Our Team 2017-06-07T10:07:35+00:00

H&A personnel consists of registered geotechnical and civil engineers, certified engineering geologists, laboratory and field engineering technicians, deputy inspectors, experienced technical support staff and other State licensed specialty professional/geotechnical subconsultants and subcontractors.

ENGINEERING/GEOLOGY PROFESSIONALS


David T. Hamilton, PE, GE

President/Principal Geotechnical Engineer
Mr. David T. Hamilton has over 22 years of broad engineering experience involving geotechnical and geological investigations for industrial, infrastructure, public works, commercial, and private projects. Mr. Hamilton taught Soil Mechanics and Foundations as well as Solid Waste Engineering in both the undergraduate and graduate civil engineering programs at Loyola Marymount University in 2002 and 2003. He has served on the California Geotechnical Engineering Association Board of Directors for 10 years. He has extensive experience in shallow and deep foundation design, slope stability analyses, pavement design, landfill design, and construction testing and inspection.

  • MS Civil/Geotechnical Engineering, University of California, Berkeley, 1995
  • BS Civil Engineering, Loyola Marymount University, Los Angeles, 1994

Richard A. Martin, PE, GE

Principal Geotechnical Engineer
Over 50 years of broad geotechnical experience involving geotechnical engineering and rock mechanics, foundation design, hillside construction, soils and rock testing, and land stabilization engineering. He has extensive experience in shallow and deep foundation design, slope stability analyses, pavement design and construction testing and inspection. Registered Civil Engineer in California, Nevada, Washington and Colorado. CalGeo and ASCE Life Member.

  • MS, Mining Engineering, Missouri School of Mines, Rolla, 1966
  • BS, Mining Engineering, Missouri School of Mines, Rolla, 1964


Eirik F. Haenshcke, PG, CEG

Senior Engineering Geologist
Over 30 years of experience in applied engineering geology practice, involving preliminary site investigations for infrastructure, public works construction, commercial, residential projects; fault rupture hazard investigations, identification and assessment of active landslides, evaluation/remediation of post-construction distress conditions, and evaluation of site hydrologic conditions. Services include field assessment of site geologic conditions, fault trench studies, logging exploratory excavations, downhole geologic logging of large diameter borings, and aerial photograph interpretation. Mr. Haenschke has provided expert witness testimony related to earthquake effects, ground water seepage and other geologic matters. Member AEG.

  • BS, Engineering Geology, University of California, Los Angeles, 1985
  • MS, Geology, California State University, Los Angeles, 1996

Michael F. Mills, PG, CEG, CHG

Senior Engineering Geologist/ Hydrogeologist
Over 40 years offered a wide range of engineering-geological services to infrastructure, industrial, commercial and large-scale residential developers, single-family residential builders, and governmental agencies. He possesses well-proven ability to direct and complete a broad range of engineering-geological projects by applying a variety of geological disciplines such as geomorphology, structural geology, rock and soil stratigraphy, regional and local tectonic analyses, and focused research. His purpose is to provide professional and responsive service to his clients to maximize the project from a geological perspective in a manner that is consistent with current professional standards of practice, applicable codes, and public safety. Mr. Mills has authored eight technical articles on southern California fault investigations including the Newport-Inglewood, Signal Hills, Palos Verdes.

  • Geological Sciences, University of Southern California, Los Angeles
  • History and Economics, Claremont Men’s College, Claremont


Ernesto Vicente, PhD, PE, GE

Principal Geotechnical Engineer
Dr. Ernesto Vicente has over 35 years of experience in geotechnical and earthquake engineering through a wide spectrum of insfrastructure, industrial, heavy foundation, coastal development, commercial, and environmental projects in the United States, Latin America, Southeast Asia and the Middle E ast. He is a registered California Professional Engineer (PE) and Geotechnical Engineer (GE).

