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Testing Service Corporation Service Is Our Middle Name
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Geotechnical/Environmental Drilling Services We Go Where Others Cannot



"Service is Our Middle Name"

Testing Service Corporation (TSC) is a professional firm providing a variety of services including:

  • Geotechnical Engineering
  • Construction Materials Engineering & Testing
  • Environmental Consulting
  • Contract Drilling
These services are complimented by the internal ownership and operation of over a dozen drill rigs and a full service geotechnical laboratory.


Organized in 1954 as an Indiana corporation, TSC has operated in the Greater Chicago area since 1956. Corporate headquarters are located in Carol Stream, Illinois.


Our staff includes experienced engineers, geologists, technicians and drilling personnel dedicated to client satisfaction. TSC has developed a reputation for providing high quality services in a responsive manner and at a reasonable cost.

How We Might Relate To Your Project

Soil borings are made for construction projects and environmental studies. Soil borings tell us about the composition of the soil and help you make building design decisions. These projects and studies sometimes require other drilling related activities including rock coring, the installation of monitoring wells, piezometers, lysimeters, gas probes and inclinometers.

What if I require field testing?

Depending on the project, you might require field and laboratory testing for soils, concrete and bituminous pavement. Through these services we generate engineering reports for foundation design, hydrogeological, environmental studies based on the field and laboratory results. These help give factual insights to clients and inform construction decisions.

Do you offer other services?

Sometimes you might also need floor flatness checks, welding inspection, phase 1 or 2 environmental site assessments, or asbestos building surveys. Well, we do that too!

How fast will I get my report?

Besides good ole' fashioned paper, TSC has been continuously working to incorporate technology into our systems to make the time between testing and reporting smaller and smaller. From field technicians entering data on tablets to laboratory data being processed through our own finely tuned software, everything is being optimized to make things faster so you don't have to wait longer than you should for your report.

We even have our own document delivery system that will notify you when you have a document from us. It allows you to not only get reports faster, but even let's you look back on previous projects.

What does that mean for you?

All of these technological improvements lead to faster reporting delivered right to your email. We also offer other delivery methods if something would be more convenient for you.

When choosing TSC, project management becomes easier as your geotechnical engineering, materials testing, environmental, and contract drilling needs are all met in one place. That way you don't have to go hunting around for a bunch of different companies to satisfy your requirements. Whether you have a large building in Chicago or a small job out in the middle of nowhere, TSC has the staff and drive to get it done.


Geotechnical Engineering Services for Illinois

Geotechnical Engineering

Subsurface Exploration and Engineering Analysis
Geotechnical and Environmental Drilling Services for Illinois

Geotechnical/Environmental Drilling Services

We Go Where Others Cannot
Construction Materials Field Testing for Illinois

Construction Materials Testing

Field Testing and Observation for All Types of Construction Projects
Environmental Consulting and Assessment for Illinois

Environmental Consulting/Assessment Services

A Tradition of Service and Reliability


Through our 67 year history, TSC has worked on a wide-ranging number of projects. This varied expertise is one of the main reasons for choosing TSC. Here are just some of the construction projects we've been a part of:



Gundersen Carol Stream, Illinois

457 E. Gundersen Drive
Carol Stream, Illinois 60188
Phone: 630-462-2600
Contact: Kathy Schimick

Environmental Services

360 South Main Pl.
Carol Stream, Illinois 60188
Phone: 630-784-4005
Contact: Dave Hurst

DeKalb, Illinois

650 N. Peace Road Suite D
DeKalb, IL 60115
Phone: 815-748-2100
Contact: Steve Koester, P.E.

Gurnee, Illinois

1350 Tri State Parkway, Unit 122
Gurnee, IL 60031
Phone: 847-249-6040
Contact: Megan Conway, P.E.

Rockford, Illinois

2235 23rd Avenue
Rockford, Illinois 61104
Phone: 815-394-2562
Contact: Jeff Martin, P.E

Shorewood, Illinois

203 Earl Rd., Unit A
Shorewood, IL 60404
Phone: 815-744-1510
Contact: Daniel Campbell, P.E.

Corporate Carol Stream, Illinois

360 South Main Pl.
Carol Stream, Illinois 60188
Phone: 630-462-2600
Contact: Kathy Schimick