The proper selection, quality, and workmanship of construction materials ensure that today’s buildings and infrastructure performs well into the future. To meet this goal, GSG offers comprehensive construction material testing services by our staff of licensed professional engineers and Illinois Department of Transportation certified engineering technicians.

As a testament to the quality of our service and depth of our experience, GSG is one of only several companies prequalified by the Illinois Department of Transportation for QA HMA & Aggregate and QA PCC & Aggregate. With these prestigious qualifications, we provide testing services for countless projects each year, including some of the region’s most critical infrastructure.

We maintain a staff of professional and dedicated material specialists dedicated to successful project execution. By making personal commitment a key attribute of our company culture, we are able to respond to requests for field inspections with little to no advance notice and expedite laboratory tests to avoid needless downtime and change orders.