Profession Consulting Services since 1972

OBA Executive Summary
O'Brien & Associates, Inc. is a certified Women's Business Enterprise (WBE).

O’Brien & Associates, Inc. has been providing quality professional services since 1972 in the areas of:

  • Geotechnical Engineering
  • Material Testing and Inspection
  • Pavement Evaluation
  • Environmental Services
  • Laboratory Testing
O'Brien & Associates, Inc. has a staff of managing personnel including a registered professional engineer, geologist, project manager, technicians, and an IDOT Level 1, 2 and 3 QA/QC qualified laboratory manager.  We provide geotechnical services in the areas of soils and foundation engineering, foundation design recommendations, evaluation of earth structures and retention structures, earth stabilization and ground improvement, dewatering and groundwater control, laboratory testing, material testing, pavement investigation, evaluation and thickness design and Phase I and II environmental services  Our laboratory manager has participated in a variety of certification programs, including those sponsored by American Concrete Institute (ACI) and Illinois Department of Transportation (IDOT). 

O'Brien & Associates, Inc.'s materials testing laboratory is equipped with industry approved, certified testing equipment.  We provide a full range of engineering testing.  OBA's testing equipment is routinely calibrated to national standards. All tests are performed in accordance with standards developed by the American Society for Testing and Materials (ASTM) and Association of American State Highway and Transportation Officials (AASHTO).  Our laboratory is inspected and certified by IDOT and AASHTO on an annual basis.

O'Brien & Associates, Inc.'s geotechnical engineering activities are supported by a variety of software including Apile, and AutoCADTM,.  Slope stability analyses are performed using the XSTABL slope stability program.  OBA's boring logs and soil profiles are prepared on appropriate computer media for inclusion on the plan sheets.  Our location diagrams and soil profiles are also routinely prepared on our AutoCADTM system for direct transfer onto project plans.  We also have the capability to convert files to the Industry Standard Electronic ADOBE format.






  • City of Chicago Woman Owned Business (WBE)


  • State of Illinois CMS (WBE)

  • Prequalified with Illinois Department of Transportation (IDOT)


OBA Transportation

Project Highlights:

  • CTA
  • PACE
  • CDOA
  • OMP
  • O’Hare 21
  • CDOT
  • CDWM
  • IDOT
  • CPS
  • PBC