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We Go Where Others Cannot...


One Place For Any Case
Geotechnical/Environmental Drilling slideshow picture for Illinois, Indiana, Wisconsin

Using soil borings and lab analysis, we determine soil composition, so you don't wind up with surprises when you go to build.


Once you start building, we can test the concrete, asphalt, steel, or soil to make sure that it will hold up to your project specifications.


Assess the current environmental health and identify potential risks of a property.

Why Us?

  • Service

    At TSC, we make service our #1 priority. Our engineers and staff are happy to answer any questions you might have throughout the course of your project, and give recommendations on how to best proceed given different scenarios.

    It's not a question of if things will come up, but who you'll have to talk to when they do, and we're committed to being there when you need us.

    Here you're not just another assignment.

  • Experience

    We've been doing this a long time, 70 years to be precise. With the number of projects we've seen through, we have a treasure trove of real-world experience that has been passed down through the generations of TSC employees, and that can be a real asset to our clients.

  • Reliability

    Literally thousands of companies over tens of thousands of jobs have relied on us to get the job done right. The amount of work we've been fortunate enough to have has been a testament to our reliability.

History Of TSC

Organized in 1954 as an Indiana corporation.
Started operating in the Greater Chicago Area
Gundersen Location Built
Corporate Headquarters Established
Location Opened In Gurnee, Illinois
Location Opened In Shorewood, Illinois
Location Opened In DeKalb, Illinois
Location Opened In Rockford, Illinois

Our Team

Jack Massa - President Steve Koester - Geotechnical Engineer Mike Machalinski - Geotechnical Engineer Megan Conway - Professional Engineer Brian Walker - Environmental Jeff Martinka - Professional Engineer Jeff Martin - Professional Engineer Sam Patrick - Professional Engineer Jeff Schmitz - Professional Engineer Laura Seaborg - Professional Engineer Alfredo Bermudez - Geotechnical Engineer Tim Peceniak - Geotechnical Engineer Tim Muszynsky - Professional Engineer Heather Nilles - Environmental Trevor Messacar

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.

The majority of our staff sticks around a long time, which means you don't have to deal with constantly changing project managers. Many of our clients get to work with the same engineers again and again.

Importance of Testing

Soil borings are made for pre-construction projects and environmental studies. Soil borings can tell us about the composition of the soil, hazards that might be lurking in it, and can 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.

Additionally, when you go to build, your project must meet certain material requirements such as concrete compressive strength and other integrity specifications that are important to ensuring that your structure will stand the test of time. Whether you're building a multi-story high-rise, a winding road, or a single family home, we can make sure that the standards of the materials are being met.

Project Reporting

The TSC Document System

Getting up-to-date information on your projects is critical to timely construction decisions. With that in mind, we developed a specialized document delivery system that gets you the latest information when you need it and from wherever you are. You'll get email alerts when we publish reports and we're even able to distribute daily field reports to other involved parties with fine-grained control.

The TSC Document system also gives you a historical view of all of the different projects that you've worked on with us, so if you're looking for something a year from now, it is only a few clicks away.

Digital Daily Field Reports

Additionally, we've moved to digital Daily Field Reports for our clients in regards to Construction Materials Testing, so that we can deliver them significantly faster and include even more detailed information.

TSC Document System


Geotechnical Engineering Services for Illinois

Geotechnical Engineering

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

Geotechnical/Environmental Drilling Services

Pre-Construction Soil Testing Services
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 70 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: 630-784-4012
Contact: Brian Walker P.G.

DeKalb, Illinois

650 N. Peace Road Suite D
DeKalb, IL 60115
Phone: 815-748-2100
Contact: Tim Muszynsky, 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: Laura Seaborg, P.E.

Corporate Carol Stream, Illinois

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