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

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

How We Might Relate To Your Project

Soil borings are made for construction projects and environmental studies. These projects and studies sometimes require other drilling related activities including rock coring, the installation of monitoring wells, piezometers, lysimeters, gas probes and inclinometers. Field and laboratory testing are performed for soils, concrete and bituminous pavement. Engineering reports for foundation design, and hydrogeological and environmental studies are prepared utilizing the results of field and laboratory activities.


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.


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.


Geotechnical Engineering

Subsurface Exploration and Engineering Analysis

Drilling Services

We Go Where Others Cannot

Construction Materials Testing

Field Testing and Observation for All Types of Construction Projects

Environmental Consulting Services

A Tradition of Service and Reliability


Office Locations

Gundersen Carol Stream Office

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 Office

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

Gurnee Office

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

Rockford Office

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

Shorewood Office

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

Corporate Carol Stream Office

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