive soil, foundation engineering, slope stability, landslide and earthquake engineering. He has experience and knowledge of the latest computer methods of analyzing complex problems using numerical methods. He also designed various structural systems such as mat slabs, pile foundations, and tieback systems for slope stability.

     Dr. Huang began his professional career more than 24 years ago and has been with American Geotechnical since 1994. Dr. Huang received his Ph.D. degree from Northwestern University in 1993. His primary duties were focused on site characterization, analysis & interpretation of subsurface data, static & dynamic design and analysis of shallow and deep foundations, pavement design, liquefaction analysis, as well as earth retaining & stabilizing structures. He also performed field investigation testing & borehole logging and also investigated landslide & slope stability problems. His current duties includes client contact, proposal preparation, planning geotechnical and forensic investigations, engineering data analyses, foundation design and recommendations, project management, as well as report writing. Dr. Huang has involved various types of construction projects including new construction, grading, landslide stabilization, slope repair, etc.

     Dr. Huang also has more than twelve years of geotechnical forensic investigation experience. He has worked on various construction litigation projects for lawyers, homeowner associations, insurance companies, financial institutions, and major developers in California. He has investigated various foundation problems, and designed treatments including shallow and deep foundation repairs, retaining structures stabilizations, landslide/slope stabilizations, groundwater problems, and pavement rehabilitation, etc.

     Mr. Hull performs a variety of geologic field and office duties as Chief Engineering Geologist based out of our corporate office located in Yorba Linda. The bulk of his quarter-century consulting career has involved completion of significant and high-profile development-related geotechnical engineering and environmental projects for clients throughout southern and central California. His work experience has included performance of geotechnical and engineering geologic hazard investigations, mass grading observation and control, preparation of technical reports and completion of construction defect litigation support activities for many projects within the western United States.

     Some specific duties include literature and historical stereo-photo reviews, geologic mapping, large-scale landslide evaluation, fault studies, drilling/trenching, down-hole logging, cross-section preparation, soil and groundwater sampling, floor-level surveys, density testing, installation of crib/shoring walls, caissons, tiebacks, rock-bolts, boulder-scape walls, cement-treated fill soils, pressure grouting, vertical wick-drains, slope inclinometers, tilt meters, groundwater and piezometer wells. Mr. Hull is duly qualified as an environmental professional. He has considerable experience performing Phase I & Phase II hazardous soil and groundwater investigations, monitoring well installation and technical reporting preparation.

     Ms. Glick has over 30 years of experience in engineering geology, groundwater hydrology, basin hydrology, environmental management, discharge permitting and regulatory compliance, earthquake engineering, civil and geotechnical engineering, and construction technology in private industry and with the federal government. She has managed and performed detailed assessments for the development and sustainable use of groundwater resources including: private and public water well design and construction oversight; well field and basin expansion assessments for Federal properties; and watershed basin hydrology for runoff assessments. She has also provided basin hydrology assessments for mitigation of coastal erosion and flood hazards due to wildfire depletion of hillside vegetation and supported civil engineering design of seawalls, breakwaters, stream embankments, and rigid and flexible debris retention structures.

     Specific environmental projects have included: ground water basin hydrogeologic modeling for extended development purposes (commercial, residential, and military use), subsurface characterization investigations, ground water characterization studies, determining soil and hydraulic characteristics of aquifer materials, contaminant migration assessments, sensitive receptor risk assessments, professional oversight during facility closures, and remedial feasibility studies. Ms. Glick has also been responsible for design, installation, and operation/maintenance of in-situ remedial systems including: nutrient injection biodegradation, passive bioventing, ground water extraction, vapor extraction, air-sparging/vapor extraction,and ORC injection projects.

     Mr. Jones has 25 years of construction, inspection, and management experience and 17 years of geotechnical QA/QC experience performing as Operations Manager, Project Manager, Field Services Manager, Laboratory Manager, and Inspector of Record, Radiation Safety Officer. Specific responsibilities include Laboratory and Field Services over-site; assures compliance with CDPH, AASHTO, AMRL, CCRL, DSA, and Caltrans accreditations; provides training, supervision and review of laboratory and field staff, client interaction, proposal preparation, and cost estimates