  • PhD, Civil/Geotechnical Engineering, Rensselaer Polytechnic Institute, Troy, 1983
  • MS, Civil/Geotechnical Engineering, Rensselaer Polytechnic Institute, Troy, 1978
  • Hydroelectric Developments Diploma, Universidad Nacional, Buenos Aires, Argentina, 1973
  • Civil Engineer Degree, Universidad Nacional, Cordoba, Argentina, 1972

Amir Khalaj, BS

Senior Project Engineer
Over thirty years of comprehensive geotechnical experience involving engineering analysis and design, public works infrastructure, industrial facilities, commercial/retail and residential geotechnical investigations, shallow and deep foundation design and hillside construction. He has played an integral role in planning and execution of geotechnical investigations, coordination of field explorations, sampling and logging of borings, laboratory and construction testing. Certifications: Los Angeles County Grading Deputy, Nuclear-Gage Certified.

  • BS, Civil Engineering, California State University, Fresno, 1979


Lee Heng, BS, EIT

Staff Engineer
Comprehensive geotechnical engineering experience involving public works, industrial facilities, commercial/retail and residential geotechnical investigations and foundation design. She has played an integral role in planning and execution of geotechnical investigations, coordination of field explorations, sampling and logging of borings, laboratory testing, and analysis.

  • BS, Civil Engineering, California State University Long Beach, 2015
  • Civil Engineering, California State Fullerton, Currently Pursuing MS

Brendan Miller, BS, EIT

Staff Engineer
Comprehensive geotechnical engineering experience involving public works and infrastructure, industrial facilities, commercial/retail and residential geotechnical investigations and foundation design. He has played an integral role in planning and execution of geotechnical investigations, coordination of field explorations, sampling and logging of borings, laboratory testing, and analysis. Engineer-In-Training (EIT) and Nuclear-gage certified.

  • BS, Civil Engineering, California State University Long Beach, 2013


Tyler Castellaw, BS, GIT

Staff Geologist
Geotechnical and geology experience involving hillside residential geotechnical investigations and foundation design, including fault studies. He has played an integral role in planning and execution of geotechnical investigations, coordination of field explorations, sampling and logging of borings, laboratory testing and analysis. Geologist in training certificate (GIT).

  • BS, Geology, California State University Long Beach, 2015
  • Geology, California State University, Los Angeles, Currently Pursuing MS

Anthony J. Borges, BS

Staff Geologist & Geotechnical Testing
Anthony is experienced in Geotechnical and Materials Laboratory Testing and is certified in X-ray diffractometry. He has played an integral role in planning and execution of geotechnical investigations, coordination of field explorations, sampling and logging of borings, laboratory testing, and analysis.

  • BS, Geology, California State University Long Beach, 2016

ENGINEERING/GEOLOGY TECHNICIANS


Brent Fredriks

Field/Laboratory Technician
Field and geotechnical laboratory engineering technician performing geotechnical construction observation and testing. Nuclear-Gage Certified.

Diego Quiñonez

Field/Laboratory Technician
Field and geotechnical laboratory engineering technician performing geotechnical construction observation and testing. Nuclear-Gage Certified.

ADMINISTRATIVE/BUSINESS PERSONNEL


Rindy Mahoney

Office Manager/Central Dispatch
Corporate and human resources, billing and field testing personnel dispatch, maintaining and updating the company radioactive quality control manual, CCRL and AMRL testing materials, business development, and employee management.

Cyndi Radov

Business Manager
Manages the business aspects of the office including tracking project budgets, schedules, and client relations. Oversees accounts payable, accounts receivable and collections. Assists with billing, field testing personnel dispatch and employee management.

Joyce Martin

Administrative Assistant
More than 20 years in the geotechnical industry as corporate and administrative assistant. Performs office and client relations, word processing and maintains corporate and office files.

Sally Neiser

Business Development Manager
Specializes in building Infrastructure, Industrial, Public Works and Commercial/Residential Cliental by locating, developing, defining, negotiating, and closing business relationships.